KR900005068Y1 - Apparatus for enlarging/reducing image - Google Patents

Abstract

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Description

Phase expansion and contraction device

1 is a block diagram showing an embodiment of an image magnification reduction device according to the present invention.

2 is an explanatory diagram showing an example of an original storage area and a scaling image storage area in the upper memory 2;

3 is a diagram for explaining a floating point.

4 is an explanatory diagram showing a floating point for two examples.

5 is an explanatory diagram showing an example of a reduction operation in the embodiment of FIG.

6 is an explanatory diagram showing an example of an enlargement operation of the embodiment of FIG.

FIG. 7 is an explanatory diagram showing an example of an image obtained by enlargement or reduction according to the embodiment of FIG.

8 and 9 are explanatory views showing examples of enlargement and reduction operations when the storage capacity of the buffer 4 cannot accommodate one row of the original image storage area.

* Explanation of symbols for main parts of the drawings

2: upper memory 4: buffer

6: enlarger and reducer 8: arithmetic unit

10: controller

The present invention relates to an enlargement and reduction apparatus for images such as letters and figures.

Conventionally, in order to enlarge or reduce one original image, one original image stored in the memory is divided into a plurality of upper portions, and the upper portion thereof is sequentially enlarged or reduced to record an image in which the original image is stored. In the reduction apparatus, in order to avoid the risk that the upper portion which is not enlarged or reduced yet is stored in the memory of the enlarged image or reduced image (hereinafter, collectively referred to as "scaling image") and destroyed, the original image and the scaling image Since the memory area is set differently, a large memory capacity is required for the image, and the image area cannot be freely set.

Accordingly, the present invention is to solve the above-mentioned problems, and even if the original image and the storage region of the scaling image overlap, the unprocessed portion of the original image, that is, the upper portion which does not enlarge or reduce can be enlarged or reduced without destroying the image. It is therefore an object of the present invention to provide an image enlargement / reduction device capable of freely setting the above area, since many memories are unnecessary.

The present invention is based on the positional relationship between the original image storage area and the scaling image storage area of the memory, and an operation unit for obtaining a floating point for dividing the original image storage area and the scaling image storage area by the same ratio, and when receiving an enlargement command. The upper portion is sequentially read from the original image storage auxiliary region (the memory region obtained by dividing the original image storage region into a plurality of portions) farther away from the floating point, and the scaling image storage auxiliary region (scaling phase memory) farther from the floating point. The enlarged image portions are recorded in order from a plurality of storage regions divided into a plurality of regions, and when the reduction command is received, the upper portions are sequentially read from the original storage auxiliary region closer to the floating point. Recording of thumbnail parts in order from the near-scaling upper memory area Provided with a control apparatus for performing, to achieve the above object.

In the image enlargement / reduction device according to the present invention, at the time of image enlargement, the upper portion is sequentially read from the original image storage area farther from the floating point, the read upper portion is stored in the buffer, and The upper portion is enlarged, the enlarged portion is sequentially recorded from the scaling up image storage area farther from the floating point, and at the time of image reduction, the upper portion is sequentially moved from the original image storage area closer to the floating point. Is read out, the read image is stored in a buffer, the upper portion is reduced by an enlarged reducer, and the reduced image portion is sequentially written from the scaling image storage auxiliary area closer to the floating point.

1 shows one embodiment of the image enlargement and reduction apparatus according to the present invention. In the figure, the image memory 2 is a memory for storing an original image and a scaling image obtained by enlarging or reducing the original image.

The original image storage area for storing the original image is composed of a plurality of original image storage auxiliary areas. As shown in FIG. 2, one original image storage area S is composed of eight memory rows R1 to R8, for example, in the case of reduction, and four memory rows H1 to H4 for the expansion. It consists of. The scaling image storage area for storing the scaling image is composed of a plurality of scaling image storage auxiliary areas. As shown in FIG. 2, one scaling image storage area D is composed of, for example, four memory rows H1 to H4 in the case of reduction, and eight memory rows in the case of enlargement. . The original image storage area S and the scaling image storage area D can be set to overlap.

The buffer 4 is a buffer for storing rows read from the area designated by the control device 10 in the storage area of the upper memory 2, and has a storage capacity of, for example, two rows of the upper memory. The magnification reducer 6 enlarges or reduces the upper portion stored in the buffer 4 in accordance with the magnification command or the reduction command given from the control device 10 and the magnification reduction ratio. The enlarged image portion or the reduced image portion is recorded in the designated area in the storage area of the upper memory 2 by the control device 10.

The arithmetic unit 8 is a device which obtains the floating point RP which divides two areas by the same ratio from the positional relationship between the original image storage area S and the scaling image storage area D of the upper memory 2. 3 is for explaining the floating point RP. The floating point RP is a floating line AA "which divides the original image storage area S and the scaling image storage area D by the same ratio in the vertical direction, and a floating line BB which divides the two regions by the same ratio in the horizontal direction. The computing device 8 sets the coordinates of the lower left end of the scaling image storage area D as (X _D , Y _D ) with the origin of the lower left end of the original upper storage area S as the origin. , The enlargement / reduction ratio is n, and the Y coordinate Y _R of the floating point RF is

To obtain the solution (y _C ) and obtain the X coordinate (X) of the floating point (RP)

Obtain (X _P ) of.

For example, as shown in FIG. 4A, the image of the original image storage area S consisting of eight memory rows is reduced to 1/2 each in the horizontal direction and the vertical direction, and the lowest end of the area S is shown. In the case where the coordinate is stored in the scaling upper memory area D consisting of four memory rows having the lower left coordinates of (2, 3) when the coordinate is the origin,

And

By calculating, it can be seen that the coordinate of the floating point RF is (4,6).

As shown in FIG. 4B, the image of the original image storage area S consisting of four memory rows is doubled in the horizontal direction and the vertical direction, respectively, and the coordinates of the lower left end of the area S are returned to the origin. Is stored in the scaling image storage area D consisting of eight memory rows having the coordinates (-2,3) at the bottom left,

By controlling this, it can be seen that the coordinate of the floating point RF is (2, 3).

When the control device 10 receives an enlarged command from the outside, the controller 10 sequentially moves from the original image storage area farther from the floating point RP (in the example of FIG. 2, in the order of memory return H1 to H2 and from H4 to H3). The memory 2 is read in the order of, and in order from the scaling-up storage auxiliary area farther from the floating point RP (in the example of FIG. 2, the memory rows R1, R2, R3, R4). The magnified image portion is written to the memory 2 in the order of the memory rows R8, R7, R6, and R5, and in order from the original upper memory storage area closer to the floating point RP when a reduction command is received from the outside. (In the example of FIG. 2, the memory rows R4, R3, R2, and R1 or the memory rows R5, R6, R7, and R8 are read in order.) The memory 2 is read and the one closer to the floating point RP is read. In order from the scaling phase storage area (in the example of FIG. 2, The reduced-size image is written to the memory 2 in the order from the memory row H2 to the memory row H1 or from the memory row H3 to the memory row H4.

Next, the operation of the embodiment of the image enlargement and reduction apparatus according to the present invention constructed as described above will be described. The image of the original image storage area S consisting of eight memory rows R1 to R8 is now reduced to 1/2 in the horizontal direction and the vertical direction, respectively, and is made up of four memory rows, and the center is the original image storage area S. The case where the reduced image is recorded in the scaling image storage area D coinciding with the center of X) will be described as an example. First, the computing device 8 calculates the simultaneous equations (1) and (2), and finds that the floating point RF is the center of the regions S and D, and accordingly, The controller 10 first outputs the upper portion stored in the memory row R3 and the memory row R4 closest to the floating point of the memory 2 to the buffer 4. In addition, the control device 10 is provided with a reduction command and a reduction ratio (1/2 in the horizontal direction and the vertical direction in this example) to the enlarger 6, and is geared to the buffer 4 of the enlarger 6 The upper portion is reduced according to the above ratio. Next, the control apparatus 10 designates memory return H2 close to a floating point, and stores the reduced upper portion from the enlarged reducer 6 therein. This operation is illustrated in FIG. Since the original upper portion that has already been reduced has been stored in the area of the memory return H2, the original upper portion that has not been reduced yet does not be destroyed.

Next, the controller 10 outputs the image stored in the memory rows R2 and R1 of the memory 2 to the buffer 4.

In the same manner as described above, the enlarged reducer 6 is reduced to store the enlarged upper portion in the memory transfer H1 of the memory 2.

This operation is shown in FIG. 5B. Since the area of the memory return H1 is also an area in which the original image that has already been reduced has been stored, the original image that has not been reduced yet is not destroyed. The original upper portion stored in the remaining memories R5 to R8 is similarly reduced and stored in the memory transfers H3 and H4. Thus, for example, if the character "J" is stored in the original image storage region S, as shown in Fig. 7A, the scaling image storage region (S) overlapping with the original image storage region S ( It is memorized in D).

Next, the image of the original image storage area S consisting of four memory rows H1 to H4 is doubled in the horizontal direction and the vertical direction, respectively, and is composed of eight memory rows R1 to R8 and the center is the original image memory. The operation of the above-described embodiment will be described, for example, when the enlarged image is recorded in the scaling image storage area D coincident with the center of the region S. FIG. The computing device 8 calculates the simultaneous equations (1) and (2) above, and finds that the floating point RF is the center of the regions S and D. In response to this, the controller 10 first outputs the upper portion stored in the memory line H1 farthest from the floating point RF of the memory 2 to the buffer 4. Then, the control device 10 provides the enlargement reducer 6 with an enlargement command and an enlargement ratio (2 in the horizontal and vertical directions, respectively) in the upper portion stored in the buffer 4 of the enlarger. Is enlarged according to the above ratio. Next, the control device 10 designates the memory rows R1 and R2 furthest from the floating point, and stores the enlarged image portion from the zoom reducer 6 therein.

This operation is shown in Figure 6a. Since the regions of the memory rows R1 and R2 are regions in which the original upper portion is not stored, the unprocessed original upper portion is not destroyed.

Next, the controller 10 outputs the image stored in the memory transfer H2 of the memory 2 to the buffer 4.

In the form as described above, the enlargement and reduction unit 6 enlarges the enlarged image and stores the enlarged image in the memory rows R3 and R4 of the memory 2. This operation is shown in FIG. 6B.

The memory row R4 overlaps with the memory row H2, but since the original upper portion stored in the memory row H2 is already used for the enlargement process, the original upper portion not used for the enlargement process is not destroyed.

The original upper portion stored in the remaining memory lines H3 and H4 is also expanded in the same manner and stored in the memory lines R4 to R7. Thus, for example, if the character "J" is stored in the original image storage area S, as shown in Fig. 7B, the scaling image storage area (S) overlapping with the original image storage area S ( It is enlarged and stored in D).

In the above example, the upper portion of one row of the original image storage area S can be collectively pulled out to the buffer 4, but the storage capacity of the buffer 4 is small so that 1 of the original image storage area S is reduced. If you can't accommodate the line breaks, you can do this:

That is, each row of the original image storage area S is divided into a plurality, so that the storage capacity of one area is accommodated in the storage capacity of the buffer 4, and in the case of enlargement, the original image storage area S is firstly expanded. As shown in FIG. 8 for the row 100 furthest from the floating line AA 'of Fig. 8, the image is enlarged for each partition in order from the partition 102 furthest from the floating line BB of the row. After the processing is performed (the number in the divided area in FIG. 8 indicates the processing procedure) and the process of expanding the farthest line is finished, the process of enlargement is performed in the same manner as above for the next line closest to the floating line AA 'from the farthest line. You can also do

The arrow in FIG. 8 shows the processing sequence. In the case of reduction, first, the divided region closest to the floating line BB of the row as shown in FIG. 9 for the row 110 closest to the floating line AA 'of the original image storage area S is shown. Reduction processing is performed for each divided area in order from (112) (the number in the divided area in FIG. 9 indicates the processing order). After the reduction processing of the closest row is finished, the next line is moved from the next row to the floating line AA '. The reduction processing as described above may be performed in order of the farthest line.

Arrows in FIG. 9 show the processing sequence.

In the above embodiment, the original image storage region and the scaling image storage region are rectangular, but even if the storage region is a two-dimensional closed region other than the square, the floating point can be reduced and enlarged without destroying the unprocessed original image. Of course it can.

As apparent from the above description, the present invention obtains a floating point for dividing the original image storage region and the scaling image storage region by the same ratio, and in the case of enlargement, sequentially in the direction from the floating point of the original image storage region to the next farther region. The upper portion is read out and the sequential enlarged image portion is recorded in an area next to the next area far from the floating point of the scaling image storage area, and in the case of reduction, from the next area from the area close to the floating point of the original image storage area. Since the upper part is read in the distant direction and the reduced parts are sequentially recorded in the next area far from the next closest to the floating point of the scaling image memory area, even if the original image storage area and the scaling image memory area overlap. Destroy the iconic part You can zoom in or out without a problem. Therefore, a large amount of memory becomes unnecessary and is particularly effective for a personal computer. In addition, since the image area can be set freely, the use efficiency of the memory is also improved.

Claims (1)

The original image storage region S for storing the original image is composed of a plurality of original image storage auxiliary regions, and the scaling image storage region D for storing the scaling image obtained by enlarging or reducing the original image includes a plurality of scaling images. A memory 2 configured as a storage auxiliary area, wherein the original image storage area and the scaling image storage area are set as an arbitrary positional relationship in which at least a part of them overlap, and a buffer for temporarily storing an upper portion read from the memory ( 4) and an image enlarger 6 which enlarges and outputs the upper portion stored in the buffer upon receiving an enlargement command, and reduces and outputs when receiving a reduction command, the original image storage area of the memory, and Based on the positional relationship with the scaling image storage region, the original image storage region is equal to the scaling image storage region. Reads the upper portion in order from the arithmetic unit 8 for obtaining the floating point RP divided by the ratio, and the original image storage area farthest from the floating point when the magnification command is received, and from the floating point. The magnified image portions are recorded in order from the remote scaling image storage area, and when the reduction command is received, the upper portions are sequentially read from the original image storage area closer to the floating point, and the upper portion is closer to the floating point. And a control device (10) for causing recording of the reduced image portions in order from the scaling image storage auxiliary area.