JP2010078677A - System and method for displaying image in actual size, and program therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To display images on the screen of a display in the existing configuration in actual size without making new investment by using the existing structure. <P>SOLUTION: A system 17 for displaying images in the actual size displaying the images on a display screen in the actual size includes: a data obtaining processing part 1071 for obtaining specification information of a displaying screen (screen size, a screen size aspect ratio, and vertical/horizontal resolution) and obtaining an image file storing place; an Exif information obtaining processing part 1072 for obtaining information (an object distance and vertical/horizontal field angle) in photographing embedded in image files of an Exif form existing in the image file storing place obtained with the data obtaining processing part; an image actual size calculation processing part 1073 for calculating necessary values for displaying images from the specification information of the screen and information in photographing on the screen in the actual size; and a screen output editing processing part 1074 for editing necessary screen display size (pixel number) for displaying calculated images on the screen in the actual size in img tag form of HTML. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an image actual size display system, an image actual size display method, and a program therefor, which calculate and display a screen display size (number of pixels) necessary for displaying an image in actual size on a screen of a display device.

  Conventionally, as represented by the Internet, for example, business processes that advance the purchasing process while browsing catalog information on the screen have become widespread, especially for products with a relatively small size, only confirmation of numerical size display In addition, there is a strong user's desire to determine whether or not to purchase by visually checking the actual size.

  As a conventional technique for displaying an image in an actual size on a screen of a display device, for example, there is one disclosed in Japanese Patent Application Laid-Open No. 2001-166663 “Image Display Device” (Patent Document 1).

  The image display device disclosed in Patent Document 1 can easily confirm the actual size on the display device regardless of the difference in screen size, and is therefore captured by the image capture device. By using the input resolution from the input resolution acquisition means per unit as the input pattern, the input pattern calculation device calculates the actual input pattern and displays it on the screen of the display device. Even when the screen sizes are different, characters and images can be displayed in actual size.

JP 2001-166663 A

  In general, when displaying an image at the actual size on the screen, as the first step, the information necessary to calculate the actual size of the subject is acquired when reading the image data, and as the second step, the screen resolution of the screen displaying the image And the screen size and aspect ratio of the screen size, and the third step is to calculate the value necessary to display the image on the display screen at the actual size from the information acquired in the first step and the second step. Need.

  Steps for obtaining information necessary for calculating the actual size of the subject in the first step and steps for calculating a value necessary for displaying the image in the third step at the actual size on the screen are performed. As means for realizing this, Patent Document 1 uses a dedicated image capturing device and a dedicated arithmetic device for calculating the actual size.

  As described above, the image display device disclosed in Patent Literature 1 requires a dedicated image capturing device and a dedicated arithmetic device for calculating the actual size, which not only complicates the configuration but also increases the investment. There is a problem of (high cost).

  Therefore, an object of the present invention is to use an existing mechanism without using a dedicated device, and to display an actual image size that can be displayed on the screen of the display device with an existing configuration without making a new investment. To provide a display system, an image actual size display method, and a program therefor.

In order to achieve the above object, the present invention has the following configuration.
a) An image actual size display system according to the present invention is an image actual size display system that displays an image at an actual size on a display screen of a display device. In the image actual size display system, the screen size, screen size aspect ratio, A data acquisition processing unit (data acquisition processing unit 1071) for acquiring the resolution and the image file storage location, and an image file embedded in the Exif format image file existing in the image file storage location acquired by the data acquisition processing unit. Exif information acquisition processing means (Exif information acquisition processing section 1072) for acquiring the subject distance, the vertical / horizontal angle of view, the screen size of the screen for displaying the image acquired by the data acquisition processing means, the screen size aspect ratio, Embedded in the Exif format image file acquired by the Exif information acquisition processing means. Image actual size calculation processing means (image actual size calculation processing unit 1073) for calculating a value necessary for displaying the image in actual size on the screen based on the subject distance at the time of shooting and the angle of view in the vertical / horizontal direction; Screen output editing processing means (screen output editing processing section 1074) for editing the screen display size (number of pixels) necessary for displaying the image calculated by the image actual size calculation processing means in the actual size on the screen in the HTML img tag format. Prepare.

b) An image actual size display method according to the present invention is an image actual size display method for displaying an image in actual size on a display screen of a display device. In the image actual size display method, the screen size, screen size aspect ratio, Resolution, data acquisition processing procedure for acquiring the image file storage location, subject distance at the time of shooting embedded in the image file in the Exif format existing in the image file storage location acquired by the data acquisition processing procedure, horizontal direction Exif information acquisition processing procedure for acquiring the angle of view in the vertical direction, screen size of the screen for displaying the image acquired by the data acquisition processing procedure, screen size aspect ratio, vertical / horizontal resolution), and Exif information Based on subject distance and vertical / horizontal angle of view at the time of shooting embedded in an Exif format image file acquired by the acquisition processing procedure Image actual size calculation processing procedure for calculating a value necessary for displaying the image on the screen at the actual size, and a screen display size necessary for displaying the image calculated by the image actual size calculation processing procedure on the screen at the actual size ( screen output editing processing means for editing the pixel number) into an HTML img tag format.

c) A program according to the present invention is a program for causing a computer to function as each means in the image actual size display system.

  When the present invention is applied, a dedicated image reading device is not required by using the subject distance and angle of view at the time of shooting embedded in an Exif format image file of the digital camera standard.

  Established a calculation method to calculate the screen display size (number of pixels) required to display the actual size of the image on the screen from the acquired subject distance, angle of view, screen resolution, screen size, and screen size aspect ratio. This eliminates the need for a dedicated arithmetic device.

  As a result, it is possible to provide an image actual size display system that uses an existing mechanism without using a dedicated device and can display an image on the screen in the actual size without making a new investment. Become.

  As the best mode for carrying out the present invention, an example using J2EE (Java (registered trademark) 2 Enterprise Edition), which is the de facto standard platform of the Internet usage system, will be described.

  Most recent digital camera products store images in Exif format (Exchangeable image file format). An Exif (Exchangeable image file format) image is obtained by embedding data such as thumbnail images and shooting information in the image structure. Here, the photographing information includes information including a subject distance and an angle of view at the time of photographing although it varies depending on the manufacturer and model.

  The present invention is an invention for displaying an Exif format (Exchangeable image file format) image in which actual photographing information including at least a subject distance and an angle of view at the time of photographing is embedded.

  FIG. 1 is a configuration diagram showing the entire display system including an image actual size display system according to the present invention. A data acquisition processing unit 1071 called from a Servlet operating in a J2EE-compliant Web application server and an image actual size calculation process are shown. The image actual size display system 107, which is the main part of the present invention, comprising the unit 1072 and the screen output editing processing unit 1073, the input screen (or input screen PC) 101 for starting the image actual size display system 107, and the image An input information DB 102 storing input information necessary for starting the actual size display system 107, an argument 103 including a URL and a value of the input information DB 102 necessary for starting the actual image size display system 107, and the actual image size display system 107 J2EE compliant Web application server 104, which is the execution environment, and J2EE compliant Web application JSP (Java (registered trademark) Server Pages) 105 operating in the application server, Servlet (Java (registered trademark) class as JSP execution format) 106 operating in the J2EE-compliant Web application server, and the image Exif format (Exchangeable image file format) image file storage location DB 108 that holds the storage location of the image file that is displayed in the actual size display system 107, and Exif that the image actual size display system 107 displays the actual size Exif format image file DB 109 that holds images in the format, HTML 110 output from a Servlet (Java (registered trademark) class that is a JSP execution format) that runs in a J2EE-compliant Web application server, and the actual size display of the image data Image display screen (or image display screen PC) 1 And a 1. The input screen PC 101 and the image display screen PC 111 are the same PC.

  FIG. 2 is a flowchart for explaining the processing of the actual image display system 107 according to the present invention.

  An image actual size display system 107 according to the present invention includes a data acquisition processing unit 201 (corresponding to the data acquisition processing unit 1071 in FIG. 1), an Exif information acquisition processing unit 202 (corresponding to the Exif information acquisition processing unit 1072 in FIG. 1), and an image. The actual size calculation processing unit 203 (image actual size calculation processing unit 1073 in FIG. 1) and the screen output editing processing unit 204 (corresponding to the screen output editing processing unit 1074 in FIG. 1) are used to display the actual image size according to the present invention. Process.

  Here, in explaining the processing flowchart of the image actual size display system 107 in FIG. 2, the Exif format image file DB 209 (corresponding to the Exif format image file DB 108 in FIG. 1) and the input information DB 205 (corresponding to the input information DB 102 in FIG. 1). Item descriptions and data examples of the Exif format image file storage location DB 207 (corresponding to the Exif format image file storage location DB 108 of FIG. 1) will be described.

  FIG. 3 shows item descriptions and data examples of the Exif format image file DB 209 (corresponding to the Exif format image file DB 108 of FIG. 1).

  As shown in FIG. 1A, the Exif format image file DB 209 is an item description (definition) of the Exif format image file DB 209, and includes a “subject distance” that is a distance to the subject and a photograph in a direction perpendicular to the lens. It has items of “image (vertical direction)” which is an angle of the range and “image (horizontal direction)” which is an angle of the range in which a horizontal photograph is taken with respect to the lens. FIG. 2B shows a specific example of data.

  FIG. 4 shows item descriptions (definitions) and data examples of the input information DB 205 (corresponding to the input information DB 102 of FIG. 1).

  As shown in FIG. 1A, the input information DB 205 includes “screen size (inch)” indicating the size of the screen, “screen size aspect ratio (vertical)” indicating the aspect ratio of the screen size, and the screen size. “Screen size aspect ratio (horizontal)” indicating the aspect ratio, “screen resolution (vertical direction)” indicating the vertical screen resolution, and “screen resolution (horizontal direction)” indicating the horizontal screen resolution. Have items. FIG. 2B shows a specific example of data.

  FIG. 5 is an item description (definition) and data example of the Exif format image file storage location DB 207 (corresponding to the Exif format image file storage location DB 108 of FIG. 1).

  As shown in FIG. 2A, the Exif format image file storage location DB 207 has an item “Exif format image file storage location” indicating the path / file name of the Exif format image file. FIG. 2B shows a specific example of data.

  In the processing of the actual image size display system 107 shown in FIG. 2, first, the data acquisition processing unit 201 (corresponding to the data acquisition processing unit 1071 in FIG. 1) performs screen size (inch) and screen size aspect ratio (vertical / horizontal). And the screen resolution (vertical / horizontal) are acquired from the input information DB 205 (corresponding to the input information DB 102 in FIG. 1) (step S206). Here, it is assumed that the screen size (inch) and the screen size aspect ratio (vertical / horizontal) can be acquired.

  Next, the Exif format image file storage location (path / file name) is acquired from the Exif format image file storage location DB 207 (corresponding to the Exif format image file storage location DB 108 of FIG. 1) (step S208).

  Next, the Exif format image file DB 209 (based on the Exif format image file storage location (path / file name) acquired in step S208 by the Exif information acquisition processing unit 202 (corresponding to the Exif information acquisition processing unit 1072 in FIG. 1). The subject distance and angle of view (vertical / horizontal directions) at the time of shooting are acquired from the Exif format image file DB 109 in FIG. 1 (step S210). Here, it is assumed that the subject distance and the angle of view (vertical / horizontal directions) at the time of shooting can be acquired.

  Next, the actual actual size calculation processing unit 203 (the actual image size calculation processing unit 1073 in FIG. 1) calculates the actual size of the subject as follows.

Based on the subject distance and the angle of view (vertical / horizontal direction) obtained in step S210, the actual height and width of the subject are calculated using the following calculation method (step S211).
Height (mm) = 2 × (Subject distance (m) × 1000 × tan (Field angle (vertical direction) (degrees) / 2)) ⇒ (a)
Width (mm) = 2 × (Subject distance (m) × 1000 × tan (angle of view (horizontal direction) (degrees) / 2)) ⇒ (b)
The height calculation result was (a), and the width calculation result was (b).

Next, the screen size is calculated as follows.
From the screen size (inch) acquired in step S206 and the screen size aspect ratio (vertical / horizontal), the height and width sizes of the screen are calculated using the following calculation method (step S212).
Height (mm) = (screen size (inch) / √ (screen size aspect ratio squared + screen size aspect ratio squared)) x screen size aspect ratio x 25.4⇒ (c)
Width (mm) = (Screen size (inch) / √ (Screen size aspect ratio squared + Screen size aspect ratio squared)) x Screen size aspect ratio x 25.4⇒ (d)
The height calculation result was (c), and the width calculation result was (d).

Next, the 1-pixel size of the screen is calculated as follows.
Based on the screen resolution (vertical / horizontal) acquired in step S206 and the size of the screen height and width calculated in step S212, the 1-pixel size of the screen is calculated using the following calculation method (step S213).
Height (mm) = (c) / screen resolution (vertical) ⇒ (e)
Width (mm) = (d) / screen resolution (horizontal) ⇒ (f)
The height calculation result was (e) and the width calculation result was (f).

Next, the actual size display pixel number of the height and width of the subject is calculated as follows.
From the actual size of the subject height and width calculated in step S211 and the screen 1 pixel size calculated in step S213, the actual number display pixel number of the subject height and width is calculated using the following calculation method (step S214).
Height (pixel) = (a) / (e) ⇒ (g)
Width (pixel) = (b) / (f) ⇒ (h)
The height calculation result was (g), and the width calculation result was (h).

  Next, from the actual size display pixel numbers ((g) and (h)) of the height and width of the subject calculated in step S214 by the image output editing processing unit 204 (corresponding to the image output editing processing unit 1074 in FIG. 1), An HTML img tag for displaying the actual size of the image data is generated (step S215).

  FIG. 6 is a conceptual diagram of the actual image display according to the present invention, where an image A (covered area 3000 mm) of 1800 mm in length is recorded as an image B (frame size of 600 dots) of 360 dots by a digital camera (digital camera). And an example of the number of dots when displaying at a resolution of 600 and 900 on a display screen of 6000 mm (A), 3000 mm (B), and 1500 mm (C) in the vertical direction, respectively. In this example, the entire screen can be displayed on the display screens (a) and (b), but the entire screen cannot be displayed because the size of the display screen (c) is too large.

  7 and 8 show examples of the JSP program 105 and the HTML 110 according to the present invention.

  The functions realized by the data acquisition processing unit 1071, the image actual size calculation processing unit 1072, and the screen output editing processing unit 1073 in the image actual size display system 107 in the J2EE-compliant Web application server 104 described with reference to FIG. A program (data acquisition processing program, image actual size calculation processing program, and screen output editing processing program) corresponding to the processing unit (data acquisition processing unit, image actual size calculation processing unit, and screen output editing processing unit) is J2EE-compliant Web application server 104. This is realized by being executed by the CPU constituting the. These programs (data acquisition processing program, image actual size calculation processing program, and screen output editing processing program) can be distributed to the market via a computer-readable recording medium such as a CD-ROM or DVD, the Internet, or the like.

1 is a configuration diagram illustrating an entire image actual size display system according to the present invention. It is a flowchart for demonstrating the process of the image actual size display system which concerns on this invention. It is item description and data example of Exif format image file DB which concern on this invention. It is an item description and data example of input information DB concerning the present invention. It is item description and an example of data of Exif format image file storage location DB which concern on this invention. It is a conceptual diagram of the actual image display in the present invention. It is an example of a JSP program according to the present invention. It is an example of HTML concerning the present invention.

Explanation of symbols

100: Image actual size display system 101: Input screen 102, 205: Input information DB
103: URL and argument 104: J2EE-compliant Web application server 105: JSP
106: Servlet (Java (registered trademark) class which is a JSP execution format)
107: Actual image display system 1071: Data acquisition processing unit 1072: Exif information acquisition processing unit 1073: Actual image size calculation processing unit 1074: Screen output editing processing unit 108, 207: Exif format image file storage location DB
109,209: Exif format image file DB
10: HTML
111: Image display screen

Claims (6)

In an image actual size display system that displays an image in actual size on a display screen of a display device,
Data acquisition processing means for acquiring the screen size of the screen for displaying the image, the screen size aspect ratio, the vertical / horizontal resolution, and the image file storage location;
Exif information acquisition processing means for acquiring a subject distance and vertical / horizontal angle of view at the time of shooting embedded in an Exif format image file existing in the image file storage location acquired by the data acquisition processing means;
Embedded in the image file of the Exif format acquired by the Exif information acquisition processing means, the screen size of the screen on which the image acquired by the data acquisition processing means is displayed, the screen size aspect ratio, and the vertical / horizontal resolution). Image actual size calculation processing means for calculating a value necessary for displaying an image in actual size on the screen based on the subject distance at the time of shooting and the vertical / horizontal angle of view;
Screen output editing processing means for editing the screen display size (number of pixels) necessary for displaying the image calculated by the image actual size calculation processing means in the actual size on the screen into an HTML img tag format. The actual image display system. The image actual size display system according to claim 1,
The image actual size calculation processing means includes:
Means for calculating the vertical / horizontal actual size of the subject based on the subject distance and the vertical / horizontal angle of view;
Means for calculating the height and width of the display screen based on the screen size and the screen size aspect ratio;
Means for calculating the vertical / horizontal dimensions of one pixel on the screen based on the height and width of the display screen and the vertical / horizontal resolution;
It comprises means for calculating the number of pixels in the vertical / horizontal direction of the actual size display of the subject based on the vertical / horizontal size of the one pixel and the actual size of the subject in the vertical / horizontal direction. Image actual size display system. The image actual size display system according to claim 1 or 2,
Stores an input information DB that stores the screen size, screen size aspect ratio, and vertical / horizontal resolution of the image display screen, an image file storage location DB that stores the image file storage location, and an Exif format image file. Exif format image file DB
The data acquisition processing means is means for acquiring the screen size, screen size aspect ratio, vertical / horizontal resolution from the input information DB, and acquiring the image file storage location from the image file storage location DB. ,
The Exif information acquisition processing means is means for acquiring from the Exif format image file DB the subject distance and vertical / horizontal angle of view at the time of shooting embedded in the Exif format image file. Image actual size display system. In an image actual size display method for displaying an image in actual size on a display screen of a display device,
Data acquisition processing procedure for acquiring the screen size of the screen displaying the image, the screen size aspect ratio, the vertical / horizontal resolution, and the image file storage location;
An Exif information acquisition processing procedure for acquiring a subject distance and a vertical / horizontal angle of view at the time of shooting embedded in an Exif format image file existing in the image file storage location acquired by the data acquisition processing procedure;
Embedded in the image file of the Exif format acquired by the Exif information acquisition processing procedure and the screen size of the screen on which the image acquired by the data acquisition processing procedure is displayed, the screen size aspect ratio, and the vertical / horizontal resolution). Image actual size calculation processing procedure for calculating a value necessary for displaying an image in actual size on the screen based on the subject distance at the time of shooting, and the vertical / horizontal angle of view;
A screen output editing processing procedure for editing a screen display size (number of pixels) necessary for displaying the image calculated by the image actual size calculation processing procedure in the actual size on the screen into an HTML img tag format. How to display the actual image size. The image actual size display method according to claim 4,
The actual image size calculation processing procedure is as follows:
Calculating the actual size of the subject in the vertical / horizontal direction based on the subject distance and the angle of view in the vertical / horizontal direction;
Calculating the height and width of the display screen based on the screen size and the screen size aspect ratio;
Calculating the vertical / horizontal dimensions of one pixel on the screen based on the height and width of the display screen and the vertical / horizontal resolution;
The method includes a step of calculating the number of vertical / horizontal pixels of the actual size display of the subject based on the vertical / horizontal size of the one pixel and the actual size of the subject in the vertical / horizontal direction. Image actual size display method.   The program for functioning a computer as each means in the image actual size display system in any one of Claim 1 to 3.

Images