JP2000278521A - Image resizing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image resizing device capable of changing plural source image files altogether to the individual conditions of the respective image files in image resizing for changing the size of a source image to be a specified change size. SOLUTION: When object plural source images are specified by a size specifying means 1, an image size extraction means 1 extracts the size of the source images of the respective source image files. Then, by specifying the change size and the arranging position of variable power images to be prepared later by the size specifying means 1, a change size file is prepared. Then, a change parameter preparation means 5 prepares a change parameter file. An image size change means 6 prepares resized images by performing variable magnification and the addition of a margin part to the plural source images corresponding to the change parameter file and stores them in a storage means 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to image resizing for changing the size of an image.
The present invention relates to an image resizing device that can collectively change conditions unique to each image file according to set parameter data.

[0002]

2. Description of the Related Art When image data is handled in a pre-printing process, digital publishing, or the like, the size of the image data to be submitted differs from the size of the image data finally used in a product. Image resizing for changing the size of the image data is performed.

Conventionally, this image resizing operation is performed by an operator opening an image file one point at a time and directly specifying a numerical value using a computer. You can also process multiple image files at once,
In this case, all image files are designated under the same conditions.

[0004]

However, as in the above-mentioned conventional method, in which the image file is opened one by one and the numerical value is directly specified, the operation of opening the file, the operation of specifying the size for each file, The work of converting to the designated size had to be performed, and the processing time was enormous, and the work load of the operator was large. In addition, when processing multiple image files at once, all image files could be resized under the same conditions, but individual image files could be automatically resized under individual conditions. Did not. In view of the above, it is an object of the present invention to provide an image resizing apparatus capable of changing a plurality of image files collectively under conditions unique to each image file.

[0005]

According to the first aspect of the present invention, there is provided an image size extracting means for extracting an image size of each original image from a plurality of original image files, and Size specifying means for specifying a change size for the image, change parameter generating means for generating a change parameter based on the extracted image size and the specified change size, and a plurality of originals according to the generated change parameter. Image resizing means for resizing the image. According to the first aspect of the present invention, in particular, a change parameter is created based on the sizes and change sizes of a plurality of original images, and the original image is scaled according to the change parameters. It is possible to change the magnification at once so that it becomes the largest size that fits in the size.

According to the second aspect of the present invention, there is provided an image size extracting means for extracting the image size of each original image from a plurality of original image files; Size specifying means for specifying a position in the image processing apparatus; change parameter creating means for creating a change parameter based on the extracted image size and the designated change size; and changing a plurality of original images in accordance with the created change parameter. And an image size changing means for creating a resized image by adding a blank portion to the scaled image after creating the scaled image by multiplying. According to the second aspect of the present invention, in particular, a change parameter is created based on the size and the change size of the plurality of original images and the arrangement position of the scaled image, and the original image is scaled according to the change parameter. Is added to generate a resized image, so that each original image can be resized collectively so as to be an image of a designated change size.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (Apparatus Configuration) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an embodiment of an image resizing apparatus according to the present invention. The image resizing device shown in FIG.
It is composed of a size designation unit 1, a storage unit 2, and an arithmetic processing unit 3.

The size specifying means 1 has a function of specifying a change size for each original image file, and is realized by a mouse, a keyboard or the like. The storage unit 2 stores various data such as an original image file, image size data extracted from the original image file by the image size extracting unit 4, changed size data specified by the size specifying unit 1, a resized image obtained by resizing the original image, and the like. Is realized by an external storage device such as a hard disk. The arithmetic processing unit 3 includes an image size extracting unit 4, a change parameter creating unit 5, an image size changing unit 6.
And can be realized by a personal computer, a workstation, or the like. Each unit in the arithmetic processing unit 3 can be realized by installing a dedicated program on a personal computer, a workstation, or the like.

The image size extracting means 4 has a function of extracting the vertical and horizontal image sizes of the original image data from the original image file to create an image size file. The change parameter creating means 5 includes a change size file having a change size for each original image specified by the size specifying means,
It has a function of creating a change parameter file from an image size file. The image size changing means 6 has a function of changing the size of each original image data according to the corresponding change parameter file.

(First Embodiment) Next, the processing operation of the image resizing apparatus shown in FIG. 1 will be described with reference to the flowchart of FIG. First, it is assumed that a plurality of original image files are stored in advance in the storage unit 2 as a previous stage. An original image file is raster image data in addition to raster image data,
This is a file having horizontal size information.

In a state where the original image file is stored, in step S1, the size specifying unit 1 selects an original image file stored in the storage unit 2 whose size is to be changed. Then, when an instruction to extract the image size is given to the arithmetic processing unit 3, the image size extracting means 4 extracts the vertical and horizontal sizes of the original image data from the selected original image file and creates an image size file. I do. FIG. 3A shows an example of the image size file. In FIG. 3A, the leftmost column is the file name of the original image, the central column is the vertical size “Ho” of the original image,
The rightmost column shows the horizontal size “Wo” of the original image. Here, the unit of the vertical and horizontal size of the original image is Pixel
l, that is, the number of pixels. For example, the original image A001
Indicates that the vertical size is 60 pixels and the horizontal size is 40 pixels.

Subsequently, in step S2, the operator uses the size specifying means 1 to specify a change size for each original image to be changed. The designated change size is put together in a change size file format as shown in FIG. In FIG. 3B, the leftmost column is the file name of the original image, the central column is the changed vertical size “Hr”, and the rightmost column is the changed horizontal size “W”.
r ”. Here, the changed vertical size,
The unit of the horizontal size after the change is Pixel, as in the image size file. For example, the original image A001 has a length of 8
This indicates that the size is changed so that it fits in the size of 0 Pixel and 20 Pixels in width.

After the image size file and the change size file are created, in step S3, the change parameter creation means 5 creates a change parameter file based on the two files. FIG. 3C shows a change parameter file created based on the image size file shown in FIG. 3A and the change size file shown in FIG. 3B.
In FIG. 3C, the leftmost column is the file name of the original image, and the middle column is a “change criterion” indicating whether to change the image based on the vertical or horizontal direction when the change is made, and the rightmost column. Is a “reference change value” indicating a change value in the change reference direction. For example, the original image A0
01 is “W” for the “change criterion” and 20 for the “criterion change value”.
Therefore, it is shown that the image is scaled at a fixed aspect ratio so that the horizontal direction becomes 20 pixels.

The method of determining the "change reference" and the "reference change value" of the change parameter file in the change parameter creating means 5 is as follows. FIGS. 4A and 4B respectively show an original image of an image size Ho × Wo and a changed size Hr ×
Wr. At this time, it is necessary to enlarge or reduce the size of the original image so that either the vertical or horizontal size of the original image matches the changed size.

(Condition 1) If Wo / Ho ≦ Wr / Hr, “change reference” = H, “reference change value” = Hr If Wo / Ho> Wr / Hr, “change reference” = W, “reference” "Change value" = Wr

For example, as shown in FIGS. 3A and 3B, in the case of the original image A001, Ho = 60 and Wo = 4.
0, Hr = 80, Wr = 20, Wo / Ho =
40/60, Wr / Hr = 20/80, Wo / H
Since o> Wr / Hr, according to the above (Condition 1), the “change reference” is W, and the “reference change value” is Wr = 20. As a result, a change parameter file as shown in FIG. 3C is obtained. The process of creating the change parameter file is performed for each image file corresponding to the image size file and the change size file.
If there is data that cannot be processed such as “Wr” = − 50 as in the image file A003, the “change reference” and “reference change value” fields of the image file A003 in the change parameter file are displayed. Both are set to "-" indicating that processing is impossible.

Next, in step S4, the image size changing means 6 changes the size of the original image according to the contents of the change parameter file. This is because the image resizing means 6
This is performed by opening the original image files described in the change parameter file one by one and scaling the image in a fixed aspect ratio in accordance with the "change reference" and "reference change value" of the change parameter file. At the time of scaling, the direction of the “change reference” is scaled so as to be the “reference change value”, but for the direction that is not the “change reference”, the “change” is used to maintain the aspect ratio. The magnification is changed at the same magnification as the magnification in the direction of "reference". Here, the original images of FIGS.
FIG. 4C shows a scaled image obtained by using the changed size. For the original image and the changed size shown in FIGS. 4A and 4B, the “change criterion” is W, so the horizontal direction of the scaled image is Wr. Since the horizontal direction is Wr / Wo times the original image, the vertical direction is also Wr / Wo for fixing the aspect ratio.
r / Wo times. As a result, the vertical direction is Ho × Wr / W
It becomes o. For specific processing of scaling the original image, a known method such as a nearest bilinear method or a cubic convolution method can be used. The scaled image obtained by scaling the original image in this way has the largest size that can be fixed at an aspect ratio within the changed size.

This size change processing is performed for each file registered in the change parameter, and stored in the storage means 2.
In step S5, it is checked whether or not all the image files listed in the change parameter file have been completed, and the image is scaled in step S4 until all the image files have been completed. However, when the “change reference” is neither H nor W as in the image A003 shown in FIG. 3C, or when the “reference change value” is inappropriate (other than a positive numerical value), the image file Is skipped without performing scaling processing.
When the processing has been performed for all the image files in the change parameter file, the processing by the present apparatus ends. At this time, a log file indicating the processing contents is output at the same time,
Storing in the storage means 2 is convenient when confirming the processing contents later.

(Second Embodiment) Next, the processing operation of the present apparatus in a second embodiment will be described with reference to the flowchart of FIG.

First, in step S11, as in the first embodiment, the size designation means 1 causes the storage means 2
Is selected from among the original image files stored in. Then, when an instruction to extract the image size is given to the arithmetic processing unit 3, the image size extracting means 4 outputs the vertical and vertical lengths of the original image data from the selected original image file.
Extract the horizontal size and create an image size file.
FIG. 6A shows an example of the image size file. FIG.
The image size file shown in FIG. 3A has the same format as the image size file shown in FIG.

Subsequently, in step S12, the operator uses the size specifying means 1 to determine the position of the changed size and the created scaled image for each original image to be changed in the changed size. specify. The designated change size and the position of the scaled image are shown in FIG.
The format is as follows. The changed size file shown in FIG.
Unlike the one shown in (b), the two columns on the right
Is specific to this embodiment. The second column from the right is
The vertical position “P
h ", the rightmost column shows the horizontal arrangement position" Pw "within the changed size of the scaled image. The arrangement position “Ph” in the vertical direction is T (Top), C (Center
r) and B (Bottom), respectively, indicating that they are located at the upper, middle, and lower positions within the changed size, respectively. The horizontal arrangement position “Pw” is L (Lef
t), C (Center), and R (Right) are taken, and the left part, the center part,
Indicates that it is located on the right. For example, the original image A001
Indicates that the arrangement position “Ph” in the vertical direction is C and the arrangement position “Pw” in the horizontal direction is C, so that the arrangement position is the center in both the vertical direction and the horizontal direction within the changed size. .

After the image size file and the change size file are created, the change parameter creation means 5 creates a change parameter file based on the two files (step S13). FIG. 6C shows a change parameter file created based on the image size file shown in FIG. 6A and the change size file shown in FIG. 6B.
The modified size file shown in FIG. 6C is different from that shown in FIG. 3C, and the two columns on the right are unique to the second embodiment. The second column from the right shows the size of the margin when the resized image is placed at the changed size, and the rightmost column shows the placement position of the image in the vertical or horizontal direction. I have. The “margin size” is determined according to the following (condition 2).

(Condition 2) When "change reference" = W: "margin size" = Hr-Ho
× Wr / Wo “Change standard” = H: “Margin size” = Wr−Wo
× Hr / Ho

For example, as shown in FIG. 4, when the horizontal size of the resized image and the resized image are the same, that is, when the “change standard” = W, the margin is set in the vertical direction. Therefore, the margin size is obtained by subtracting the vertical size of the resized image from the vertical size of the changed size, and the value is apparent from FIGS. 4B and 4C. This is the same as the equation in the upper part of the above (condition 2). When specifically calculated, the original image A001 is Ho
= 60, Wo = 40, Hr = 80, Wr = 20,
Since the change criterion is W, “margin size” = 80−60 × 20/40 = 50 in accordance with the upper equation of (condition 2).

Further, as for the "image position", there is no margin in the direction of the "change reference", so that it is not necessary to consider the arrangement position. Therefore, an arrangement position in a direction different from the “change reference” is required. For example, since the “change criterion” of the original image A002 is H, the value “L” of the horizontal arrangement position “Pw” of the changed size file is registered as the value of the “image position”.

Next, in step S14, the image size changing means 6 scales the original image according to the contents of the change parameter file. This is because the image size changing means 6 opens the original image files described in the change parameter file one by one and changes the size in accordance with the “change criterion” and the “criterion change value” of the change parameter file. Will be When changing the size, "change criteria"
Is scaled so as to be the “changed reference value”, but for the direction that is not the “changed reference”, the magnification is the same as the “changed reference” direction in order to maintain the aspect ratio. It is scaled by the magnification. FIG. 7 shows a state of processing in the case of the original image A001. The original image shown in FIG.
The image is scaled to a scaled image as shown in FIG. For the specific processing of scaling the original image here, similarly to the first embodiment, well-known methods such as the nearest bilinear method and the cubic convolution method can be used.

Subsequently, in step S15, the image size changing means 6 adds a margin portion to the resized image according to the "margin size" and "image position" of the change parameter file. In the case of the original image A001, since the “change criterion” is W from the change parameter file shown in FIG. 6C, a margin is added in the vertical direction. Further, since the “image position” is C, the image is arranged at the center, and thus the margin is added to the top and bottom. Since the margin size is “50”, 1
/ 2. As a result, a resized image is created in which 25 margins are added above and below the scaled image. FIG. 7D shows the created resized image.

Here, an example will be given of the relationship between the image position of the change parameter file and the created resized image. For example, in the image A001, when the image position is T and other conditions are the same, a resized image in a state as shown in FIG. 8A, the image position is B and the other conditions are the same Means that a resized image in a state as shown in FIG. 8B is obtained. FIGS. 8C, 8D, and 8E show the states of the resized images when the image position becomes L, C, and R when the change reference is H in the image A001.

The processing of steps S14 and S15 by the image size changing means 6 is performed for each file registered in the change parameter file, and stored in the storage means 2. In step S16, it is checked whether or not all the image files listed in the change parameter file have been completed, and the processes in steps S15 and S16 are performed until all the image files are completed. As in the first embodiment, if there is an image file that cannot be processed, the image file is skipped and another image file is processed. When the processing has been performed for all the image files in the change parameter file, the processing by the present apparatus ends. At this time, as in the first embodiment,
A log file indicating the processing content is output and stored in the storage unit 2.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications are possible. For example, in the above embodiment, both the resized image created in the first embodiment and the resized image created in the second embodiment are stored one file at a time in the storage unit 2 such as a hard disk. Alternatively, the data may be stored in the memory of the arithmetic processing unit 3 and may be stored in the storage unit 2 when the processing of all the files is completed. Further, in the above embodiment, for the scaling process of the original image, the nearest bilinear method, the cubic convolution method, etc. are used, but the present invention is not limited to this, and if the scaling can be performed with a fixed aspect ratio, Other methods may be used.

[0031]

As described above, according to the present invention,
A change parameter is created based on the size and the change size of a plurality of original images, and the original image is scaled according to the change parameters. It becomes possible to change the magnification. In addition, a change parameter is created based on the size of the plurality of original images, the changed size, and the arrangement position of the scaled image. After scaling the original image according to the changed parameters, a margin is added to create a resized image. As a result, each original image can be resized collectively so as to become an image of the designated change size.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of an image resizing device of the present invention.

FIG. 2 is a flowchart illustrating a processing operation according to the first embodiment of the present invention.

FIG. 3 is a diagram showing files processed in the first embodiment of the present invention.

FIG. 4 is a diagram illustrating a state of an image processed in the first embodiment of the present invention.

FIG. 5 is a flowchart illustrating a processing operation according to the second embodiment of the present invention.

FIG. 6 is a diagram showing a file processed in the second embodiment of the present invention.

FIG. 7 is a diagram illustrating a state of an image processed in a second embodiment of the present invention.

FIG. 8 is a diagram illustrating a relationship between an image position parameter and a resized image according to the second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Size designation means 2 ... Storage means 3 ... Arithmetic processing unit 4 ... Image size extraction means 5 ... Change parameter creation means 6 ... Image size change means

Claims (2)

[Claims] An image size extracting unit for extracting an image size of each original image from a plurality of original image files; a size designating unit for designating a change size for each of the original images; An image resize comprising: a change parameter creating unit that creates a change parameter based on the designated change size; and an image size changing unit that scales a plurality of original images according to the created change parameter. apparatus. 2. An image size extracting means for extracting an image size of each original image from a plurality of original image files, and a size designation for designating a change size and a position on the change size of the scaled image for each of the original images. Means, a change parameter creating means for creating a change parameter based on the extracted image size and the designated change size, and a scaled image by scaling a plurality of original images according to the created change parameter. An image resizing device comprising: an image resizing unit that creates a resized image by adding a margin to the resized image after the image is created.