JP2007020235A - Method, apparatus and program for image reproduction - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate an unpleasant sensation caused by an output image in the vertical direction when an input image is standardized in the case that lengthwise directions of the input image and the output image are different. <P>SOLUTION: An input image data S0 showing the input image obtained in a reading means 1 is input in a standardizing means 2. In a judging means 5 of the standardizing means 2, it is judged whether the lengthwise directions of the input image and an output size accord or not. If they do not accord each other, aspect ratios of the input image and the output size are reconciled by changing the aspect ratio of the output size in a changing means 6. Then, the output image is obtained by magnifying the input image so as to accommodate to the output size in a magnifying means 7. An output image data S1 showing the output image is recorded in recording media such as a CD-R or the like in a recording means 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an image reproducing method and apparatus for obtaining an output image by converting the size of an input image to a predetermined size, and a computer-readable recording in which a program for causing a computer to execute the image reproducing method is recorded. It relates to the medium.

  Digital image data acquired by a digital electronic still camera (hereinafter referred to as a digital camera) or digital image data obtained by reading an image recorded on a film as a hard copy such as a print or as a soft copy on a display A reproducible image processing system has been proposed. In such an image processing system, digital image data is recorded on a recording medium such as a CD-R and provided. As described above, when digital image data is reproduced, an image is output after various image processing such as gradation processing and color conversion processing is performed on the image data.

  In such an image processing system, when image data is output as a print, the recording area defined by the print paper is shown in FIG. 16A, and the input image represented by the image data is shown in FIG. In the case shown in b), the longitudinal direction differs between the output region and the input image. In such a case, if print output is performed, the image does not fit in the recording area as shown in FIG. 16C, and the entire area of the input image cannot be recorded on the printing paper.

For this reason, a method is proposed in which the longitudinal direction of the input image is compared with the longitudinal direction of the recording area, and if they are different, the input image is rotated and printed so that the longitudinal directions are aligned. (See Patent Document 1). As described above, when an image is recorded on a print sheet, a correct image in the vertical direction can be observed by rotating the print sheet even if the input image is rotated.
Japanese Patent Application No. 10-252718

  On the other hand, when image data is recorded on a recording medium such as a CD-R or stored in a database, in order to easily manage the image data, the input image represented by the image data has a certain size. And standardized so that the longitudinal direction is aligned. Here, when the longitudinal direction of the normalized output image is different from the longitudinal direction of the input image, the output image may be obtained by rotating the input image so that the longitudinal directions are aligned. However, unlike the case of printing an image, when the output image data obtained by rotating the input image data is reproduced on the monitor, the top-to-bottom direction of the image is different from the input image, and the image becomes uncomfortable. That is, when the input image is an image whose longitudinal direction is vertical as shown in FIG. 17A, when the normalized output image obtained by rotating the input image is reproduced, as shown in FIG. 17B. The longitudinal direction becomes the horizontal direction, and the top and bottom directions of the input image and the output image are different.

  The present invention has been made in view of the above circumstances, and provides an image reproduction method and apparatus capable of standardizing and reproducing an input image without a sense of incongruity, and a computer-readable recording medium on which a program for causing a computer to execute the image reproduction method is recorded. It is intended to provide.

A first image normalization method according to the present invention converts input image data representing an input image having a predetermined aspect ratio into output image data representing an output image having a predetermined aspect ratio and a predetermined output size. In the image normalization method,
Comparing the longitudinal direction of the input image with the longitudinal direction of the output image;
When the longitudinal direction of the input image and the longitudinal direction of the output image are different, the aspect ratio of the output size is changed so that the longitudinal directions are aligned,
The output image data is obtained by enlarging or reducing the input image data so as to be a size suitable for the output size.

The second image normalization method according to the present invention converts input image data representing an input image having a predetermined aspect ratio into output image data representing an output image having a predetermined aspect ratio and a predetermined output size. In the image normalization method,
Comparing the longitudinal direction of the input image with the longitudinal direction of the output image;
When the longitudinal direction of the input image is different from the longitudinal direction of the output image, the input image is rotated so that the longitudinal directions are aligned,
Obtaining the output image data by scaling the rotated input image data to a size that matches the output size;
Rotation information indicating that the input image has been rotated is added to the output image data.

An image reproduction method according to the present invention is an output obtained by converting input image data representing an input image having a predetermined aspect ratio to represent an output image having a predetermined aspect ratio and a predetermined output size. In an image reproduction method for reproducing image data,
The longitudinal direction of the input image and the longitudinal direction of the output image are compared. When the longitudinal direction of the input image and the longitudinal direction of the output image are different, the input image is rotated so that the longitudinal directions are aligned. The output image data obtained by enlarging and reducing the rotated input image data so as to be a size suitable for the output size, and adding rotation information indicating that the input image is further rotated, Referring to the rotation information, the output image data is rotated in a direction opposite to the direction in which the input image is rotated,
The output image data rotated in the reverse direction is reproduced.

  Here, “enlargement / reduction” includes enlarging / reducing at a magnification of 1 ×.

  In addition, the “size suitable for the output size” includes not only the output size itself but also a size obtained by changing the output size. For example, when the aspect ratio of the input image is different from that of the output size, this includes changing the aspect ratio of the output size to the same size as the aspect ratio of the input image. Note that if the input image and the output size have different aspect ratios, if the input image is scaled without changing the output size aspect ratio, the scaled input image may protrude from the output size depending on the scale factor. On the other hand, a portion that is insufficient for the output size occurs. In such a case, the aspect ratio of the output size may be changed as described above, but the output image may be changed by clipping a portion that protrudes from the output size or by whitening a portion that is not sufficient for the output size. You may create it.

The first image normalization apparatus according to the present invention converts input image data representing an input image having a predetermined aspect ratio into output image data representing an output image having a predetermined aspect ratio and a predetermined output size. In the image normalization device,
Comparison means for comparing the longitudinal direction of the input image with the longitudinal direction of the output image;
When the longitudinal direction of the input image is different from the longitudinal direction of the output image, changing means for switching the aspect ratio of the output size so that the respective longitudinal directions are aligned,
The image processing apparatus includes an enlargement unit that enlarges and reduces the input image data to obtain the output image data so that the output image size matches the output size.

The second image normalization apparatus according to the present invention converts input image data representing an input image having a predetermined aspect ratio into output image data representing an output image having a predetermined aspect ratio and a predetermined output size. In the image normalization device,
Comparison means for comparing the longitudinal direction of the input image with the longitudinal direction of the output image;
When the longitudinal direction of the input image and the longitudinal direction of the output image are different from each other, rotating means for rotating the input image so that the longitudinal directions are aligned,
Enlarging means for enlarging and reducing the rotated input image data to obtain a size suitable for the output size to obtain the output image data;
The image processing apparatus includes an adding unit that adds rotation information indicating that the input image is rotated to the output image data.

An image reproduction apparatus according to the present invention provides an output obtained by converting input image data representing an input image having a predetermined aspect ratio so as to represent an output image having a predetermined aspect ratio and a predetermined output size. In an image playback device for playing back image data,
Comparing means for comparing the longitudinal direction of the input image and the longitudinal direction of the output image, and when the longitudinal direction of the input image and the longitudinal direction of the output image are different, the input so that the longitudinal directions are aligned. Rotating means for rotating the image, enlarging means for obtaining the output image data by enlarging / reducing the rotated input image data so as to be a size suitable for the output size, and rotation indicating that the input image has been rotated With respect to the output image data obtained by the image normalization device provided with an adding means for adding information to the output image data, the output image data is reversed with respect to the rotation direction of the input image with reference to the rotation information. Rotating means rotating in the direction;
Reproducing means for reproducing the output image data rotated in the reverse direction is provided.

  The image normalization method and the image reproduction method according to the present invention may be provided by being recorded on a computer-readable recording medium as a program for causing a computer to execute the image normalization method.

  According to the first image normalization method and apparatus of the present invention, when the longitudinal direction of the input image and the output size is different, the aspect ratio of the output size is switched, and the input is made so that the size is suitable for the output size. The image data is enlarged and reduced to obtain output image data. For this reason, the input image is not rotated, and when the input image is standardized, it is possible to prevent the top and bottom direction of the input image from being changed and an output image having an uncomfortable feeling.

  Further, according to the second image normalization method and apparatus of the present invention, the input image is rotated when the longitudinal direction of the input image and the output size are different, and further rotated so as to be a size suitable for the output size. The input image data is enlarged / reduced to obtain output image data, and rotation information indicating that the input image has been rotated is added to the output image data. For this reason, although the input image is rotated at the time of normalization, rotation information is added. Therefore, by referring to this rotation information when reproducing the output image, the top and bottom direction of the output image can be determined. Thus, when the input image is standardized, it is possible to prevent the input image from changing the top-and-bottom direction and generating an uncomfortable output image.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a schematic block diagram showing the configuration of an image normalization apparatus according to the first embodiment of the present invention. As shown in FIG. 1, the image normalization apparatus according to the first embodiment performs a normalization process on input image data S0 imaged by a digital camera or read by a scanner, and outputs output image data S1. The reading means 1 for reading the input image data S0 from the medium in which the input image data S0 is recorded or reading the input image data S0 transferred via the network, and the read input image data S0. A normalization unit 2 that obtains output image data S1 by performing normalization processing, and a recording unit 3 that records the output image data S1 on a recording medium such as a CD-R or stores it in an image database. In this embodiment, the input image data S0 represents a vertically long input image of 300 × 400 pixels as shown in FIG. 2A, and the output image size (hereinafter referred to as output size) is shown in FIG. As shown in b), the landscape size is 1200 × 800 pixels.

  The normalizing means 2 compares the longitudinal direction of the input image represented by the input image data S1 with the longitudinal direction of the output size, and judges whether or not the longitudinal directions match, When the determination means 5 determines that the longitudinal direction of the input image and the output size are different, the changing means 6 for changing the aspect ratio of the output size, and the enlargement means for enlarging the input image to match the output size 7.

  Next, the operation of the first embodiment will be described. FIG. 3 is a flowchart showing the operation of the first embodiment. As shown in FIG. 3, first, the input image data S0 is read by the reading means 1 and input to the normalizing means 2 (step S1). In the normalizing means 2, it is judged in the judging means 5 whether or not the longitudinal direction of the input image matches the longitudinal direction of the output size (step S2). As shown in FIGS. 2A and 2B, if the longitudinal direction of the input image and the output size do not match, step S2 is negated and the aspect ratio of the output size is changed by the changing means 6 (step S2). S3). As a result, as shown in FIG. 4A, the output size of 1200 × 800 pixels is changed to 800 × 1200 pixels.

  When the aspect ratio of the output size is changed in this way, the enlargement unit 7 enlarges the input image so as to match the changed output size (step S4). For example, since the size of the input image is 300 × 400 pixels and the output size after the change is 800 × 1200 pixels, the input image is tripled to 900 × 1200 pixels as shown in FIG. 4B. It is an enlarged image. Here, the size of the enlarged image is 900 × 1200 pixels, the changed output size is 800 × 1200 pixels, and the aspect ratios are different. For this reason, in the first embodiment, as shown in FIG. 4C, the region for 50 pixels on the left and right in the enlarged image is clipped (step S5) to create an enlarged image of 800 × 1200 pixels. Is the output image. Then, the output image data S1 representing the output image created in this way is recorded on the CD-R in the recording means 3 or stored in the image database (step S6), and the process is terminated.

  When the longitudinal direction of the input image and the output size coincide with each other and step S2 is affirmed, the process proceeds to step S4, and processing from step S4 to step S6 is performed to obtain output image data S1.

  As described above, in the first embodiment, when the longitudinal directions of the input image and the output size are different, the aspect ratio of the output size is changed, and the input image data S0 is changed so as to conform to the changed output size. Since the output image data S1 is obtained by enlarging the input image, the input image is not rotated. Accordingly, when normalizing the input image, the top-and-bottom direction of the input image is changed and the output image has a sense of incongruity. Can be prevented.

  In the first embodiment, the left and right areas of the enlarged image are clipped to match the output size after enlarging the input image. However, after the input image is enlarged to 900 × 1200 pixels, this enlargement is performed. Compared with the image size and the output size, the output size may be changed so that the output size matches the size of the enlarged image. For example, since the output size is 800 × 1200 pixels in the first embodiment, the output size may be changed to 900 × 1200 pixels as shown in FIG. As a result, the output image is an enlarged image itself obtained by enlarging the input image three times as shown in FIG.

  In this case, the output size may be changed to 900 × 1350 pixels as shown in FIG. 6A without changing the aspect ratio of the output size. When the output size is changed to 900 × 1350 pixels in this way, the output image has margins in the vertical direction as shown in FIG. 6B.

  Further, when the input image is enlarged, the enlargement ratio may be changed so as not to exceed the output size. For example, in the first embodiment, since the output size is 800 × 1200 pixels, as shown in FIG. 7A, if the input image is enlarged 8/3 times, the size of the enlarged image is 800 × 400. -It becomes 8/3 pixels, and the enlarged image will not exceed the output size. In this case, since the output size is not changed, as shown in FIG. 7B, margins are generated in the upper and lower sides of the output image. In this case, the output size is changed from 800 × 1200 pixels to 800 × 400 · 8/3 pixels as shown in FIG. 8A, and an output image without a margin is obtained as shown in FIG. 8B. You may do it.

  Next, a second embodiment of the present invention will be described. FIG. 9 is a schematic block diagram showing the configuration of the normalizing means 2 ′ in the second embodiment of the present invention. In the second embodiment, the reading unit and the recording unit are the same as the reading unit 1 and the recording unit 3 of the first embodiment, and a detailed description thereof is omitted here. As shown in FIG. 9, the normalization unit according to the second embodiment determines that the determination unit 5 is the same as that of the first embodiment, and that the determination unit 5 determines that the input image and the output size are different in the longitudinal direction. The rotation means 8 for rotating the input image in a predetermined direction, the enlargement means 9 for enlarging the rotated input image to match the output size, and the fact that the input image has been rotated to the output image data S1. Providing means 10 for assigning a property to be represented.

  Here, for example, when the input image is rotated 90 degrees clockwise, the property added to the output image data S1 by the adding unit 10 is returned to the direction of the original input image if the input image is rotated 90 degrees counterclockwise. Thus, the information “90 degrees counterclockwise” is represented.

  Next, the operation of the second embodiment will be described. FIG. 10 is a flowchart showing the operation of the second embodiment. As shown in FIG. 10, first, the input image data S0 is read by the reading means 1 and inputted to the normalizing means 2 '(step S11). In the normalizing means 2, the judging means 5 judges whether or not the longitudinal direction of the input image matches the longitudinal direction of the output size (step S12). As shown in FIGS. 2 (a) and 2 (b), if the longitudinal direction of the input image and the output size do not match, step S12 is denied and the input image is rotated by the rotating means 8 (step S13). . When the input image is thus rotated, the enlarged input image is enlarged by the enlargement unit 9 so as to match the output size (step S14).

  For example, since the size of the input image is 300 × 400 pixels and the output size is 800 × 1200 pixels, the input image is first rotated 90 degrees clockwise as shown in FIG. The rotated input image is tripled to obtain an enlarged image of 1200 × 900 pixels. Here, the size of the enlarged image is 1200 × 900 pixels, the output size is 1200 × 800 pixels, and the aspect ratios are different. For this reason, in the second embodiment, as shown in FIG. 11B, the upper and lower 50 pixel regions in the enlarged image are clipped (step S15) to create an enlarged image of 1200 × 800 pixels. Is the output image.

  When a magnified image of 1200 × 800 pixels is created in this way, the input image is rotated 90 degrees clockwise, which is necessary to match the longitudinal direction of the output image with the longitudinal direction of the input image. A property of “90 degrees counterclockwise” as information is added to the output image data S1 representing the output image (step S16). The output image data S1 to which the property is given is recorded on the CD-R in the recording means 3 or stored in the image database (step S17), and the process is terminated.

  When the longitudinal direction of the input image and the output size coincide with each other and step S12 is affirmed, the process proceeds to step S14, and the processing from step S4 to step S17 is performed to obtain the output image data S1. In this case, in step S16, a property indicating that the input image is not rotated is given to the output image data S1, but this property may not be given to the output image data S1.

  As described above, in the second embodiment, when the longitudinal direction of the input image and the output size is different, the input image is rotated, and the rotated input image is further enlarged to match the output size. Since the data S1 is obtained and the property indicating that the input image is rotated is added to the output image data S1, the input image is rotated during normalization, but this property is set when the output image data S1 is reproduced. By referencing, the top-to-bottom direction of the output image can be matched with the top-to-bottom direction of the input image, and when the input image is normalized, the top-to-bottom direction of the input image is changed and Can be prevented.

  In the second embodiment, the reproducing means for reproducing the output image data S1 reads out the property assigned to the output image data S1, and rotates the output image data S1 and reproduces it if necessary based on this. Is.

  In the second embodiment, after the input image after rotation is enlarged, the upper and lower areas of the enlarged image are clipped to match the output size, but after the input image after rotation is enlarged to 1200 × 900 pixels The output size may be changed so that the output size matches the size of the enlarged image as compared with the size of the enlarged image and the output size. For example, since the output size is 1200 × 800 pixels in the second embodiment, the output size may be changed to 1200 × 900 pixels as shown in FIG. As a result, the output image becomes an enlarged image itself obtained by enlarging the input image after rotation as shown in FIG.

  In this case, the output size may be changed to 1350 × 900 pixels as shown in FIG. 13A without changing the aspect ratio of the output size. Thus, when the output size is changed to 1350 × 900 pixels, the output image has left and right margins as shown in FIG.

  Further, when the input image after rotation is enlarged, the enlargement ratio may be changed so as not to exceed the output size. For example, in the second embodiment, since the output size is 1200 × 800 pixels, as shown in FIG. 14A, if the input image is enlarged 8/3 times, the size of the enlarged image is 400 · 8. / 3 × 800 pixels, and the enlarged image does not exceed the output size. In this case, since the output size is not changed, the output image has margins on the left and right as shown in FIG. In this case, the output size is changed from 1200 × 800 pixels to 400 × 8/3 × 800 pixels as shown in FIG. 15A to obtain an output image without a margin as shown in FIG. 15B. You may do it.

  In the first and second embodiments, the input image itself is enlarged. However, even when an area is cut out from the input image and the cut out area is normalized, the aspect ratio of the output image is also reduced. By changing or rotating the image in the region, the output image data S1 representing the output image without a sense of incongruity in the vertical direction can be obtained as in the first and second embodiments.

  In the first and second embodiments, when the input image and the output size are substantially the same, for example, when the input image is 300 × 400 pixels and the output size is 400 × 300 pixels, the input image is The output image is not enlarged at all.

1 is a schematic block diagram showing the configuration of an image normalization apparatus according to a first embodiment of the present invention. Diagram showing input image and output size The flowchart which shows operation | movement of 1st Embodiment. The figure which shows the process performed in 1st Embodiment The figure which shows the other process in 1st Embodiment. The figure which shows the other process in 1st Embodiment. The figure which shows the other process in 1st Embodiment. The figure which shows the other process in 1st Embodiment. Schematic block diagram showing the configuration of an image normalization apparatus according to a second embodiment of the present invention The flowchart which shows the process in 2nd Embodiment. The figure which shows the process performed in 2nd Embodiment. The figure which shows the other process in 2nd Embodiment. The figure which shows the other process in 2nd Embodiment. The figure which shows the other process in 2nd Embodiment. The figure which shows the other process in 2nd Embodiment. Diagram for explaining the prior art Diagram for explaining the prior art

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Reading means 2 Normalization means 3 Recording means 5 Judging means 6 Changing means 7, 9 Enlarging means 8 Rotating means 10 Giving means

Claims (3)

Image reproduction method for reproducing output image data obtained by converting input image data representing an input image having a predetermined aspect ratio so as to represent an output image having a predetermined aspect ratio and a predetermined output size In
The longitudinal direction of the input image and the longitudinal direction of the output image are compared. When the longitudinal direction of the input image and the longitudinal direction of the output image are different, the input image is rotated so that the longitudinal directions are aligned. The output image data obtained by enlarging and reducing the rotated input image data so as to be a size suitable for the output size, and adding rotation information indicating that the input image is further rotated, Referring to the rotation information, the output image data is rotated in a direction opposite to the direction in which the input image is rotated,
An image reproduction method comprising reproducing the output image data rotated in the reverse direction. An image reproducing apparatus for reproducing output image data obtained by converting input image data representing an input image having a predetermined aspect ratio so as to represent an output image having a predetermined aspect ratio and a predetermined output size In
Comparing means for comparing the longitudinal direction of the input image and the longitudinal direction of the output image, and when the longitudinal direction of the input image and the longitudinal direction of the output image are different, the input so that the longitudinal directions are aligned. Rotating means for rotating the image, enlarging means for obtaining the output image data by enlarging / reducing the rotated input image data so as to be a size suitable for the output size, and rotation indicating that the input image has been rotated With respect to the output image data obtained by the image normalization device provided with an adding means for adding information to the output image data, the output image data is reversed with respect to the rotation direction of the input image with reference to the rotation information. Rotating means rotating in the direction;
An image reproduction apparatus comprising: reproduction means for reproducing the output image data rotated in the reverse direction. Image reproduction method for reproducing output image data obtained by converting input image data representing an input image having a predetermined aspect ratio so as to represent an output image having a predetermined aspect ratio and a predetermined output size In a computer-readable recording medium on which a program for causing a computer to execute is recorded,
The program compares the longitudinal direction of the input image and the longitudinal direction of the output image, and when the longitudinal direction of the input image and the longitudinal direction of the output image are different, the longitudinal directions are aligned. The output obtained by rotating the input image, enlarging / reducing the rotated input image data to a size that matches the output size, and further adding rotation information indicating that the input image has been rotated For image data, referring to the rotation information, rotating the output image data in a direction opposite to the direction in which the input image is rotated;
A computer-readable recording medium comprising: a step of reproducing the output image data rotated in the reverse direction.

Images