JPH0375630A - Image exposing device - Google Patents

Abstract

PURPOSE:To adjust a color with only one trial exposure and to minimize waste in terms of time and cost by selecting an optimum tone image out of the images of a color adjustment chart and exposing an overall image with the selected tone. CONSTITUTION:Red, green, and blue filters 4 are provided between a CRT 3 and a lens 5 so as to perform a full color transfer, and the entire image formed on the CRT 3 is exposed to a light and pressure sensitive recording medium 6 via the filters 4 and the lens 5. Plural reduced images of different tones are exposed to the light and pressure sensitive recording medium 6. An arbitrary image is selected out of those plural images, and then the entire image is exposed with the tone of the selected image. Thus, plural images of different color tones are exposed to the same recording sheet 6 at a time, and then, a color adjustment chart is outputted, so that an optimum tone image is selected out of the images of the adjustment chart 6 and the entire image is exposed with the selected tone. Therefore, time and cost are reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image exposure apparatus, and more particularly to an image exposure apparatus that forms an image formed on a cathode ray tube onto a light- and pressure-sensitive recording medium.

[Conventional technology]

Conventionally, as such an image exposure apparatus, there is an image exposure apparatus 100 as shown in FIG. Such an image exposure apparatus 100 has a CRT 102 made of a white cathode ray tube connected to an external computer 101. The CRT 102 is driven by a cathode ray tube drive circuit 103.

On the other hand, the image on the CRT 102 is arranged so as to be formed on a photosensitive pressure sensitive recording medium 106 via a color separation filter 104 and a lens 105.

The photosensitive and pressure sensitive recording medium 106 is housed in a cassette case 107, and when exposed to light, is pulled out from the cassette case 1.07, sent by a feed roller 108, and wound up by a take-up roller 110.

According to the image exposure apparatus 100 configured in this way, CR
The image on T 102 is focused by a focusing lens 105 and transferred to the photosensitive recording medium 10 through a color separation filter 104.
Form an image on 6. As a result, a multicolor latent image is formed on the photosensitive recording medium 106.

On the other hand, the developer paper stored in another part of the image exposure apparatus 100 is sent to the development section 109, where the exposed portion of the photosensitive recording medium and the developer paper are superimposed, and pressure is applied in the development section. The image on the photosensitive recording medium is transferred to color developer paper, and the color developer paper after transfer is discharged to a paper discharge tray.

[Problem to be solved by the invention]

However, according to the image exposure apparatus of the prior art, since the contrast for color tone comparison is only the image that appeared first, 1
When outputting one sheet at a time, it is necessary to perform color adjustment, which results in unnecessary images being output before the image with the desired tone is obtained, which is a problem in terms of cost and time. there were.

The present invention has been made in view of the problems of the prior art described above, and its purpose is to select an image with an optimal tone from among a plurality of images exposed on the single sheet of recording paper, It is an object of the present invention to provide an image exposure apparatus that allows color adjustment by performing exposure in that color tone with one trial exposure, and is less wasteful in terms of time and cost.

[Means to solve the problem]

The present invention provides an image exposure apparatus that forms an image on a photosensitive recording medium based on an image formed using a cathode ray tube.
It has an exposure means for exposing a plurality of reduced images having different tones on the same photosensitive recording medium, and an image selection means for selecting an arbitrary image from the plurality of images, and a method for selecting the selected one. Expose the image using the image tone.

[Effect]

Accordingly, the present invention exposes a plurality of reduced images having different tones on a light-sensitive and pressure-sensitive recording medium, selects an arbitrary image from the plurality of images, and creates an image with the tone of the selected one image. Perform exposure. In this way, multiple images with different tones are exposed at the same time on the same recording paper and a color adjustment chart is output, so the image with the optimal tone is selected from the images on the color adjustment chart and exposed with that tone. By doing so, both time and cost can be reduced.

〔Example〕

The present invention will be described below based on an embodiment shown in the drawings. FIG. 1 shows a schematic configuration diagram of an image exposure apparatus of the present invention. The image exposure apparatus has an external computer 1. The external computer 1 is connected to a control section 2 that receives image signals manually input from the external computer 1 . Also,
Red, green, and blue filters 4 are provided between the CRT 3 and the lens 5 for full color transfer.

Further, the image formed on the CRT 3 is exposed onto a photosensitive pressure sensitive recording medium 6 via a filter 4 and a lens 5. Here, the unexposed photosensitive pressure sensitive recording medium 6 is
It is housed in a cassette case 7, is transported by a feed roller 8, is exposed on the upper part of the CRT 3, is developed in a printing section 9, and is wound around a winding and rerolling roller 1o.

Next, details of the configuration of the control 112 will be explained with reference to FIG. The control unit 2 includes an A/D converter 1 to which an image signal is supplied.
1 and a memory 12 for storing digitized image signals. The memory 12 is connected to the CPU 13, and the CPU 13 is connected to a RAM 14 that stores images stored in the memory 12 in a reduced form, and further connected to a ROM 15 that stores several types of exposure patterns. has been done. In addition, the CPU 1 stored in the ROM 15
A plurality of different images created based on the exposure pattern in step 3 are stored in VRAMI 6.

A D/A converter 17 is connected to this VRAMI 6,
A CRT drive circuit 18 is connected to the D/A converter 17, and the CRT drive circuit 18 is connected to the CRT 3.

The image exposure apparatus configured as described above operates as follows. This will be explained with reference to the flowchart in FIG.

First, the image signal to be displayed on the external computer 1 is
About the image: Red (R), Green (G), Blue (
There are three types of B), each of which is input to the control unit 2. In the control section 2, the three types of image signals mentioned above are each digitized by the A/D converter 11 and stored in the memory 12 (step 100). When an instruction to output a color adjustment chart is input from the keyboard of an external computer, the CPU 13 extracts the image signal stored in the memory 12 every 5 dots in both the vertical and horizontal directions, reducing the overall image size to 1. /25 times (step 101). After that 1/2
The image signal multiplied by 5 times is stored in the RAM 14 (step 102).

The numbers start from n=o (step 103).

Next, implement n one by one (step 10
4). The ROMI 5 stores 25 types of red, green, and blue exposure patterns numbered from 1 to 25, with number 1 as a reference (a memory that does not change the exposure pattern). For each type of pattern, the exposure amount of red, green, and blue of the image signal stored in the RAM 14 is changed and color adjustment is performed to create a plurality of images with 25 different tones (step 105). , an exposure device that exposes a plurality of images with 25 different tones includes an A/D converter 11;
Memory 12, CPU 3, RAM 14, ROM 15,
It is composed of a VRAMI 6, a D/A converter↓7, a CRT drive circuit 18, and a CRT19. This image signal is then stored in the V RAM 16 together with the numbers of the 25 types of exposure patterns (step 106).

Then, it is determined whether n is 25 (Step 107)
. Among the filters 4, a red (R) filter is inserted into the upper part of the CRT 3 (step 108). next,
Of the 25 types of red (R), green (G), and blue (B) image signals stored in the VRAM 16, the red (R) image signal is displayed in the upper left corner as shown in Figure 4. The image signal of 25 is controlled by CPU 3 so that the image signal No. 25 is placed in the lower right corner, and the exposure pattern number of the image is displayed in the lower right corner of each of the 25 types of images. Output to CRT3 (step 10
9). The image displayed on the CRT 3 passes through the filter 4 and lens 5, and is exposed to red light onto the photosensitive and pressure sensitive recording medium 6 (step 110).

When the red exposure is completed, the filter 4 is switched from red to green (step 111), a green image signal is output to the CRT (step 112), and green exposure is performed (step 113), and when the green exposure is completed, the above-mentioned Switch the filter 4 from green to blue (step 114) and convert the blue image signal to CR.
Step 115), blue exposure is performed (step 116), and when the red, green, and blue exposures are all completed, the exposed light-sensitive pressure-sensitive recording medium 6 is fed by the feed roller 8, and transferred to the developing section 9. The image is transferred to a developing paper (not shown in the figure) and developed (step 117).
), and outputs a color adjustment chart as shown in FIG. 4 (step 118). The user selects an image of a desired color tone from the color adjustment chart and inputs the number of this image from the keyboard section of the external computer 1 (step 119).

The number input into the external computer 1 is sent to the control section 2. After acknowledging the input of the number, the PU 13 stores the color tone of the number input from the external computer 1 in the unreduced image signal in the memory 12 and stores it in the ROM 1.
In step 120), each color of red, green, and blue is corrected and outputted to the CRT 3 in the order of red, green, and blue. Here, the image selection device includes an external computer 1, a CPU 13, and a memory 1.
2. Consists of ROMI 5. After that, CRT3
The upper image is focused by the focusing lens 5 to form an image on the photosensitive recording medium 6 via the filter 4 (step 122). As a result, a multicolor latent image is formed on the photosensitive recording medium 6.

On the other hand, the developer paper stored in another part of the image exposure device is sent to the development section 9, where the exposed portion of the photosensitive recording medium 6 and the developer paper are overlapped and pressurized. The image on the recording medium 6 is transferred to color developer paper, and the color developer paper after transfer is discharged to a paper discharge tray. If there is no instruction to output the color adjustment chart in the external computer 1 and exposure is to be performed, the image signal stored in the memory 12 is exposed using the No. 1 exposure pattern stored in the ROM 15, and the image is output. .

Note that although the description has focused on a white cathode ray tube as the cathode ray tube, a multicolor cathode ray tube may also be used. In this case, filter 4 is not necessary.

〔Effect of the invention〕

The present invention exposes a plurality of images with different tones at once and outputs a color adjustment chart. By selecting an image with the optimal color tone from among the images on the color adjustment chart and exposing it with that color tone, color adjustment can be made with just a few trial exposures, reducing waste in terms of time and cost. can.

3...CRT 4...Filter 5...Lens 6...Photosensitive pressure sensitive recording medium

Claims (1)

[Claims] In an image exposure device that forms an image on a photosensitive recording medium based on an image formed using a cathode ray tube, an exposure means that exposes a plurality of reduced images having different tones on the same photosensitive recording medium; 1. An image exposure apparatus comprising: an image selection means for selecting an arbitrary image from the plurality of images, and exposing the image in the tone of the selected image.