JPH0720259B2 - Video printing equipment - Google Patents

Description

The present invention relates to a video printing apparatus for performing color printing by subtractive color mixing.

<Outline of the Invention> The present invention is a video printing apparatus for printing a video signal so that a character print such as a description can be added to a margin portion of a photographic printing paper on which a video print is performed.

<Prior Art> Conventionally, a transfer sheet (yellow,
There is a video printing device that performs full color printing by subtractive color mixing using magenta and cyan). In this type of video printing apparatus, gamma correction is performed so that the light and shade of an image can be printed faithfully.

<Problems to be Solved by the Invention> However, such a conventional video printing apparatus is not provided with a function of continuously printing a description or the like in a margin of an image print.

<Means for Solving Problems> In the present invention, in addition to a normal video signal, a character signal based on a video signal, for example, a video output terminal is provided and a text creation screen is displayed on a TV.
The video signal of a Japanese word processor, which can be displayed at, is input, gradation correction is performed so that it is easier to read as characters, and printing is subsequently performed below the image print.

<Operation> Therefore, the description and the like can be easily printed under the image print.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a printing apparatus of the present invention. In this printing apparatus, a video signal from a normal movie signal output apparatus 1 and a video signal from a character signal output apparatus 2 by a video signal are used. Video signal is input.

When performing normal color printing, the control unit 13 sets the input switching circuit 13 to the input from the normal video signal output device 1 and inputs the video signal. The input video signal is converted into an RGB signal by the RGB decoding circuit 4 and input to the RGB selection circuit 5. The control unit 13 first uses RGB to print the Blue signal.
Set the selection circuit 5 to the Blue signal input and set the A / D conversion circuit 6
The timing circuit 8 is set to the timing of taking in the data of the first horizontal period of the Blue signal digitally converted by. The timing circuit 8 takes timing of the horizontal synchronizing signal and the vertical synchronizing signal output from the RGB decoding circuit 4, and among the Blue signals input to the data acquisition control circuit 7,
The data of the designated one horizontal period is stored in the γ correction data storage unit 9
Output to. In the γ correction data storage unit 9, the correction data such that the print data becomes the gamma value = 1 with respect to the gamma value of the input digital signal is transferred and stored in advance from the control unit 13. An example of this correction data is shown in FIG.

When data for one horizontal period is input to the γ correction data storage unit 9, the gamma correction data corresponding to the digital gradation data is sequentially read and stored in the print data storage unit 10. The print data stored in the print data storage unit 10 is gradation processed by the gradation processing circuit 11 and output to the line thermal head 12. A head control signal is input to the line thermal head via a thermal head control circuit 14, and printing is performed based on this head controller signal. When the printing of the data for one horizontal period is completed, the printing paper (not shown) is sent for one horizontal period, and the control unit 13 newly sets the timing for fetching the data for the next one horizontal period in the timing circuit 8. Then, the data for the next one horizontal period is printed. By repeating the above operation, the print of the blue signal for one screen-the dye of the complementary color is transferred to the printing paper, so the yellow print on the printing paper-is completed, and then the control unit 13 starts the printing paper printing position. Then, the RGB selection circuit 5 is switched to the Green signal input. Then, as in the case of the blue signal, printing of the green signal for one screen-magenta of the complementary color on the printing paper-is performed in an overlapping manner. Red signal is also printed for one screen-Cyan print of complementary color on photographic paper-
Are repeated to complete the color print by subtractive color mixing. (Part A in FIG. 5) An example of this print is shown in FIG.

In addition to color printing, if you want to print characters on the blank area of the same printing paper, you can use Blu-ray from the normal video signal output device 1.
After the printing of the e, Green and Red signals is completed and the color printing of the image is completed, the control unit 13 sets the input switching circuit 3 to the input from the character signal output device 2 by the video signal and sets the character signal by the video signal. Enter. Further, the control unit 13 determines that the gamma correction values transferred and stored in the γ correction data storage unit 9 are all black from the black level to a certain level of the video signal, and are all white from the certain level to the white level. Reset to the binary conversion correction value. Third example of this binary conversion correction data
Shown in the figure.

After changing the input and resetting the γ correction data, print the character signal by the video signal in the same way as for a normal video signal, and continue to the lower margin of the photographic printing paper on which the above-mentioned image color printing was performed. To do. (FIG. 4, part B) Therefore,
In the case of character printing, for example, if the character is cyan on a white background, the cyan color, which is the complementary color of the Red signal, will be printed without intermediate gradation due to the binary conversion correction data. If the above printing is performed, a character print in cyan can be added below the color print image resulting from the subtractive color mixing. An example of this print is shown in FIG.

<Effects of the Invention> With the configuration described above, it is possible to easily add a character print such as a description to the margin of the photographic printing paper on which the image is printed. Further, since the character print is gradation-corrected by the binary conversion correction data, it is clear and easy to read.

Further, in the present invention, the image processing is switched between color printing and character printing by rewriting the data in the γ correction data storage unit, so that the circuit configuration can be simplified.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing normal gamma correction data, FIG. 3 is a diagram showing binary conversion gamma correction data, and FIG. 4 is a character on an image color print. FIG. 5 is a diagram showing a print example in which a print is added, and FIG. 5 is a diagram showing a print example of only an image color print. 1 ... Ordinary movie signal output device, 2 ... Character signal output device by video signal, 3 ... Input switching circuit, 4 ... RGB decoding circuit, 5 ... RGB selection circuit, 6 ... A / D conversion circuit ,
7 ... Data acquisition control circuit, 8 ... Timing circuit, 9
...... γ-correction data storage unit, 10 ...... Print data storage unit, 11 ...... Gradation processing circuit, 12 ...... Line thermal head, 13 ...... Control unit, 14 ...... Thermal head control circuit.

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Claims (1)

[Claims] 1. A video printer, comprising a storage unit for storing gamma correction values, which performs gamma correction on an input video signal through the storage unit, and prints the corrected video signal. Input terminal for inputting a video signal of a character, an input switching section for switching the input of the two systems, etc., and a memory for storing the gamma correction according to the switching of the input switching section. And a control unit for setting different gamma correction values for each unit, and for the storage unit for storing the gamma correction value, sets the gamma correction value for the image signal of the image at the time of video printing the image and prints the character. A video printing device characterized in that a clear character print can be added to an image print by sometimes setting a binary conversion gamma correction value and printing.