JPH03268021A - Color display hard copy device - Google Patents

Abstract

PURPOSE:To exactly photograph the color of an object to be photographed even if a photosensitive characteristic of a film is not uniform by a color at the time of taking a hard copy by mixing each color of R, G and B in a prescribed ratio at every color thereof. CONSTITUTION:To each terminal of R, G and B, each color signal of red, green and blue is supplied, and they are supplied to matrix circuits 11 - 13. Subsequently, in each matrix circuit 11 - 13, at every color of R, G and B, other color is mixed independently in a prescribed ratio. For instance, the circuit of a red signal mixes some green and blue signals to the red signal and corrects a red color, and therefore, in an attenuator 11a for the red signal, attenuation scarcely exists, and in other attenuators 11b, 11c for a green color and a blue color, the attenuation is large, and its attenuation is determined suitably in accordance with the correction quantity. In such a way, even if a color photosensitive characteristic of a film is not uniform, a photographed color comes to reproduce faithfully a color of an actual object to be photographed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a display hard copy device for hard copying a display screen.

[Prior Art] Various types of display hard copy devices have been proposed, but when making a hard copy of a color image, it is difficult to take a photograph of what is displayed on a color cathode ray tube.
The pixels are noticeable, making it impossible to take detailed photos. Therefore, a monochrome cathode ray tube was used, and RGB
Each color is sequentially switched and displayed, and the image on the display screen is passed through an RGB filter in synchronization with the switching timing, and the filter output is photographed on a color film. In this way, the three colors of RGB are exposed to the same color film, and a fine color image is recorded.

[Problems to be Solved by the Invention] However, in such a conventional device, since the color sensitivity characteristics of the film are not uniform, the photographed colors may not faithfully reproduce the colors of the actual subject.

[Means for Solving the Problems] In order to solve these problems, the present invention provides R, G,
It is equipped with a mixer that independently mixes each color of H with other colors at a predetermined ratio.

[Operation] If each color of R, G, and B is corrected and the correction is adapted to the characteristics of the film, the color of the subject can be accurately reproduced.

[Embodiment] Fig. 6 is a block diagram showing an embodiment of the present invention. In Fig. 6, each terminal of R, G, and B is supplied with each color signal of red, green, and blue, and these signals are connected to a matrix circuit. 1□
, 3-z, Is. The inside of the matrix circuit with symbol 1□ is shown as R, G,
Attenuators 11&, 1xb, 11(+
and a mixer 11 for mixing the attenuator output. It is composed of I. Among these matrix circuits, for example, the red signal circuit is explained. This circuit corrects the red color by mixing some green and blue signals with the red signal. Therefore, the red signal attenuator 1 , has almost no attenuation, and the other green and blue attenuators 11b and ltc have a large attenuation, and the attenuation is determined as appropriate according to the correction amount. The same applies to the other matrix circuits 12 and Is, and the green component is corrected with red and blue, and the blue component is corrected with green and red.

The signals subjected to color correction in this manner are sequentially switched by the switch 2 and displayed on the cathode ray tube 3. Therefore, on the cathode ray tube 3, a red signal image, a green signal image, and a blue signal image are sequentially displayed. Therefore switch 2
If you switch the filter 4 in synchronization with the switching timing of , so that the filter is the same as the display color, and leave the shutter of the camera 5 open while taking pictures, the carafe and illumination (not shown) will have R and G colors. , B are exposed in sequence, and a color photograph can be taken. And R,G.

Even if the photosensitive characteristics of the film are not uniform depending on the color, the image can be photographed in the same color as the subject.

[Effects of the Invention] As explained above, in this invention, each color of R, G, and B is mixed at a predetermined ratio for each color, so when making a hard copy, the photosensitive characteristics of the film are not uniform depending on the color. This has the effect that the color of the subject can be photographed accurately even when the subject is photographed.

[Brief explanation of drawings]

The figure is a block diagram showing one embodiment of the present invention. 1...Matrix circuit, 2...Switch, 3...
...Brown tube, 4...filter, 5...camera.

Claims (1)

[Claims] A hard copy of a color image by sequentially switching and displaying each color of R, G, and B on a monochrome cathode ray tube, and photographing the displayed image on a color film through a corresponding color filter in synchronization with the switching. 1. A color display hard copy device comprising: a matrix circuit that independently mixes each of R, G, and B colors with other colors at a predetermined ratio.