JPH1056650A - Hard copy equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily balance respective hues of a recording image by displaying a monochromatic image consisting of each video signal onto an image display means in the order of green, blue and red or of blue, green and red. SOLUTION: This hard copy equipment 10 is provided with a video signal output section 12, a signal selection section 14, a light emission control circuit 16, a monochromatic CRT display device 18, a color wheel 20, an image pickup lens 22, a CPU 40, and a camera control section 54. The signal selection section 14 generates video signals 32, 34, 36 corresponding to red, green, blue primary color images in the order of green 34, blue 36, red 32 or blue 36, green 34, red 32 based on the area sequential or the line sequential system, and the CPU 40 uses display of three consecutive monochromatic images consisting of the video signals 32, 34, 36 as repetitive display in one unit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a hard copy device,
More particularly, the present invention relates to a hard copy device for optically recording a still image displayed on an image display means on a silver halide film.

[0002]

2. Description of the Related Art As a device for recording various images, a so-called hard copy device is widely used.
Examples include an RT hard copy, a printer, a plotter, and a facsimile. Among them, the CRT hard copy optically records a color image by sequentially irradiating a silver halide film with light carrying information of each primary color image displayed on a CRT display and performing overlapping exposure. .

[0003]

However, in the above-mentioned conventional hard copy apparatus, a color CRT is generally used.
A display is used. If the display is miniaturized and its luminous efficiency is to be improved, the luminous intensity of the red image is weaker than that of other colors. For this reason, when the color of the obtained recorded image is compared with the color of the subject, the recorded image becomes lighter in red than the subject.

In particular, the CRT is synchronized with the shutter open signal.
When the display is caused to emit light, the amount of light emitted in the first and second frames is smaller than the amount of light emitted in other frames due to its rising characteristics. Therefore, when a red image is brought in the first or second frame, the problem that the redness of the recorded image becomes lighter becomes more serious.

When a hard copy device is used for medical diagnosis, for example, the diagnostic result often depends on the color of each part of the recorded image. There has been a strong demand for the development of a technology that can achieve the same color as the actual color of the subject.

In view of the above, conventionally, it has been conceived to control the opening and closing timing of a shutter provided between a color CRT display and a silver halide film so as to thin out a part of the green and blue images excluding red. . By thinning out a part of the green and blue images in this way, the color of the recorded image can be brought close to the actual color of the subject, but it is not satisfactory. In addition, it is necessary to create a program for thinning out these images, which complicates the configuration and increases costs such as labor costs for creating the program.

Conventionally, it has been considered that the exposure compensation is set to a minus value. However, in this case, the brightness of the entire recorded image becomes insufficient, and the color tone equivalent to the actual color tone of the subject is also obtained. The resulting recorded image could not be obtained. The present invention has been made in view of the above circumstances,
It is an object of the present invention to provide a hard copy device capable of more faithfully reproducing the actual color of a subject without complicating the configuration.

[0008]

In order to achieve the above object, a hard copy apparatus according to the present invention comprises a video signal generating means, an image displaying means, a color filter means, a photographing lens means, and a film disposing means. And a control unit for controlling a predetermined operation of each of the units disposed on the common optical axis.

The video signal generating means separates the color video signal into color, and converts each of the video signals corresponding to the red, green, and blue primary color images into green, blue, red or blue, green, and red in this order. Occurs on a sequential or line sequential basis. The image display means sequentially displays images corresponding to the primary color images based on luminance information of each video signal from the video signal generation means.

[0010] The color filter means causes a color filter corresponding to each image displayed on the image display means to enter the front of the image display means in synchronization with the display switching timing of each image. The photographing lens means,
Each image from the image display means is formed on a silver halide film surface. The film arranging means arranges a silver halide film on which image information from the image display means is overlaid and exposed through the filter of the predetermined color at a predetermined position.

The control means repeats the display of three consecutive monochrome images related to the red, green, and blue video signals as one unit of display, and irradiates the silver halide film surface based on predetermined information. The number of display repetitions of the light carrying the image information by the image display means is determined so that the exposure amount of the silver halide film becomes an appropriate value, and the silver of the light carrying the image information by the determined number of display repetitions is obtained. Irradiation to the salt film is allowed. Preferably, the predetermined information is at least brightness information of the photographing lens and sensitivity information of the silver halide film.

[0012]

Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows Embodiment 1
1 shows a schematic configuration of a hard copy apparatus according to the first embodiment.
As shown in FIG. 1, the hard copy device 10 according to the first embodiment includes a video signal generating unit including a video signal output unit 12, a signal selection unit 14, and a light emission control circuit 16, and an image display including a monochrome CRT display 18. Means,
A color filter means comprising a color wheel 20, a photographing lens 22, a shutter 24, a film disposing means comprising a film winding motor 26, and a control means comprising a central control unit 28 are provided.

In the first embodiment, a camera control unit 54 is provided. The camera controller 54 automatically reads the brightness information of the photographing lens 22 and the sensitivity information of the silver halide film 38 and inputs them to the central control unit 28. The video signal output unit 12 outputs red (R), green (G), and blue (B) primary color image signals 32, 34, and 36 obtained by color separation of a color video signal.

The signal selection section 14 includes a synchronization signal generation circuit 45
The primary color image signals 32, 34, 3 output from the video signal output unit 12 based on the input timing of the synchronization signal from
6 are extracted in a predetermined order. That is, in the first embodiment, the signal selection unit 14 determines each primary color image in the order of blue (B), green (G), red (R), ..., blue (B), green (G), and red (R). The signals 32, 34 and 36 are extracted and input to the light emission control circuit 16.

The light emission control circuit 16 outputs the primary color image signals 32, 34, 34,.
The transmission timing to the monochrome CRT display 18 is finely adjusted.
Enter 8 As a result, the images related to the respective primary color image signals 32, 34, 36 can be displayed on the monochrome CRT display 18 at regular intervals.

Based on the luminance signals of the primary color image signals 32, 34, 36 whose transmission intervals have been finely adjusted by the light emission control circuit 16, the monochrome CRT display 18 has monochrome images corresponding to the primary color image signals 32, 34, 36. Are sequentially displayed. As shown in FIG. 2, the color wheel 20 is provided with red, green, and blue color filters 37, 39, and 41 on a color wheel main body 20a so as to divide a circle into three equal parts.

A shaft 43a of a motor 43 is fixed substantially at the center of the color wheel 20. This allows
The rotation of the motor 43 is transmitted via the shaft 43a, and the color wheel 20 rotates. The color wheel 20 is provided with a hole 20b. A light source unit and a light receiving unit (not shown) of the photo-interrupter 44 are arranged on the circumference provided with the hole 20b so as to face each other with the color wheel 20 interposed therebetween.

That is, this photo interrupter 44
Is provided so that when the hole 20b of the color wheel 20 is located on the optical axis, the light receiving unit can receive light from the light source unit. The number of rotations of the color wheel 20 is calculated based on how many times the light receiving unit of the photo interrupter 44 can receive the light from the light source unit within a predetermined time. input.

Further, by correlating the signal from the photo-interrupter 44 with the synchronizing signal from the synchronizing signal generating circuit 45, which color filter 37, 39, 41 is currently present on the optical axis X of the hard copy device 10. You can know if it is located. The taking lens 22 forms an image of light carrying image information from the monochrome CRT display 18 on the surface of the silver halide film 38.

The film winding motor 26 has a silver halide film 38 on which image information from the monochrome CRT display 18 is overlaid and exposed via the color wheel 20.
Is disposed at a predetermined position. The central control unit 28 has C
A PU 40 and a parameter setting memory including a random access memory (RAM) 42 are mounted. The CPU 40 uses the synchronization signal from the synchronization signal generation circuit 45 to synchronize the light emission timing of the monochrome CRT display 18 with the color wheel 20.

That is, when the green color filter 39 is located on the common optical axis X where the respective components are arranged, the CPU 40 displays a monochrome image corresponding to the green image on the monochrome CRT display 18. When a blue color filter 41 is located on the optical axis X, a red color filter 37 is located on the optical axis X so that a monochrome image corresponding to the blue image is displayed. Monochrome image corresponding to the image of monochrome CRT
The display timing of the monochrome CRT display 18 is controlled so as to be displayed on the display 18.

In the first embodiment, the CPU 4
0 is a primary color image signal 3 of red (R), green (G), and blue (B)
The display of three consecutive monochrome images of 2, 34 and 36 is regarded as one unit of repeated display, and the camera control unit 54
Based on the brightness information of the photographing lens 22 and the sensitivity information of the silver halide film 38, the number of display repetitions of the light carrying the respective image information for irradiating the silver halide film 38 by the monochrome CRT display 18 is calculated by the silver halide film 38. Is required to be an appropriate value.

After determining the number of display repetitions, the CPU 40 allows the light carrying image information to be applied to the silver halide film 38 by the determined number of display repetitions. That is, when a shooting start signal instructing the start of shooting is input from the manual input unit 50, the CPU 40 drives the camera control unit 54 to open the shutter 24.

Then, with the shutter 24 open, the primary color image signals 32, 3 of red (R), green (G), and blue (B)
When the display of three continuous monochrome images of 4, 36 is regarded as one unit of repetitive display, and irradiation of the silver halide film 38 with light carrying image information by the number of display repetitions is permitted, the camera control unit 54 The shutter 24 is driven to close.

When the CPU 40 confirms that the shutter 24 is closed, the CPU 40 inputs a film winding signal for instructing winding of the silver halide film 38 to the camera control unit 54, and drives the film winding motor 26 to drive the silver halide film. 38 is wound up by one frame.

The CPU 40 includes a keyboard 4
6. The liquid crystal display 52 is electrically connected to the manual input means 50 including the mouse 48 and the like. Then, the operator can input the number of frames (m) and the like of the silver halide film 38 from the manual input means 50 while watching the initial setting screen displayed on the liquid crystal display 52. These input values are input to the CPU 40 and are temporarily stored in the RAM 42.

The setting contents of the RAM 42 can be appropriately changed by using the manual input means 50. The hard copy device 10 according to the first embodiment is generally configured as described above, and its operation will be described next.

FIG. 3 is a flow chart for explaining the operation of the hard copy apparatus 10 shown in FIG. As shown in FIG.
When the power is turned on, the CPU 40 automatically reads the shooting lens 22 information (for example, brightness information) from the camera control unit 54 (s10). Further, information on the silver halide film 38 (for example, sensitivity information) is automatically read (s12).

Although not shown in the flow chart shown in FIG. 2, when the power of the hard copy device 10 is turned on, an initial setting screen is displayed on the liquid crystal display 52. The number of frames (m) of the silver halide film 38 can be manually set by the manual input means 50. When the setting of these information is completed, the CPU 40 obtains the number of display repetitions by the monochrome CRT display 18 based on the brightness information of the photographing lens 22 and the sensitivity information of the silver halide film 38, and sets it as a set exposure amount (s13). ).

That is, the CPU 40 sets the display of three consecutive monochrome images of the red (R), green (G), and blue (B) primary color image signals 32, 34, and 36 as one unit of repeated display. Based on the brightness information of the taking lens 22 and the sensitivity information of the silver halide film 38, the number of display repetitions is determined so that the exposure amount of the silver halide film 38 becomes an appropriate value, and this is stored in the RAM 42 as the set exposure amount.

When the set exposure amount is determined, the CPU 40 sets the hard copy device 10 in a standby state until a photographing start signal instructing the start of photographing is input from the manual input means 50 (s14). When a shooting start signal is input, the synchronization signal generation circuit 45 starts generating a synchronization signal (s1).
6).

When the synchronizing signal is generated, the CPU 40 drives the motor 43 to start the rotation of the color wheel 20 (s18). When the color wheel 20 rotates, the photo interrupter 44 detects the number of rotations of the color wheel 20. That is, the CPU 40 controls the color wheel 2 detected by the photo interrupter 44.
It is determined whether the number of rotations of 0 is stable or not by comparing with the synchronization signal generated by the synchronization signal generation circuit 45 (s20).

The CPU 40 waits for a time without opening the shutter 24 until it confirms that the rotation speed of the color wheel 20 is stabilized. When the CPU 40 confirms that the rotation speed of the color wheel 20 has stabilized, the CPU 40 performs a home search of the color wheel 20 (s22). When the home search of the color wheel 20 is completed, for example, the blue color filter 41 of the color wheel 20 is initialized as a home position (s24).

When the blue color filter 41 is initialized, the CPU 40 drives the camera control unit 54 to open the shutter 24 (s26). When the shutter 24 is opened, the signal selection unit 14 detects a color filter 37 that is predicted to be located on the common optical axis X when displayed on the monochrome CRT display 18 based on the synchronization signal from the synchronization signal generation circuit 45. , 39, 41, the primary color image signals 32, 34, 36 obtained by decomposing the color video signal from the video signal output unit 12 are read (s26).

Here, when a monochrome image corresponding to a red image is displayed on a CRT display, the luminous intensity thereof is generally weaker than that of a monochrome image corresponding to a green image and a blue image. Would. for that reason,
When the signal selection unit 14 reads out the image signal 32 of the red image whose light emission intensity is originally low in the first frame or the second frame in which the light emission amount is reduced, and displays this, the start-up characteristic of the CRT display is obtained. By
The amount of red light applied to the silver halide film 38 is smaller than the amount of other colors.

As a result, there is a possibility that the redness of the obtained recorded image may be very light compared with the actual color of the subject. Therefore, in the first embodiment, the signal selection unit 14 outputs the image signal 32 of a red image having a low light emission intensity.
Is read out in the first frame or the second frame in which the light emission amount of the CRT display is reduced, and this is not displayed, but as shown in FIG. 4, the primary color image signals 32, 34, and 36 are read out. For example, blue (B) 36,
Green (G) 34 and red (R) 32 are read in a predetermined order.

That is, as shown in the figure, the image signals 36 of the blue (B) and green (G) images are provided in the first and second frames in which the light emission amount is reduced due to the rising characteristics of the CRT display. , 34. Then, in the third frame in which the light emission amount of the CRT display 18 is stabilized, the image signal 32 of the red (R) image whose light emission intensity is weaker than that of the image signals 34 and 36 of the other colors comes, so that the CRT display 18 is obtained. Thus, it is possible to easily balance the light emission amounts of the respective images according to the primary color image signals 32, 34, and 36, and to make the exposure amount of the silver halide film 38 of each color substantially uniform. Therefore, the color of the obtained recorded image can be made as close as possible to the actual color of the subject.

When the primary color image signals 32, 34, 36 are read out, the light emission control circuit 16 converts the primary color image signals 32, 34, 36 into a monochrome CRT display based on the input timing of the synchronization signal from the synchronization signal generation circuit 45. 18
And the CRT display 18 displays a monochrome image of the primary color image signals 32, 34, and 36 (s30). When the light is emitted by the projection of the monochrome CRT display 18, the CPU 40 checks the number of times of light emission (s32).

The CPU 40 sets the light emission of three consecutive monochrome images of the red (R), green (G), and blue (B) primary color image signals 32, 34, and 36 as one unit of repeated light emission, and sets the light emission as one unit. Light emission of the monochrome CRT display 18 is repeated until the number of times reaches the set number of times of light emission. CPU
When confirming that the number of times of light emission has reached the set number of times of light emission, 40 drives the camera control unit 54 to close the shutter 24 (s34).

When the shutter 24 is closed, the CPU 40
A signal for instructing a film winding signal is input to the camera control unit 54, and the film winding motor 26 is driven. Thus, the silver halide film 38 is wound up by one frame (s36) and (s38). It is determined whether or not the count matches the number of frames (m) of the silver halide film 38 (s4).
0). That is, when the count is smaller than the number of frames (m) of the silver halide film 38, the above-described image capturing is repeated.

On the other hand, the count is set to the silver halide film 38.
When the number of frames (m) is matched, the film winding motor 26 is driven by the CPU 40 to rewind the silver halide film 38 (s42). When the silver halide film 38 is rewound, the entire operation of image capturing by the hard copy device 10 ends.

As described above, according to the apparatus of the first embodiment, when the power of the hard copy apparatus 10 is turned on, the CPU
40 reads out the brightness information of the photographing lens 22 and the sensitivity information of the silver halide film 38 from the camera control unit 54.

Then, the CPU 40 sets the display of three consecutive monochrome images related to the primary color image signals of red (R), green (G), and blue (B) as one unit of display repetition number, and reads out these. Monochrome CR based on the information
The number of display repetitions of the T display 18 is obtained. When the number of display repetitions is obtained, the CPU 40 allows the light carrying the image information to irradiate the silver halide film 38 by the obtained number of display repetitions.

As described above, in the hard copy apparatus 10 according to the first embodiment, since the predetermined operations of the respective units are surely linked by the CPU 40, the operation of manually setting the photographing conditions for each unit can be greatly reduced. Can be. In addition, the signal selection unit 14 determines whether each of the primary color image signals 32, 34, 3
6 is taken as a unit and read out in a predetermined order of blue, green and red, for example.

That is, a blue (B) image and a green (G) image are displayed in the first and second frames in which the amount of light emission is reduced due to the rising characteristics of the CRT display 18.
The image signals 36 and 34 of the image are obtained. And CR
By bringing the image signal 32 of a red (R) image having a weak light emission intensity into the third frame in which the light emission amount of the T display 18 is stable, the image signal 32, 34, 36 projected on the monochrome CRT display 18 is applied. The amount of light emission of each image can be easily balanced, and the amount of exposure to the silver halide film 38 of each color can be made substantially uniform. Therefore, the color of the obtained recorded image can be made as close as possible to the actual color of the subject.

It should be noted that the present invention is not limited to the above configuration, and various modifications are possible within the scope of the invention. For example, FIG. 5 shows a schematic configuration of an image display unit and a color filter unit of a hard copy apparatus according to another embodiment of the present invention.

In the figure, a light source 56 functioning as a backlight and a monochrome liquid crystal display (LCD) 58 are used as image display means. Then, whether the monochrome liquid crystal display (LCD) 58 transmits or blocks the light from the light source 56 is controlled based on a change in a voltage applied to the monochrome liquid crystal display (LCD) 58 applied to the image signal.

In the same figure, a color liquid crystal display 60 is used as a color filter means. The color liquid crystal display 60 shows colors corresponding to the primary color image signals 32, 34, and 36 of the image displayed by the monochrome liquid crystal display (LCD) 58 on the entire surface.

As described above, the light source 56 and the monochrome liquid crystal display 58 are used as the image display means instead of the monochrome CRT display 18 shown in the first embodiment.
Further, even if a color liquid crystal display 60 is used as the color filter means instead of the color wheel 20 shown in the first embodiment, the same effect as in the first embodiment can be obtained.

In the first embodiment, when the hard copy device 10 is turned on, the camera control unit 54 automatically reads the brightness information of the photographing lens and the sensitivity information of the silver halide film. Although described, the present invention is not limited to this.
When the power source is turned on, an initial setting screen is displayed on the liquid crystal display 52, so that the operator can input these pieces of information from the manual input means 50 while viewing the screen.

In the first embodiment, the case where the operator manually inputs the number of frames (m) of the silver halide film from the manual input means 50 while looking at the initial setting screen has been described. Instead, when the power of the hard copy device 10 is turned on, the camera control unit 54
It is also possible to adopt a configuration in which the number of frames (m) of the silver halide film is automatically read together with the brightness information of the photographing lens and the sensitivity information of the silver halide film. In addition, in the first embodiment, the case where the signal selection unit 14 reads each primary color image signal in the order of blue (B), green (G), and red (R) has been described. G), blue (B), and red (R) may be read in this order.

[0052]

As described above, according to the hard copy apparatus of the present invention, the video signal generating means is provided with red, green,
Since each video signal corresponding to the blue primary color image is to be generated in the order of green, blue, red or blue, green, and red based on a plane-sequential or line-sequential method, a The video signals of the green and blue images are located in the first and second frames where the light emission amount is slightly reduced, and the light emission amount of the image display means is compared with the first or second frame.
The video signal of the red image whose light emission intensity is weak is located in the third frame, which is stable in a high state, so that the light emission amount of each image projected on the image display means can be easily balanced, and each color tone can be easily adjusted. Can be made substantially uniform. Therefore, the color tone of the obtained recorded image can be made closer to the actual color tone of the subject without any trouble as in the related art.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a schematic configuration of a hard copy device according to a first embodiment;

FIG. 2 is a plan view of a color wheel of the apparatus shown in FIG. 1;

FIG. 3 is a flowchart showing the operation of the apparatus shown in FIG. 1;

FIG. 4 is an explanatory view of the operation of the device shown in FIG. 1;

FIG. 5 is an explanatory diagram of a schematic configuration of an image display unit and a color filter unit of the hard copy device according to the second embodiment.

[Explanation of symbols]

 Reference Signs List 10 hard copy device 12 video signal output unit (video signal generation unit) 14 signal selection unit (video signal generation unit) 16 light emission control circuit (video signal generation unit) 18 monochrome CRT display (image display unit) 20 color wheel (color filter) Means 22 Shooting lens (Shooting lens means) 24 Shutter (Shutter means) 26 Film winding motor (Film arranging means) 40 CPU (Control means)

Claims (2)

[Claims] 1. A video signal generating means for color-separating a color video signal to sequentially generate video signals corresponding to red, green, and blue primary color images, and luminance information of each video signal from the video signal generating means. Image display means for sequentially displaying images corresponding to the primary color images, and a filter of a color corresponding to each image displayed on the image display means, the image display being synchronized with a display switching timing of each image. Color filter means for entering in front of the means, photographing lens means for forming each image from the image display means on a silver halide film surface, and image information from the image display means through the filter of the predetermined color And a film arranging means for arranging the silver halide film to be superposed and exposed at a predetermined position, on a common optical axis, and further, at each of the means arranged on the common optical axis. In a hard copy apparatus including a control unit for controlling an operation, the video signal generating unit converts each video signal corresponding to a red, green, and blue primary color image into green, blue, red or blue, green, and red in order. The control means generates the continuous three monochrome images related to the red, green, and blue video signals as one unit of repeated display, and generates the predetermined information. The number of display repetitions by the image display means of light carrying each piece of image information for irradiating the surface of the silver halide film is determined so that the exposure amount of the silver halide film becomes an appropriate value. A hard copy device for permitting the light carrying the image information to irradiate the silver halide film. 2. The hard copy device according to claim 1, wherein the predetermined information is at least brightness information of the photographing lens and sensitivity information of the silver halide film.