CN105825796A - Projection control method, projection control device and projection device - Google Patents

Abstract

The invention discloses a projection control method, device and projection equipment. Before formal projection, all standard color content is projected onto the projection surface, and then the current display content of the projection surface is collected to obtain a projection surface test picture; each pixel of the projection surface test picture is Compare the color of the point with the standard color to determine the non-standard color pixel points that need color correction; perform color correction on the non-standard color pixel points to obtain the corrected color of each non-standard color pixel point; The non-standard color pixels are projected with the corresponding corrected color. Since the present invention corrects the color of non-standard color pixels on the projection surface, and uses the corrected colors for projection of these pixels during projection, it can be used when there is no projection cloth, or there is a stain on the projection wall, or there is a stain on the projection wall. Or when the ambient light is colored, the color reproduction of the projected image is improved, the projection quality is improved, and the satisfaction of the user experience is improved.

Description

Projection control method, device and projection equipment

technical field

The present invention relates to the field of multimedia, in particular to a projection control method, device and projection equipment.

Background technique

A projector, also known as a projector, is a device that can project images or videos onto a screen. It can be connected to a computer, VCD, DVD, BD, game console, DV, etc. through different interfaces to play the corresponding video signal. Projectors are widely used in homes, offices, schools, and entertainment venues. According to different working methods, there are different types such as CRT, LCD, and DLP. According to statistics, in 2010 China's projector market shipments reached 1.28 million units, an increase of 43.6% compared to 2009. According to the analysis, China's projector market will continue to grow rapidly in 2011, with annual shipments reaching 1.67 million units and an annual growth rate of about 30%. In the next five years, the compound growth rate of China's projector market will reach 17.1%. In the past two years, with the rapid decline in the cost and price of projectors, the market has experienced a blowout, and projectors have quickly entered thousands of households. Home theater and portable business projectors have gradually become the main models in the market.

The projection principle of existing projectors is to combine the corresponding color according to the color (RGB value) of each pixel of the projected content, and the light passes through the color and is projected by the lens to the surface of the front object (curtain, wall, etc.) to form an image. However, due to the fact that the projection environment of the home or simple business may not be very standard, the projection surface may not be standard. For example, when the ambient light is colored, or there is no special projection screen and the wall with its own color or stain is directly used as the projection surface, the projection will be on it. The color of the image will produce color deviation, which will reduce the color reproduction of the image to a certain extent, and affect the viewing effect of the projected image.

Contents of the invention

The main technical problem to be solved by the present invention is to provide a projection control method, device and projection equipment to solve the problem of poor projection effect caused by non-standard projection surface in the existing projection process.

In order to solve the above technical problems, the present invention provides a projection control method, including:

Project the full standard color content onto the projection surface, and then collect the current display content of the projection surface to obtain the projection surface test picture;

Comparing the color of each pixel of the projection surface test picture with the standard color to determine the non-standard color pixel that needs color correction;

Performing color correction on the non-standard color pixel points to obtain the corrected color of each non-standard color pixel point;

When projecting on the projection surface, the non-standard color pixel points are projected using the corresponding corrected color.

In an embodiment of the present invention, the determination of non-standard color pixel points that need color correction includes:

Obtain the color of each pixel of the projection surface test picture;

Determine whether the color of each pixel is the same as the standard color, if not, determine that the pixel is a non-standard color pixel; otherwise, determine that the pixel is a standard color pixel.

In an embodiment of the present invention, performing color correction on the non-standard color pixels includes:

Using the color of the non-standard color pixel in the projection surface test picture as the background color of the pixel;

Obtaining the color corresponding to the content to be projected by the non-standard color pixel as the foreground color of the pixel;

According to the background color and the foreground color of the pixel of the non-standard color, the corresponding best display color is found in the preset color card conversion table as the corrected color of the pixel; the color card conversion table includes each background color and The best display color corresponding to the foreground color.

In one embodiment of the present invention, the preset color card conversion table includes:

Select color C _i as the background color from the standard color card range table, the i is greater than or equal to 1, less than or equal to n, and the n is the total number of colors included in the standard color card range table;

Using the background color and the standard color as the test background colors of the first test projection surface and the second test projection surface respectively;

Select color C _j as the foreground color from the range table of the standard color card, and project the test image onto the first test projection surface and the second test projection surface respectively with the foreground color content; the j is greater than or equal to 1 , less than or equal to n, said n is the total number of colors contained in the standard color card range table;

Adjust the test image color on the first test projection surface to make its display effect consistent with the test image display effect on the second test projection surface, and use the final adjusted color as the background color corresponding to the foreground color The best display color Z _ij is recorded in the color card conversion table;

or,

Select color C _i as the background color from the standard color card range table, the i is greater than or equal to 1, less than or equal to n, and the n is the total number of colors included in the standard color card range table;

Using the background color as the test background color of the test projection surface;

Select color C _j as the foreground color from the range table of the standard color card, and project the test image onto the test projection surface with the content of the foreground color; the j is greater than or equal to 1, and is less than or equal to n, and the n is all The total number of colors contained in the standard color card range table;

Adjust the test image color on the test projection surface to achieve the best display effect, and record the final adjusted color in the color card conversion table as the best display color Z _ij corresponding to the background color and the foreground color .

In one embodiment of the present invention, the standard color is white.

In order to solve the above problems, the present invention also provides a projection control device, including a test picture acquisition module, a judgment module, a color correction module and a projection module;

The test picture acquisition module is used to project full standard color content onto the projection surface, and then collect the current display content of the projection surface to obtain the projection surface test picture;

The judging module is used to compare the color of each pixel point of the projection surface test picture with the standard color to determine the non-standard color pixel points that need color correction;

The color correction module is used to perform color correction on the non-standard color pixel points to obtain the corrected color of each non-standard color pixel point;

The projection module is used for projecting the non-standard color pixels using a corresponding corrected color when projecting on the projection surface.

In one embodiment of the present invention, the judgment module includes a color acquisition submodule and a comparison submodule;

The color acquisition sub-module is used to acquire the color of each pixel of the projection surface test picture;

The comparison sub-module is used to determine whether the color of each pixel is the same as the standard color, if not, then determine that the pixel is a non-standard color pixel; otherwise, determine that this pixel is a standard color pixel.

In an embodiment of the present invention, the color correction module includes a background color determination submodule, a foreground color determination submodule, and a search submodule;

The background color determination submodule is used to use the color of the non-standard color pixel in the projection surface test picture as the background color of the pixel;

The foreground color determination submodule is used to acquire the color corresponding to the content to be projected by the non-standard color pixel as the foreground color of the pixel;

The search sub-module is used to find the corresponding best display color in the preset color card conversion table according to the background color and foreground color of the non-standard color pixel point as the corrected color of the pixel point; the color card The conversion table contains the best display colors for each background color and foreground color.

In one embodiment of the present invention, it also includes a color card conversion table setting module, the color card conversion table setting module includes a first background color selection sub-module, a first test background color determination sub-module, a first foreground color selection a submodule and a first adjustment submodule;

The first background color selection submodule is used to select the color C _i as the background color from the standard color card range table, and the i is greater than or equal to 1 and less than or equal to n, and the n is included in the standard color card range table the total number of colors;

The first test background color determination submodule is used to use the background color and the standard color as the test background colors of the first test projection surface and the second test projection surface respectively;

The first foreground color selection submodule is used to select color C _j as the foreground color from the standard color card range table, and project the test image onto the first test projection surface and the second test projection surface respectively with the foreground color content. On the test projection surface; said j is greater than or equal to 1, less than or equal to n, and said n is the total number of colors contained in the standard color card range table;

The first adjustment sub-module is used to adjust the color of the test image on the first test projection surface so that the display effect is the best or the display effect is consistent with the display effect of the test image on the second test projection surface, and the final adjustment The final color is recorded in the color card conversion table as the best display color Z _ij corresponding to the background color and the foreground color;

Or the color card conversion table setting module includes a second background color selection submodule, a second foreground color selection submodule, a second test background color determination submodule, and a second adjustment submodule;

The second background color selection submodule is used to select the color C _i as the background color from the standard color card range table, and the i is greater than or equal to 1 and less than or equal to n, and the n is included in the standard color card range table the total number of colors;

The second test background color determination submodule is used to use the background color as the test background color of the test projection surface;

The second foreground color selection submodule is used to select color C _j as the foreground color from the standard color card range table, and project the test image onto the test projection surface with the foreground color content; the j is greater than or equal to 1, less than or equal to n, said n is the total number of colors contained in the standard color card range table;

The second adjustment sub-module is used to adjust the color of the test image on the test projection surface to achieve the best display effect, and use the final adjusted color as the best display color corresponding to the background color and the foreground color Z _ij is recorded in the color card conversion table.

In order to solve the above problems, the present invention also provides a projection device, including a projector, an image collector and a processor; the projector is used to project full standard color content onto the projection surface; the image collector is used to After the projector projects the full standard color content onto the projection surface, the current display content of the projection surface is collected to obtain a projection surface test picture; the processor is used to compare the color of each pixel of the projection surface test picture with the standard color determining the non-standard color pixel points that need color correction, performing color correction on the non-standard color pixel points to obtain the corrected color of each non-standard color pixel point, and when the projector is projected on the projection surface, controlling The projector uses a corresponding correction color to project the non-standard color pixel point.

In one embodiment of the present invention, the image collector is a camera module.

The beneficial effects of the present invention are:

The projection control method, device, and projection equipment provided by the present invention project full standard color content onto the projection surface before formal projection, and then collect the current display content of the projection surface to obtain a projection surface test picture; Compare the color with the standard color to determine the non-standard color pixels that need color correction; perform color correction on the non-standard color pixels to obtain the corrected color of each non-standard color pixel; Standard color pixels are projected using the corresponding corrected color. Since the present invention performs color correction on the non-standard color pixels on the projection surface, and uses the corrected colors for projection of these pixels during projection, it can reduce the influence of non-standard color pixels on the projected image, so it can be used in When there is no projection screen, or there are stains on the projection screen, the projection wall, or the ambient light is colored, the color reproduction of the projected image will be improved, the projection quality will be improved, and the satisfaction of the user experience will be improved.

Description of drawings

FIG. 1 is a schematic flowchart of a projection control method provided by Embodiment 1 of the present invention;

FIG. 2 is a schematic flow chart of determining non-standard color pixel points provided by Embodiment 1 of the present invention;

FIG. 3 is a schematic flowchart of the color correction process provided by Embodiment 1 of the present invention;

Fig. 4 is a schematic flow chart of setting a color card conversion table provided by Embodiment 1 of the present invention;

Fig. 5 is a schematic flow chart of setting another color card conversion table provided by Embodiment 1 of the present invention;

6 is a schematic diagram of a test projection surface provided by Embodiment 1 of the present invention;

FIG. 7 is a schematic structural diagram of a projection control device provided in Embodiment 2 of the present invention;

FIG. 8 is a schematic structural diagram of another projection control device provided by Embodiment 2 of the present invention;

FIG. 9 is a schematic structural diagram of a projection device provided by Embodiment 3 of the present invention;

FIG. 10 is a schematic diagram of the color value determination process of each pixel of the projection wall provided by Embodiment 3 of the present invention;

FIG. 11 is a schematic diagram of a formal projection process provided by Embodiment 3 of the present invention.

detailed description

The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

Embodiment one:

Please refer to FIG. 1, the projection control method in this embodiment includes:

Step 101: before the official projection, project all standard color content onto the projection surface, and then collect the current display content on the projection surface to obtain a projection surface test picture;

Step 102: comparing the color of each pixel of the projection surface test picture with the standard color to determine the non-standard color pixel that needs color correction;

Step 103: performing color correction on non-standard color pixel points to obtain the corrected color of each non-standard color pixel point;

Step 104: When formally projecting on the projection surface, the non-standard color pixel points on the projection surface are projected using the corresponding corrected color.

It can be seen that this embodiment can identify the non-standard color pixels on the projection surface before the official projection, and can correct the color of the identified non-standard color pixels, and then use the corrected color for these pixels during the official projection. Projection can reduce the impact of non-standard color pixels on the projected image, so it can improve the color reproduction of the projected image in non-standard projection environments such as no projection cloth, projection cloth, stains on the projection wall, or colored ambient light. , improve the projection quality, and then improve the satisfaction of the user experience.

The standard color in the above step 101 is mainly selected to be the same color as the standard projection surface (eg standard projection screen). Since the color of the existing standard projection surface is generally set to white, the standard color in this embodiment is set to white. However, it should be understood that the standard color in this embodiment is not limited to white, and it can change with the color of the standard projection surface, or even change according to the needs of users.

In the above step 102, please refer to Fig. 2 to determine the non-standard color pixel points that need to be color corrected on the projection surface, including:

Step 1021: Obtain the color of each pixel of the projection surface test picture, specifically the RGB value of each pixel color;

Step 1022: judge respectively whether the color of each pixel is the same as the standard color (specifically, it can be judged whether the color RGB value of each pixel is equal to the RGB value of the standard color or within the range of the RGB value of the standard color), if not, go to step 1023; otherwise, go to step 1024:

Step 1023: Determine that the pixel point is a non-standard color pixel point.

Step 1024: Determine that the pixel point is a standard color pixel point.

In the above step 1022, the projection surface may be a professional projection cloth, or various walls, etc. The color of the pixels on the projection surface is different from the standard color, which may be caused by the color of the projection surface itself, or the presence of stains, or the color of the ambient light. In the above-mentioned step 1024, since the color of the pixel determined as the standard color is consistent with the standard color, no additional color correction is required.

In the above step 103, color correction is performed on the confirmed non-standard color pixels, as shown in FIG. 3 , including:

Step 1031: use the color of the non-standard color pixel in the test picture on the projection surface as the background color of the pixel;

Step 1032: Obtain the color corresponding to the content to be projected by the non-standard color pixel as the foreground color of the pixel;

Step 1033: According to the background color and the foreground color of the non-standard color pixel, look up the corresponding best display color in the preset color card conversion table as the corrected color of the pixel point; the preset color card conversion table here contains The best display color for each background color and foreground color.

In this embodiment, the process of presetting the color card conversion table is shown in Figure 4, including:

Step 401: Select color C _i from the standard color card range table as the background color, where i is greater than or equal to 1 and less than or equal to n, i=i+1; n is the total number of colors contained in the standard color card range table;

Step 402: Use the selected background color and standard color as the test background colors of the first test projection surface and the second test projection surface respectively, that is, set the first test projection surface and the second test projection surface as the background color and background respectively color, the first test projection surface and the second test projection surface in this embodiment are all the same except that the test background color is different;

Step 403: Select color C _j from the standard color card range table as the foreground color, and project the test image onto the first test projection surface and the second test projection surface respectively with the foreground color content; j is greater than or equal to 1, less than or equal to n , j=j+1; n is the total number of colors contained in the standard color card range table;

Step 404: Adjust the color of the test image on the first test projection surface so that its display effect is consistent with the display effect of the test image on the second test projection surface, and use the final adjusted color as the best display corresponding to the current background color and foreground color Color Z _ij is recorded in the color card conversion table.

The setting process of the color card conversion table shown in FIG. 4 is adjusted with the graphics on the standard test projection surface (ie, the second test projection surface) by means of the comparison of the graphics on the standard test projection surface. But it should be understood that this embodiment can also be set without using the standard test projection surface, for example, please refer to Figure 5, including:

Step 501: select color C _i from the standard color card range table as the background color, where i is greater than or equal to 1, less than or equal to n, i=i+1; n is the total number of colors contained in the standard color card range table;

Step 502: use the selected background color as the test background color of the test projection surface, that is, set the test projection surface as the background color;

Step 503: Select color C _j from the standard color card range table as the foreground color, and project the test image onto the test projection surface with the content of the foreground color; j is greater than or equal to 1, less than or equal to n, j=j+1; n is The total number of colors contained in the standard color card range table;

Step 504: Adjust the color of the test image on the test projection surface to achieve the best display effect, and record the final adjusted color as the best display color Z _ij corresponding to the background color and the foreground color in the color card conversion table middle. The judging condition for the best display effect in this step can be selected and set according to different application scenarios. For example, for an application scenario requiring the best definition, the judging condition can be set as the best display definition.

The test image projected onto the test projection surface in this embodiment may be any image, such as a line image, a circular image, and the like. It should be understood that, in this embodiment, the test image projected on the first test projection surface is preferably the same as the test image projected on the second test projection surface, so as to facilitate comparison and analysis.

In order to better understand the present invention, the setting process shown in Figure 4 will be further illustrated below in combination with the specific standard color card range table, taking the standard color as white as an example:

1. Select a set of color cards with appropriate precision as the standard color card range table, and determine the RGB value range corresponding to each color in the color card. For the standard color card range table, please refer to Table 1:

Table I

color name R range G range B range C1 R1—R2 G1—G2 B1—B2 C2 R3—R4 G3—G4 B3—B4 ... ... ... ...

Cn R2n-1—R2n G2n-1—G2n B2n-1—B2n

For each color C (R, G, B), the corresponding color card color S can be determined according to the corresponding RGB range in Table 1, and the color S satisfies the following conditions:

S=(Rs1<=R&&Rs2>R)&&(Gs1<=G&&Gs2>G)&&(Bs1<=B&&Bs2>B)

In the above formula, Rs1 and Rs2 correspond to the R range, Gs1 and Gs2 correspond to the G range, and Bs1 and Bs2 correspond to the B range.

2. Set the color card conversion table

Select a color C _i (R _i , G _i , B _i )=( _ri ,gi , _bi ) from Table ₁ as the background color, where i is greater than or equal to 1 and less than or equal to n, i=i +1;

The selected color C _i and the standard color are white as the test background color of the first test projection surface and the second test projection surface respectively; then select the color C _j (R2j-1-R2j, G2j-1 —G2j, B2j-1—B2j) is used as the foreground color for testing. In order to make this color more representative, set the RGB value of this color C _j in the projector as follows:

(Rj, Gj, Bj) = ((R2j-1+R2j)/2, (G2j-1+G2j)/2, (B2j-1+B2j)/2);

Project the test image respectively with the content of the foreground color C _j (see also shown in Figure 6, this image is the first test projection plane in the area above the two straight lines, and the second test projection plane in the area below) onto the first test projection plane and the second test projection surface, adjust the color of the straight line on the first test projection surface so that its display effect is consistent with the straight line on the second test projection surface (that is, basically the same), and record the corresponding color as the current background color The optimal display color Z _ij corresponding to the foreground color is recorded in the color card conversion table.

Repeat the above process, use each color in Table 1 and the standard color white as the colors of the first test projection surface and the second test projection surface respectively, you can find the best display color corresponding to each color as the foreground color and record it in the color In the card conversion table, please refer to Table 2 for the obtained color card conversion table:

Table II

background\foreground C1 C2 C3 C4 ... Cn C1 Z ₁₁ Z ₁₂ Z ₁₃ Z ₁₄ ... Z _1n C2 Z ₂₁ Z ₂₂ Z ₂₃ Z ₂₄ ... Z ₂ ... ... ... ... ... ... ... Cn Z _n Z _n2 Z _n3 Z _n4 ... Z _nn

3. Perform formal projection

Before the official content is projected, first project all the standard color, that is, white content, onto the projection surface, and then take pictures of the projection surface to obtain the projection surface test picture; according to the projection surface test picture, each pixel point (x, y) of the picture can be obtained ) corresponding to the RGB value, according to the RGB value of each pixel point, the color Cn corresponding to the color card can be found in the standard color card range table; if Cn is white, change the color without correction, if it is not white, then determine the pixel point It is a non-standard color pixel, record the background color Cn of this pixel, and get the list of pixels to be corrected on the projection surface, as shown in Table 3:

Table three

coordinate 1 2 ... N 1 2 C1 C1 ... C2 C3

*Note: Blank means that the pixel does not need to be corrected;

When the official content is projected, according to the position (X, Y) of each pixel point X (rgb) of the image, calculate its position (x, y) in Table 3, and look up the table to get C (x, y); if C ( x,y)=Cx is empty, then display the color directly; if not empty:

1. According to the X(rgb) color card range table, the color card color Ck corresponding to the projected content of the pixel point is obtained as the foreground color of the pixel point;

2. According to the background color Cx and the foreground color Ck, look up Table 2 to obtain the optimal color Z of the pixel adjusted according to the background color, that is, the corrected color Z;

3. Use the corrected color Z to project at the pixel point (x, y).

Embodiment two:

This embodiment provides a projection control device, as shown in FIG. 7 , including a test picture acquisition module 71, a judgment module 72, a color correction module 73, and a projection module 74;

The test picture acquisition module 71 is used to project full standard color content onto the projection surface, and then collect the current display content of the projection surface to obtain the projection surface test picture;

The judging module 72 is used to compare the color of each pixel point of the projection surface test picture with the standard color to determine the non-standard color pixel points that need color correction;

The color correction module 73 is used to correct the color of the non-standard color pixel points to obtain the corrected color of each non-standard color pixel point;

The projection module 74 is used for projecting the non-standard color pixel points on the projection surface using the corresponding corrected color for projection when projecting on the projection surface.

The standard color in this embodiment is mainly selected to be the same color as the standard projection surface (eg, standard projection screen). Since the color of the existing standard projection surface is generally set to white, the standard color in this embodiment is set to white. However, it should be understood that the standard color in this embodiment is not limited to white, and it can change with the color of the standard projection surface, or even change according to the needs of users.

The judging module 72 in this embodiment includes a color acquisition submodule and a comparison submodule;

The color acquisition sub-module is used to acquire the color of each pixel of the projection surface test picture;

The comparison sub-module is used to determine whether the color of each pixel is the same as the standard color, if not, then determine that the pixel is a non-standard color pixel; otherwise, determine that this pixel is a standard color pixel.

The projection surface in this embodiment may be a professional projection cloth, or various walls and the like. The color of the pixels on the projection surface is different from the standard color, which may be caused by the color of the projection surface itself, or the presence of stains, or the color of the ambient light. Pixels determined to be standard colors do not require additional color correction because their colors are consistent with the standard colors.

The color correction module 73 comprises a background color determination submodule, a foreground color determination submodule and a search submodule;

The background color determination sub-module is used to use the color of the non-standard color pixel in the projection surface test picture as the background color of the pixel;

The foreground color determination sub-module is used to obtain the color corresponding to the content to be projected by the non-standard color pixel as the foreground color of the pixel;

The search sub-module is used to find the corresponding best display color in the preset color card conversion table according to the background color and foreground color of the non-standard color pixel point as the corrected color of the pixel point; the color card conversion table contains each background color The best display color for the color and foreground color.

Referring to Fig. 8, the projection control device also includes a color card conversion table setting module 75, and the color card conversion table setting module 75 includes a first background color selection submodule, a first test background color determination submodule, a first foreground color selection a submodule and a first adjustment submodule;

The first background color selection submodule is used to select the color C _i as the background color from the standard color card range table, where i is greater than or equal to 1, less than or equal to n, i=i+1; n is set by the standard color card range table the total number of colors included;

The first test background color determination submodule is used to use the selected background color and standard color as the test background colors of the first test projection surface and the second test projection surface respectively, that is, the first test projection surface and the second test projection surface respectively Set to the background color and background color, the first test projection surface and the second test projection surface in this embodiment are all the same except that the test background color is different;

The first foreground color selection submodule is used to select color C _j as the foreground color from the standard color card range table, and project the test image onto the first test projection surface and the second test projection surface respectively with the content of the foreground color; j is greater than Equal to 1, less than or equal to n, j=j+1; n is the total number of colors contained in the standard color card range table;

The first adjustment sub-module is used to adjust the color of the test image on the first test projection surface to make its display effect consistent with the display effect of the test image on the second test projection surface, and use the final adjusted color as the current background color corresponding to the foreground color The best display color Z _ij is recorded in the color card conversion table.

Or the color card conversion table setting module 75 includes a second background color selection submodule, a second foreground color selection submodule, a second test background color determination submodule and a second adjustment submodule;

The second background color selection submodule is used to select the color C _i as the background color from the standard color card range table, where i is greater than or equal to 1, less than or equal to n, i=i+1; n is set by the standard color card range table the total number of colors included;

The second test background color determination submodule is used to use the selected background color as the test background color of the test projection surface, that is, to set the test projection surface to the background color;

The second foreground color selection submodule is used to select color C _j as the foreground color from the standard color card range table, and project the test image onto the test projection surface with the foreground color content; j is greater than or equal to 1, less than or equal to n, j= j+1; n is the total number of colors contained in the standard color card range table;

The second adjustment sub-module is used to adjust the test image color on the test projection surface to achieve the best display effect, and record the final adjusted color as the best display color Z _ij corresponding to the background color and the foreground color. In the color card conversion table. The judging condition for the best display effect in this step can be selected and set according to different application scenarios. For example, for an application scenario requiring the best definition, the judging condition can be set as the best display definition.

The test image projected onto the test projection surface in this embodiment may be any image, such as a line image, a circular image, and the like. It should be understood that, in this embodiment, the test image projected on the first test projection surface is preferably the same as the test image projected on the second test projection surface, so as to facilitate comparison and analysis.

Embodiment three:

This embodiment provides a kind of projection equipment, and this projection equipment can be various professional projectors, also can be mobile terminal such as various mobile phones, PAD etc. with projection function, please refer to as shown in Fig. 9, comprise projector 91, An image collector 92 and a processor 93; the projector in this embodiment includes devices such as projection lamps, and the image collector in this embodiment is mainly used for taking pictures, which may be a camera module. When the projection device is an existing projector, the hardware can increase the image collector 92 on the projection device, and make it controlled by the processor, and the image data collected by the image collector 92 can be saved to the memory or memory of the projection device Middle; when the projection device is a mobile terminal such as a mobile phone and a PAD with a projection function, it can be seen that the camera of such a mobile terminal is directly used as the image collector 92 . Specifically, the projector 91 is used to project full standard color content onto the projection surface; the image collector 92 is used to collect the currently displayed content on the projection surface to obtain a projection surface test picture after the projector projects the full standard color content onto the projection surface; The processor 93 is used to compare the color of each pixel point of the projection surface test picture with a standard color (such as white) to determine the non-standard color pixel points that need color correction, and perform color correction on the non-standard color pixel points to obtain each non-standard color pixel point. The corrected color of the color pixel, and when the projector 91 is officially projecting on the projection surface, the projector is controlled to project the non-standard color pixel on the projection surface with the corresponding corrected color. The following uses the projection device as an example, and takes the projection surface as a projection wall as an example to illustrate the projection control process:

1. Take pictures and get the color (color card) of the projection wall, as shown in Figure 10, including:

Step 1001: Initialize pre-cured: color card range table: ColorRangeTable; color card conversion table: ColorTransformTable; initialization: projection wall color card, bgColorTbale[][]=null;

Step 1002: Project all white content onto the projection wall;

Step 1003: taking pictures of the projection wall to obtain the test image content bgBitmap of the projection wall;

Step 1004: Circularly detect whether each pixel point is a non-standard color pixel point, specifically, the loop can be performed in the following manner:

For(x=0; x++; x<image length)

For(y=0; y++; y<image height)

PointColor = bgBitmap[x][y];

Step 1005: According to the RGB of PointColor, the color card range table can be searched to obtain the color card color Ck of the pixel point;

Step 1006: judge whether Ck is white, if so, then bgColorTable[x][y]=null; otherwise, bgColorTable[x][y]=Ck;

Step 1007: Judging whether the cycle is over, if not, go to step 1004; otherwise, go to step 1008;

Step 1008: the process ends, bgColorTable is the background wall color (color card) matrix (that is shown in Table 3 in Embodiment 1).

2. Please refer to Figure 11 for the color conversion and projection process of the projected content, including:

Step 1101: Obtain cBitmap of the image content to be projected;

Step 1102: Perform loop detection to obtain the color PC corresponding to the content to be projected by each pixel, and the loop method is as follows:

For(x=0; x++; x<image length)

For(y=0; y++; y<image height)

Content color: PC=cgBitmap[x][y];

Step 1103: Obtain the background color of the pixel: bgCk=bgColorTable[x][y];

Step 1104: judge whether bgCk is empty, if yes, the content of the pixel point is not modified, and go to step 1102; otherwise, go to step 1105;

Step 1105: According to bgCK (background color) and PC (foreground color), the corrected color Z is obtained from the color card conversion table ColorTransformTable: ColorTransformTable[bgCk[[Ck], modify the content:

cBitmap[x][y]=ColorTransformTable[bgCk[[Ck]

Step 1106: judge whether the loop is over, if not, go to step 1102; otherwise, go to step 1107;

Step 1107: For these non-standard color pixels, project the converted content: cBitmap.

The above content is a further detailed description of the present invention in conjunction with specific embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deduction or replacement can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims (11)

1. A projection control method, characterized in that, comprising: Project the full standard color content onto the projection surface, and then collect the current display content of the projection surface to obtain the projection surface test picture; Comparing the color of each pixel of the projection surface test picture with the standard color to determine the non-standard color pixel that needs color correction; Performing color correction on the non-standard color pixel points to obtain the corrected color of each non-standard color pixel point; When projecting on the projection surface, the non-standard color pixel points are projected using the corresponding corrected color. 2. The projection control method according to claim 1, wherein said determining the non-standard color pixel points that need color correction comprises: Obtain the color of each pixel of the projection surface test picture; Determine whether the color of each pixel is the same as the standard color, if not, determine that the pixel is a non-standard color pixel; otherwise, determine that the pixel is a standard color pixel. 3. The projection control method according to claim 1 or 2, wherein performing color correction on the non-standard color pixels comprises: Using the color of the non-standard color pixel in the projection surface test picture as the background color of the pixel; Obtaining the color corresponding to the content to be projected by the non-standard color pixel as the foreground color of the pixel; According to the background color and the foreground color of the pixel of the non-standard color, the corresponding best display color is found in the preset color card conversion table as the corrected color of the pixel; the color card conversion table includes each background color and The best display color corresponding to the foreground color. 4. The projection control method according to claim 3, wherein the preset color card conversion table comprises: Select color C _i as the background color from the standard color card range table, the i is greater than or equal to 1, less than or equal to n, and the n is the total number of colors included in the standard color card range table; Using the background color and the standard color as the test background colors of the first test projection surface and the second test projection surface respectively; Select color C _j as the foreground color from the range table of the standard color card, and project the test image onto the first test projection surface and the second test projection surface respectively with the foreground color content; the j is greater than or equal to 1 , less than or equal to n, said n is the total number of colors contained in the standard color card range table; Adjust the test image color on the first test projection surface to make its display effect consistent with the test image display effect on the second test projection surface, and use the final adjusted color as the background color corresponding to the foreground color The best display color Z _ij is recorded in the color card conversion table; or, Select color C _i as the background color from the standard color card range table, the i is greater than or equal to 1, less than or equal to n, and the n is the total number of colors included in the standard color card range table; Using the background color as the test background color of the test projection surface; Select color C _j as the foreground color from the range table of the standard color card, and project the test image onto the test projection surface with the content of the foreground color; the j is greater than or equal to 1, and is less than or equal to n, and the n is all The total number of colors contained in the standard color card range table; Adjust the test image color on the test projection surface to achieve the best display effect, and record the final adjusted color in the color card conversion table as the best display color Z _ij corresponding to the background color and the foreground color . 5. The projection control method according to claim 1 or 2, wherein the standard color is white. 6. A projection control device, characterized in that it includes a test picture acquisition module, a judgment module, a color correction module and a projection module; The test picture acquisition module is used to project full standard color content onto the projection surface, and then collect the current display content of the projection surface to obtain the projection surface test picture; The judging module is used to compare the color of each pixel point of the projection surface test picture with the standard color to determine the non-standard color pixel points that need color correction; The color correction module is used to perform color correction on the non-standard color pixel points to obtain the corrected color of each non-standard color pixel point; The projection module is used for projecting the non-standard color pixels using a corresponding corrected color when projecting on the projection surface. 7. The projection control device according to claim 6, wherein the judging module comprises a color acquisition submodule and a comparison submodule; The color acquisition sub-module is used to acquire the color of each pixel of the projection surface test picture; The comparison sub-module is used to determine whether the color of each pixel is the same as the standard color, if not, then determine that the pixel is a non-standard color pixel; otherwise, determine that this pixel is a standard color pixel. 8. The projection control device according to claim 6 or 7, wherein the color correction module includes a background color determination submodule, a foreground color determination submodule, and a search submodule; The background color determination submodule is used to use the color of the non-standard color pixel in the projection surface test picture as the background color of the pixel; The foreground color determination submodule is used to acquire the color corresponding to the content to be projected by the non-standard color pixel as the foreground color of the pixel; The search sub-module is used to find the corresponding best display color in the preset color card conversion table according to the background color and foreground color of the non-standard color pixel point as the corrected color of the pixel point; the color card The conversion table contains the best display colors for each background color and foreground color. 9. The projection control device according to claim 8, further comprising a color card conversion table setting module, the color card conversion table setting module comprising a first background color selection sub-module, a first test background color determination sub-module module, a first foreground color selection submodule, and a first adjustment submodule; The first background color selection submodule is used to select the color C _i as the background color from the standard color card range table, and the i is greater than or equal to 1 and less than or equal to n, and the n is included in the standard color card range table the total number of colors; The first test background color determination submodule is used to use the background color and the standard color as the test background colors of the first test projection surface and the second test projection surface respectively; The first foreground color selection submodule is used to select color C _j as the foreground color from the standard color card range table, and project the test image onto the first test projection surface and the second test projection surface respectively with the foreground color content. On the test projection surface; said j is greater than or equal to 1, less than or equal to n, and said n is the total number of colors contained in the standard color card range table; The first adjustment sub-module is used to adjust the color of the test image on the first test projection surface so that the display effect is the best or the display effect is consistent with the display effect of the test image on the second test projection surface, and the final adjustment The final color is recorded in the color card conversion table as the best display color Z _ij corresponding to the background color and the foreground color; Or the color card conversion table setting module includes a second background color selection submodule, a second foreground color selection submodule, a second test background color determination submodule, and a second adjustment submodule; The second background color selection submodule is used to select the color C _i as the background color from the standard color card range table, and the i is greater than or equal to 1 and less than or equal to n, and the n is included in the standard color card range table the total number of colors; The second test background color determination submodule is used to use the background color as the test background color of the test projection surface; The second foreground color selection submodule is used to select color C _j as the foreground color from the standard color card range table, and project the test image onto the test projection surface with the foreground color content; the j is greater than or equal to 1, less than or equal to n, said n is the total number of colors contained in the standard color card range table; The second adjustment sub-module is used to adjust the color of the test image on the test projection surface to achieve the best display effect, and use the final adjusted color as the best display color corresponding to the background color and the foreground color Z _ij is recorded in the color card conversion table. 10. A projection device, characterized in that it includes a projector, an image collector and a processor; the projector is used to project full standard color content onto a projection surface; the image collector is used to project full color content on the projector After the standard color content is on the projection surface, the current display content of the projection surface is collected to obtain the projection surface test picture; the processor is used to compare the color of each pixel point of the projection surface test picture with the standard color to determine the need for color Corrected non-standard color pixel points, performing color correction on the non-standard color pixel points to obtain the corrected color of each non-standard color pixel point, and when the projector is projected on the projection surface, controlling the projector The non-standard color pixel is projected using the corresponding corrected color. 11. The projection device according to claim 10, wherein the image collector is a camera module.