Image exposure device, image exposure method, and program

Patent metadata

Field	Value
Publication number	US-12197116-B2
Application number	US-202217673736-A
Country	US
Kind code	B2
Filing date	Feb 16, 2022
Priority date	Sep 27, 2019
Publication date	Jan 14, 2025
Grant date	Jan 14, 2025

Abstract

There are provided an image exposure device, an image exposure method, and a program, the image exposure device including: an image display device; a support portion that supports a photosensitive recording medium for recording an image displayed on the image display device in a state in which an exposure surface thereof faces the image display device; a louver film that is provided between the image display device and the support portion and limits an angle of light radiated from the image display device; an image generation unit that generates a display image in which an image quality of a color input image is deteriorated by emphasizing a density difference of a high-frequency component of the input image; and a controller that performs a control for generating an image of an R component, an image of a G component, and an image of a B component from the display image and sequentially displaying each of the image of the R component, the image of the G component, and the image of the B component on the image display device in a predetermined order to sequentially expose the photosensitive recording medium.

First claim

What is claimed is:

1. An image exposure device comprising:
an image display device having a plurality of pixels;
a support portion that supports a photosensitive recording medium for recording an image displayed on the image display device in a state in which an exposure surface of the photosensitive recording medium faces the image display device;
a limiting member that is provided between the image display device and the support portion and limits an angle of light radiated from the image display device to the photosensitive recording medium;
an image generation unit that generates a display image in which an image quality of a color input image represented by input image data is deteriorated by emphasizing a density difference of a high-frequency component of the input image; and
a controller that performs a control for generating an image of an R component, an image of a G component, and an image of a B component from the display image and sequentially displaying each of the image of the R component, the image of the G component, and the image of the B component on the image display device in a predetermined order to sequentially expose the photosensitive recording medium,
wherein the image generating unit generates a blurred image by applying an unsharp masking to the input image, generates a high-frequency component image representing a difference between the input image and the blurred image, and generates the display image by adding the high-frequency component image to the input image.

2. The image exposure device according to claim 1 ,
wherein a total amount of light for exposing the photosensitive recording medium is determined for each color of RGB, and
the controller performs a control such that the photosensitive recording medium is sequentially exposed by each of the image of the R component, the image of the G component, and the image of the B component at an exposure time corresponding to a maximum amount of light of each color of RGB displayed on the image display device and the total amount of light.

3. The image exposure device according to claim 2 ,
wherein the total amount of light is determined based on spectral characteristics of the light radiated from the image display device and a spectral sensitivity of the photosensitive recording medium.

4. The image exposure device according to claim 1 ,
wherein each of the plurality of pixels includes a sub-pixel corresponding to each of RGB.

5. The image exposure device according to claim 1 ,
wherein the limiting member is an optical member of a diffusion optical system.

6. The image exposure device according to claim 5 ,
wherein the optical member is a louver film in which first light transmission parts that transmit light and first light shielding parts that shield light are alternately disposed in a first direction on a surface parallel to an arrangement surface where the pixels of the image display device are arranged, and second light transmission parts that transmit light and second light shielding parts that shield light are alternately disposed in a second direction on the surface, the second direction being not parallel to the first direction.

7. The image exposure device according to claim 5 ,
wherein the optical member is a louver film in which first light transmission parts that transmit light and first light shielding parts that shield light are alternately disposed in a first direction on a surface parallel to an arrangement surface where the pixels of the image display device are arranged, and second light transmission parts that transmit light and second light shielding parts that shield light are alternately disposed in a second direction on the surface, the second direction being perpendicular to the first direction.

8. The image exposure device according to claim 6 ,
wherein the louver film is formed by laminating a first layer in which the first light transmission parts and the first light shielding parts are alternately disposed only in the first direction, and a second layer in which the second light transmission parts and the second light shielding parts are alternately disposed only in the second direction.

9. The image exposure device according to claim 8 ,
wherein the first light shielding parts of the first layer include a plurality of first light shielding members disposed at predetermined intervals along the second direction, and
the second light shielding parts of the second layer include a plurality of second light shielding members disposed at predetermined intervals along the first direction.

10. The image exposure device according to claim 1 ,
wherein in a case where a weight of the unsharp masking is denoted by y and a standard deviation of a degree of a two-dimensional Gaussian distribution used for the unsharp masking is denoted by x, the following expression (1) is satisfied,
−0.1× x+ 0.50< y<− 0.1× x+ 1.00  (1).

11. The image exposure device according to claim 1 ,
wherein in a case where a weight of the unsharp masking is denoted by y, a standard deviation of a degree of a two-dimensional Gaussian distribution used for the unsharp masking is denoted by x, and a resolution of the image display device is denoted by X pixel per inch (ppi), the following expression (2) is satisfied,
−0.1× x ×( X+ 325)+0.50< y<− 0.1× x ×( X÷ 325)+1.00  (2).

12. The image exposure device according to claim 1 , further comprising:
a reception unit that receives an instruction on whether to perform batch exposure or the sequential exposure for the exposure of the photosensitive recording medium, the batch exposure exposing the photosensitive recording medium by collectively displaying the image of the R component, the image of the G component, and the image of the B component of the display image on the image display device,
wherein the controller performs a control such that the photosensitive recording medium is collectively exposed in a case where the reception unit receives an instruction for performing the batch exposure, and performs a control such that the photosensitive recording medium is sequentially exposed in a case where the reception unit receives an instruction for performing the sequential exposure.

13. The image exposure device according to claim 12 ,
wherein in a case where the sequential exposure is performed, the image generation unit generates the display image in which the density difference of the high-frequency component is more emphasized than in a case where the batch exposure is performed.

14. An image exposure method in an image exposure device including an image display device having a plurality of pixels, a support portion that supports a photosensitive recording medium for recording an image displayed on the image display device in a state in which an exposure surface of the photosensitive recording medium faces the image display device, and a limiting member that is provided between the image display device and the support portion and limits an angle of light radiated from the image display device to the photosensitive recording medium, the method comprising:
generating a display image in which an image quality of a color input image represented by input image data is deteriorated by emphasizing a density difference of a high-frequency component of the input image; and
performing a control for generating an image of an R component, an image of a G component, and an image of a B component from the display image and sequentially displaying each of the image of the R component, the image of the G component, and the image of the B component on the image display device in a predetermined orde

Assignees

• Fujifilm Corp

Inventors

• Yoshizawa Hirotoshi
• Sonoda Shinichiro

Classifications

• G03B27/04

  Copying apparatus without a relative movement between the original and the light source during exposure, e.g. printing frame or printing box · CPC title

• G03B17/52

  of the Land type · CPC title

• G03B27/725

  Optical projection devices wherein the contrast is controlled electrically (e.g. cathode ray tube masking) · CPC title

• G03B27/16

  Illumination arrangements, e.g. positioning of lamps, positioning of reflectors (controlling the exposure G03B27/72) · CPC title

• G02B5/00 Primary

  Optical elements other than lenses (light guides G02B6/00; optical logic elements G02F3/00) · CPC title