CN104484853A - Method and device for clipping pictures containing graphical signs - Google Patents

Abstract

The present invention provides a method and device for clipping a picture containing a graphic symbol, mainly relates to the field of Internet technology, and the main purpose is to provide a technical solution suitable for clipping a picture containing a graphic symbol. The method includes: detecting the original picture to be cropped, detecting some or all features of one or more graphic signs contained in the original picture; cutting the original picture to obtain a target picture, and retaining at least one graphic sign in the target picture some or all of the features. According to the present invention, when it is detected that the original picture is a picture containing a graphic logo, the cropped target picture is required to contain at least part or all of the technical features of a graphic logo; graphic logos generally represent specific meanings, for example, representing the brand of a commodity , logo, etc., so retaining the characteristics of the graphic logo can make the cropped target picture still reflect a specific meaning.

Description

Method and device for cropping pictures containing graphic signs

technical field

The invention relates to the technical field of the Internet, in particular to a device for cutting pictures containing graphic signs.

Background technique

In the Internet field, it is usually necessary to crawl a large number of pictures on the Internet. Due to the different sizes of pictures on the Internet, it will be difficult for the size of the captured pictures to meet the requirements. At this time, the computer needs to automatically complete the cropping of the pictures so that the size of the pictures meets the needs.

For different pictures, because the content displayed in the pictures is different, the parts that need to be cropped in the pictures are also different. Labeling is a problem. The current cropping method using thirds composition and golden ratio composition is all to crop the fixed position in the picture, which greatly damages the graphic logo, so it is difficult to ensure that the effect of the cropped picture is satisfactory, or Manual re-cutting is not efficient.

Contents of the invention

In view of the above problems, the present invention is proposed to provide a method and device for cropping a picture containing a graphic logo that overcomes the above problems or at least partially solves the above problems.

According to one aspect of the present invention, there is provided a method for cropping a picture containing graphic signs, which includes: detecting the original picture to be cropped, and detecting the part of one or more graphic signs contained in the original picture or all of the features; cutting the original picture to obtain a target picture, in which at least one part or all of the features of the graphic sign is retained.

Optionally, in the aforementioned method, clipping the original picture to obtain the target picture specifically includes: obtaining the size of the target picture; scaling the original picture according to the size of the target picture, so that the original The size of the picture does not exceed the size of the target picture; draw a cropped area according to the size of the target picture, and copy the image of the original picture into the cropped area, and crop the cropped area to obtain the A target picture to retain all the features of all the graphic signs in the original picture.

Optionally, the aforementioned method further includes: detecting the size of the original picture, including the height and width of the original picture; acquiring the size of the target picture, specifically including: acquiring the height and width of the target picture; Scaling the original picture according to the size of the target picture specifically includes: calculating the ratio of the height of the original picture to the height of the target picture, and calculating the ratio of the width of the original picture to the target picture The ratio of the widths, and the maximum value of the obtained ratios is used as a scale for scaling the original picture, and the original picture is scaled according to the scale.

Optionally, the aforementioned method further includes: when the image of the original picture cannot fill the cropping area, according to the background color of the graphic logo retained in the target picture, the Fill the portion filled by the image of the original picture.

Optionally, the aforementioned method, before filling the portion of the clipping area that is not filled by the image of the original picture according to the background color of the graphic sign retained in the target picture, further includes: The edge position of the original picture is selected, and the area where the background color is to be extracted is selected from the original picture and color extraction is performed.

Optionally, the aforementioned method further includes: centering the image of the original picture in the cropping area when the image of the original picture cannot fill the cropping area.

According to another aspect of the present invention, there is provided a device for cropping a picture containing a graphic logo, which includes: a graphic logo detection module, configured to detect the original picture to be cropped, and detect the Some or all of the features of one or more graphic signs; a cropping module, configured to cut the original picture to obtain a target picture, in which at least one part or all of the features of the graphic signs are retained.

Optionally, the aforementioned device further includes: a size acquiring module, configured to acquire the size of the target picture; a scaling module, configured to scale the original picture according to the size of the target picture, so that the original The size of the picture does not exceed the size of the target picture; the cropping module is used to draw a cropped area according to the size of the target picture, and copy the image of the original picture into the cropped area, and to the cropped area performing cropping to obtain the target picture, so as to retain all the features of all the graphic signs in the original picture.

Optionally, the aforementioned device further includes: a size detection module, configured to detect the size of the original picture, including the height and width of the original picture; the size acquisition module acquires the height and width of the target picture; The scaling module calculates the ratio of the height of the original picture to the height of the target picture, and calculates the ratio of the width of the original picture to the width of the target picture, and uses the maximum value of the obtained ratios as A scaling ratio for the original picture, and scaling the original picture according to the scaling ratio.

Optionally, the aforementioned device further includes: a color filling module, when the image of the original picture cannot fill the cropped area, according to the background color of the graphic logo retained in the target picture, and according to the extracted The color fills the part of the clipping area that is not filled by the image of the original picture.

Optionally, in the aforementioned device, the color filling module selects the area where the background color is to be extracted from the original picture according to the edge position of the original picture and performs color extraction.

Optionally, in the aforementioned device, the cropping module centers the image of the original picture in the cropping area when the image of the original picture cannot fill the cropping area.

According to the above technical solutions, it can be seen that the method and device for cutting pictures containing graphic signs of the present invention have at least the following advantages:

According to the technical solution of the present invention, when the original picture is detected as a picture containing a graphic mark, it is required to include some or all technical features of at least one graphic mark in the cropped target picture; the graphic mark generally represents a specific meaning, for example, expresses The brand, logo, etc. of the product, so retaining the characteristics of the graphic logo can make the cropped target image still reflect a specific meaning.

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the specific embodiments of the present invention are enumerated below.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiment. The drawings are only for the purpose of illustrating a preferred embodiment and are not to be considered as limiting the invention. Also throughout the drawings, the same reference numerals are used to designate the same components. In the attached picture:

FIG. 1 shows a flow chart of a method for cropping a picture containing a graphic logo according to an embodiment of the present invention;

FIG. 2 shows a flowchart of a method for cropping a picture containing a graphic logo according to an embodiment of the present invention;

FIG. 3 shows a flow chart of a method for cropping a picture containing a graphic logo according to an embodiment of the present invention;

FIG. 4 shows a flow chart of a method for cropping a picture containing a graphic logo according to an embodiment of the present invention;

Fig. 5 shows the original picture cut by the method for cutting a picture containing a graphic logo according to an embodiment of the present invention;

Fig. 6 shows the target picture cropped by the method for cropping a picture containing a graphic logo according to an embodiment of the present invention;

Fig. 7 shows a block diagram of a device for cropping a picture containing a graphic logo according to an embodiment of the present invention;

Fig. 8 shows a block diagram of a device for cropping a picture containing a graphic logo according to an embodiment of the present invention;

Fig. 9 shows a block diagram of a device for cropping a picture containing a graphic logo according to an embodiment of the present invention;

Fig. 10 shows a block diagram of an apparatus for cropping a picture containing a graphic logo according to an embodiment of the present invention.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

As shown in Figure 1, an embodiment of the present invention provides a method for cropping a picture containing a graphic logo, which includes:

Step 110: Detect the original picture to be cropped, and detect some or all features of one or more graphic signs contained in the original picture. In this embodiment, there is no limitation on the features of the graphic sign, which include but not limited to the color and shape of the graphic sign itself, and the background color of the graphic sign.

Step 120, cropping the original picture to obtain a target picture, in which part or all of the features of at least one graphic symbol are retained. In this embodiment, the retained features may be different from the detected features. According to the technical solution of this embodiment, when it is detected that the original picture is a picture containing a graphic mark, the cropped target picture is required to contain at least part or all of the technical features of a graphic mark; the graphic mark generally represents a specific meaning, for example, Represents the brand of the product, etc., so retaining the characteristics of the graphic logo can make the cropped target image still reflect a specific meaning.

According to Figure 1, on the picture of a certain trademark (graphic sign); after the trademark is recognized, when cutting the picture of the trademark, the area where the trademark is located (all features) is cut out, or the contour shape of the trademark is extracted (partial feature); furthermore, when there are multiple trademarks of the same kind coexisting in the picture, it can be cropped according to the trademark of only one of the products.

As shown in Figure 2, an embodiment of the present invention provides a method for cropping a picture containing a graphic logo, which includes:

Step 210: Detect the original picture to be cropped, and detect some or all features of one or more graphic signs contained in the original picture.

Step 220, acquiring the size of the target picture.

Step 230: Scale the original picture according to the size of the target picture so that the size of the original picture does not exceed the size of the target picture. In this embodiment, the size of the original picture does not exceed the size of the target picture, which is beneficial to retain all the features of the original picture.

Step 240, draw a cropped area according to the size of the target picture, copy the image of the original picture into the cropped area, and crop the cropped area to obtain the target picture, so as to retain all the features of all graphic signs in the original picture. According to the technical solution of this embodiment, by zooming the original picture and then cutting it, all the images of the original picture can be preserved, that is, all the features of the graphic mark can be preserved, which is beneficial to fully reflect the meaning of the graphic mark in the cropped picture. Further, when the image of the original picture cannot fill the cropped area, the image of the original picture is centered in the cropped area, which is beneficial to ensure that the cropped picture presents a symmetrical effect.

As shown in Figure 3, an embodiment of the present invention provides a method for cropping a picture containing a graphic logo, which includes:

Step 310: Detect the original picture to be cropped, and detect some or all features of one or more graphic signs contained in the original picture.

Step 320, detecting the height and width of the original picture.

Step 330, including the height and width of the original picture.

Step 340, calculate the ratio of the height of the original picture to the height of the target picture, and calculate the ratio of the width of the original picture to the width of the target picture, and use the maximum value of the obtained ratio as the scaling ratio of the original picture, and Scales the original image proportionally. In this embodiment, scaling is actually performed according to the maximum compression ratio. This method can ensure that the size of the original picture is the largest under the premise that the compressed size of the original picture is smaller than the size of the target picture, which is conducive to the clear display of graphics on the target picture. The characteristics of the sign.

Step 350, draw a cropped area according to the size of the target picture, copy the image of the original picture into the cropped area, and crop the cropped area to obtain the target picture, so as to retain all the features of all graphic signs in the original picture.

According to Figure 3, let the original image be recorded as image _src , whose width and height are width _src and height _src respectively, and the target image to be cropped is recorded as image _dst , whose width and height are width _dst and height _dst respectively, and the units are both pixels. Then the original picture is compressed according to the maximum compression ratio, and the calculation formula of the maximum compression ratio is: max_scale=MAX(width _src /width _dst , height _src /height _dst ). Suppose the image obtained after compression is image _resize , its width and height are respectively width _resize and height _resize , then: width _resize = width _src /max_scale; height _resize = height _src /max_scale.

It should be noted that each of the above formulas is not the only formula for implementing the present invention, and is only used as an implementation manner of the embodiment. Technicians can make appropriate changes to the formula according to business needs, such as adding constants or variables or coefficients, etc., which still fall within the protection scope of the present invention.

As shown in Figure 4, an embodiment of the present invention provides a method for cropping a picture containing a graphic logo, which includes:

Step 410: Detect the original picture to be cropped, and detect some or all features of one or more graphic signs contained in the original picture.

Step 420, acquiring the size of the target picture.

Step 430: Scale the original picture according to the size of the target picture so that the size of the original picture does not exceed the size of the target picture. In this embodiment, the size of the original picture does not exceed the size of the target picture, which is beneficial to retain all the features of the original picture.

Step 440, draw a cropped area according to the size of the target picture, copy the image of the original picture into the cropped area, and crop the cropped area to obtain the target picture, so as to retain all the features of all the graphic signs in the original picture.

Step 450, when the image of the original picture cannot fill the clipping area, select the area where the background color is to be extracted from the original picture according to the edge position of the original picture and perform color extraction. In this embodiment, usually the edge of the original picture containing the graphic logo is the background of the graphic logo.

Step 460: According to the background color of the graphic mark retained in the target picture, fill the portion of the cropping area that is not filled by the image of the original picture. According to the technical solution of this embodiment, selecting the background color for filling can make the filled color basically consistent with the edge color of the copied image, and the overall effect is very good.

According to Fig. 4, in combination with the aforementioned embodiment, when copying the pixel value of image _resize to the middle of image _dst , if the size of image _resize is smaller than image _dst , that is, width _resize <width _dst or height _resize <heigth _dst , then the missing The pixels are filled with the background color.

According to the above two embodiments, the original size of the logo picture shown in FIG. 5 is 194x60. Now if you want to obtain a 100x100 picture, you need to process it according to the following process: a) First, detect that the picture is a logo picture, and at the same time determine that the background color is pure white. b) Calculate the maximum compression ratio, max_sacle=MAX(192/100,60/100)=1.92. c) Compress the picture according to the maximum compression ratio, and the length and width of the compressed picture are 100 and 31 respectively. d) Copy the compressed image pixels to the target image at the center, and fill the missing pixels with the background color to obtain the image shown in Figure 6.

As shown in Figure 7, an embodiment of the present invention provides a device for cropping a picture containing a graphic logo, which includes:

The graphic mark detection module 710 detects the original picture to be cropped, and detects some or all features of one or more graphic marks contained in the original picture. In this embodiment, there is no limitation on the features of the graphic sign, which include but not limited to the color and shape of the graphic sign itself, and the background color of the graphic sign.

The cropping module 720 is used to crop the original picture to obtain a target picture, in which part or all of the features of at least one graphic logo are retained. In this embodiment, the retained features may be different from the detected features. According to the technical solution of this embodiment, when it is detected that the original picture is a picture containing a graphic mark, the cropped target picture is required to contain at least part or all of the technical features of a graphic mark; the graphic mark generally represents a specific meaning, for example, Represents the brand of the product, etc., so retaining the characteristics of the graphic logo can make the cropped target image still reflect a specific meaning.

According to Fig. 7, on the picture of a certain trademark (graphic sign); after the trademark is recognized, when cutting the picture of the trademark, the area where the trademark is located (all features) is cut out, or the outline shape of the trademark is extracted (part feature); furthermore, when there are multiple trademarks of the same kind coexisting in the picture, it can be cropped according to the trademark of only one of the products.

As shown in Figure 8, an embodiment of the present invention provides a device for cropping a picture containing a graphic logo, which includes:

The graphic mark detection module 810 detects the original picture to be cropped, and detects some or all features of one or more graphic marks contained in the original picture.

The size obtaining module 820, obtains the size of the target picture.

The scaling module 830 scales the original picture according to the size of the target picture, so that the size of the original picture does not exceed the size of the target picture. In this embodiment, the size of the original picture does not exceed the size of the target picture, which is beneficial to retain all the features of the original picture.

The cropping module 840 draws a cropped area according to the size of the target picture, copies the image of the original picture into the cropped area, and crops the cropped area to obtain the target picture, so as to retain all the features of all graphic signs in the original picture. According to the technical solution of this embodiment, by zooming the original picture and then cutting it, all the images of the original picture can be preserved, that is, all the features of the graphic mark can be preserved, which is beneficial to fully reflect the meaning of the graphic mark in the cropped picture. Further, when the image of the original picture cannot fill the cropped area, the image of the original picture is centered in the cropped area, which is beneficial to ensure that the cropped picture presents a symmetrical effect.

As shown in Figure 9, an embodiment of the present invention provides a device for cropping a picture containing a graphic logo, which includes:

The graphic mark detection module 910 detects the original picture to be cropped, and detects some or all features of one or more graphic marks contained in the original picture.

The size detection module 920 detects the height and width of the original picture.

The size acquisition module 930 includes the height and width of the original picture.

The scaling module 940 calculates the ratio of the height of the original picture to the height of the target picture, and calculates the ratio of the width of the original picture to the width of the target picture, and uses the maximum value of the obtained ratio as the scaling ratio of the original picture, And scale the original image proportionally. In this embodiment, scaling is actually performed according to the maximum compression ratio. This method can ensure that the size of the original picture is the largest under the premise that the compressed size of the original picture is smaller than the size of the target picture, which is conducive to the clear display of graphics on the target picture. The characteristics of the sign.

The cropping module 950 draws a cropped area according to the size of the target picture, copies the image of the original picture into the cropped area, and crops the cropped area to obtain the target picture, so as to retain all the features of all graphic signs in the original picture.

According to Figure 9, let the original image be recorded as image _src , its width and height are width _src and height _src respectively, and the target image to be cropped is recorded as image _dst , its width and height are width _dst and height _dst respectively, and the units are both pixels. Then the original picture is compressed according to the maximum compression ratio, and the calculation formula of the maximum compression ratio is: max_scale=MAX(width _src /width _dst , height _src /height _dst ). Suppose the image obtained after compression is image _resize , its width and height are respectively width _resize and height _resize , then: width _resize = width _src /max_scale; height _resize = height _src /max_scale.

It should be noted that each of the above formulas is not the only formula for implementing the present invention, and is only used as an implementation manner of the embodiment. Technicians can make appropriate changes to the formula according to business needs, such as adding constants or variables or coefficients, etc., which still fall within the protection scope of the present invention.

As shown in FIG. 10, an embodiment of the present invention provides a device for cropping a picture containing a graphic logo, which includes:

The graphic mark detection module 1010 detects the original picture to be cropped, and detects some or all features of one or more graphic marks contained in the original picture.

The size acquisition module 1020 acquires the size of the target picture.

The scaling module 1030 scales the original picture according to the size of the target picture, so that the size of the original picture does not exceed the size of the target picture. In this embodiment, the size of the original picture does not exceed the size of the target picture, which is beneficial to retain all the features of the original picture.

The cropping module 1040 draws a cropped area according to the size of the target picture, copies the image of the original picture into the cropped area, and crops the cropped area to obtain the target picture, so as to retain all the features of all the graphic signs in the original picture.

The color filling module 1050, when the image of the original picture cannot fill the clipping area, selects the area where the background color to be extracted is located from the original picture according to the edge position of the original picture and performs color extraction. In this embodiment, usually the edge of the original picture containing the graphic logo is the background of the graphic logo.

The color filling module 1050 fills the part of the clipping area that is not filled by the image of the original picture according to the background color of the graphic mark retained in the target picture. According to the technical solution of this embodiment, selecting the background color for filling can make the filled color basically consistent with the edge color of the copied image, and the overall effect is very good.

According to Fig. 10, in combination with the aforementioned embodiment, when copying the pixel value of image _resize to the middle of image _dst , if the size of image _resize is smaller than image _dst , that is, width _resize <width _dst or height _resize <heigth _dst , then the missing The pixels are filled with the background color.

According to the above two embodiments, the original size of the logo picture shown in FIG. 5 is 194x60. Now if you want to obtain a 100x100 picture, you need to process it according to the following process: a) First, detect that the picture is a logo picture, and at the same time determine that the background color is pure white. b) Calculate the maximum compression ratio, max_sacle=MAX(192/100,60/100)=1.92. c) Compress the picture according to the maximum compression ratio, and the length and width of the compressed picture are 100 and 31 respectively. d) Copy the compressed image pixels to the target image at the center, and fill the missing pixels with the background color to obtain the image shown in Figure 6.

The algorithms and displays presented herein are not inherently related to any particular computer, virtual system, or other device. Various generic systems can also be used with the teachings based on this. The structure required to construct such a system is apparent from the above description. Furthermore, the present invention is not specific to any particular programming language. It should be understood that various programming languages can be used to implement the content of the present invention described herein, and the above description of specific languages is for disclosing the best mode of the present invention.

In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure the understanding of this description.

Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, in order to streamline this disclosure and to facilitate an understanding of one or more of the various inventive aspects, various features of the invention are sometimes grouped together in a single embodiment, figure, or its description. This method of disclosure, however, is not to be interpreted as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the Detailed Description are hereby expressly incorporated into this Detailed Description, with each claim standing on its own as a separate embodiment of this invention.

Those skilled in the art can understand that the modules in the device in the embodiment can be adaptively changed and arranged in one or more devices different from the embodiment. Modules or units or components in the embodiments may be combined into one module or unit or component, and furthermore may be divided into a plurality of sub-modules or sub-units or sub-assemblies. All features disclosed in this specification (including accompanying claims, abstract and drawings) and any method or method so disclosed may be used in any combination, except that at least some of such features and/or processes or units are mutually exclusive. All processes or units of equipment are combined. Each feature disclosed in this specification (including accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

Furthermore, those skilled in the art will understand that although some embodiments described herein include some features included in other embodiments but not others, combinations of features from different embodiments are meant to be within the scope of the invention. and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.

The various component embodiments of the present invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art should understand that a microprocessor or a digital signal processor (DSP) can be used in practice to implement some or all of the components in the device for cropping a picture containing a graphic sign according to an embodiment of the present invention Or full functionality. The present invention can also be implemented as an apparatus or an apparatus program (for example, a computer program and a computer program product) for performing a part or all of the methods described herein. Such a program for realizing the present invention may be stored on a computer-readable medium, or may be in the form of one or more signals. Such a signal may be downloaded from an Internet site, or provided on a carrier signal, or provided in any other form.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means can be embodied by one and the same item of hardware. The use of the words first, second, and third, etc. does not indicate any order. These words can be interpreted as names.

Claims (12)

1. A method for cropping a picture comprising a graphic sign, comprising: Detecting the original picture to be cropped, and detecting some or all of the features of one or more graphic signs contained in the original picture; A target picture is obtained by clipping the original picture, in which at least one part or all of the features of the graphic sign is retained. 2. The method according to claim 1, wherein said original picture is cut out to obtain a target picture, specifically comprising: Obtain the size of the target image; Scaling the original picture according to the size of the target picture so that the size of the original picture does not exceed the size of the target picture; Draw a cropped area according to the size of the target picture, copy the image of the original picture into the cropped area, and crop the cropped area to obtain the target picture, so as to retain all the original pictures. All the features of the above-mentioned graphic signs. 3. The method of claim 2, further comprising: Detecting the size of the original picture, including the height and width of the original picture; Obtain the size of the target image, specifically including: Obtain the height and width of the target image; According to the size of the target picture, the original picture is scaled, specifically including: calculating the ratio of the height of the original picture to the height of the target picture, and calculating the ratio of the width of the original picture to the width of the target picture, and using the maximum value of the obtained ratios as a reference to the original The scaling ratio of the picture, and scaling the original picture according to the scaling. 4. The method of claim 2, further comprising: When the image of the original picture cannot fill the cropped area, according to the background color of the graphic sign retained in the target picture, fill the part of the cropped area that is not filled by the image of the original picture . 5. The method according to claim 4, wherein, according to the background color of the graphic sign retained in the target picture, before filling the part not filled by the image of the original picture in the cropping area, Also includes: According to the edge position of the original picture, select the area where the background color is to be extracted from the original picture and perform color extraction. 6. The method according to any one of claims 2 to 5, further comprising: When the image of the original picture cannot fill the cropping area, center the image of the original picture in the cropping area. 7. A device for cropping a picture containing a graphic sign, comprising: A graphical sign detection module, configured to detect the original picture to be cropped, and detect some or all of the features of one or more graphic signs contained in the original picture; A cropping module, configured to crop the original picture to obtain a target picture, in which at least one part or all of the features of the graphic sign is retained. 8. The apparatus of claim 7, further comprising: A size acquisition module, configured to acquire the size of the target image; A scaling module, configured to scale the original picture according to the size of the target picture, so that the size of the original picture does not exceed the size of the target picture; A cropping module, configured to draw a cropped area according to the size of the target picture, copy the image of the original picture into the cropped area, and crop the cropped area to obtain the target picture, so as to retain the Full character of all said graphic signs in the original pictures. 9. The apparatus of claim 8, further comprising: A size detection module, configured to detect the size of the original picture, including the height and width of the original picture; The size acquisition module acquires the height and width of the target picture; The scaling module calculates the ratio of the height of the original picture to the height of the target picture, and calculates the ratio of the width of the original picture to the width of the target picture, and uses the maximum value of the obtained ratios as A scaling ratio for the original picture, and scaling the original picture according to the scaling ratio. 10. The apparatus of claim 8, further comprising: The color filling module, when the image of the original picture cannot fill the clipped area, according to the background color of the graphic sign retained in the target picture, and according to the extracted color, the image in the clipped area is not covered by the The portion of the image that was filled by the original picture is filled. 11. The apparatus of claim 10, wherein, The color filling module selects the area where the background color is to be extracted from the original picture according to the edge position of the original picture and performs color extraction. 12. Apparatus according to any one of claims 8 to 11, wherein, The cropping module places the image of the original picture centered in the cropped area when the image of the original picture cannot fill the cropped area.