JPH0597172U - Image signal adjustment device for printer device - Google Patents

Abstract

(57) [Abstract] [Purpose] When a video image captured by a television camera or the like is printed by the printer device, the printer can judge the black-and-white level of the image signal for optimizing the printing, thereby simplifying the level adjustment. An image signal adjusting device for a device is obtained. A black and white level adjusting circuit 4a for adjusting a black and white level by receiving a video signal input from a television camera, a sampling position adjusting circuit 4e for adjusting a horizontal sampling position of an image signal, and sampling at an adjusted position. A sampling circuit 4b, a level display waveform generating circuit 4c for obtaining a level display waveform of a sampled image signal with respect to an appropriate black and white level, and a video signal via the black and white level adjusting circuit 4a and a level display output from the level display circuit 4c. Mixing circuit 4d for obtaining mixed output with waveform
And a level display waveform 9 of a black-and-white level at a predetermined sampling position together with the image signal of the object is displayed on the display to visually check the white or black level, and the level can be manually adjusted by the black and white level adjusting circuit 4a. Is configured.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a printer device, and more particularly, to an image signal adjusting device of a printer device for printing an image of a person's face such as a card printer.

[0002]

[Prior Art]

 Conventionally, there are card printers that print images and characters such as faces and names on business card-sized cards in order to create employee ID cards. In such a card printer, when an image is captured by a TV camera or a scanner and printed, the image signal is directly input to the host computer and the image of the subject on the display is visually observed while the image is bright or dark on the TV camera. We used a method such as adjusting the value or making a software correction using a host computer.

[0003]

[Problems to be solved by the device]

 However, in the conventional card printer described above, when capturing and printing the image captured by the TV camera, in the case of the method of adjusting the image brightness of the subject by observing the image of the subject on the display, the image is displayed on the display. Since the applied signal is controlled, even if the lightness and darkness is optimally adjusted on the display, the lightness and darkness of the image may be printed in a state that is not optimal for the printer.

For example, even if the output signal of the television camera is a little blackout (a signal state below the black level) or conversely a whiteout (a signal state above the white level), or even if it is a dark signal overall, it is monitored. Display may be displayed in good condition, but printing in printer may not be good. Further, it is difficult for the printer to compare the good and bad black and white levels only with the image of the subject.

The present invention has been made in order to solve such a problem, and an image of a subject captured by a television camera or the like and a black and white level at an appropriate sampling position within one horizontal period of the image signal are displayed on a display device. It is an object of the present invention to provide an image signal adjusting device for a printer device which can be simultaneously displayed on a printer and easily perform manual adjustment of the image signal for optimum printing.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, an image signal adjusting device for a printer device according to the present invention is a device that supplies an image signal to a printer device that prints an image captured by an image capturing device that captures an image of a subject. The black-and-white level adjustment circuit for manually adjusting the black-and-white level of the image signal obtained by the above, the sampling means for manually selecting the sampling position within one horizontal period of the image to be level-adjusted, and the selected sampling position The relationship between the level display waveform generation circuit that generates the level display waveform signal of the black and white level of the image in step (1) and the level display waveform and the appropriate black and white level is mixed by mixing the image signal and the level display waveform signal. And a mixing circuit for delivering the output for display on a display device.

[0007]

[Action]

 In the present invention, a sampling circuit for inputting an image by an image pickup device for picking up an object through a black and white level adjusting circuit sets a sampling position within one horizontal period of an image for level adjustment, and a level display waveform generating circuit. Generates a level display waveform signal of the black-and-white level of the image at the set sampling position, and the mixing circuit mixes the image signal and the level display waveform signal and outputs them for display on the display device. By being sent, the black-and-white level adjusting circuit enables manual adjustment of the black-and-white level of the image suitable for printing by the printer device based on the level display waveform displayed on the display device together with the image.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an overall schematic diagram showing an image signal adjusting device for a printer device according to the present embodiment. An image of the subject 1 whose predetermined illuminance is secured by the illumination device 2 is captured by the television camera 3, and the captured image signal is input to the host computer 5 via the image signal adjustment device 4 and displayed on the display 6. It is like this.

After the black and white level is adjusted by the image signal adjusting device 4 based on the image on the display 6, the image is output to the card printer 7 so that the image of the subject 1 whose brightness is adjusted by the card printer 7 is displayed on the card 8. The characters that are printed on the card 8 and that are keyed in from the host computer 5 are printed and issued on the card 8 together with the image.

Here, the image signal adjusting apparatus 4 is adapted to generate a level display waveform of the image signal, synthesize the image signal and the level display waveform, and output the synthesized signal to the host computer 5. Based on the input from the signal adjusting device 4, the image signal of the subject 1 and its level display waveform 9 are displayed on the display 6, as shown in FIG.

FIG. 2 is a specific circuit diagram of the image signal adjusting device 4 having a black-and-white level adjusting function. The image signal adjusting device 4 includes a black and white level adjusting circuit 4a for adjusting a black and white level by receiving a video signal input from the television camera 3 and a sampling position adjusting circuit 4e for adjusting a sampling position of the image signal within one horizontal period. And a sampling circuit 4b that performs sampling at a predetermined position in one horizontal period of the image signal based on the signal from the sampling position adjusting circuit 4e, and an appropriate black level and white level are set. The level display waveform generation circuit 4c for obtaining the level display waveform of the image signal sampled in a manner that clearly shows the relationship with the black and white levels, and the image signal and level display waveform generation circuit 4c via the black and white level adjustment circuit 4a. A mixing circuit 4d for obtaining a mixed output with the level display waveform outputted from The sampling position adjusting circuit 4e and the sampling circuit 4b collectively constitute sampling means.

According to the configuration described above, the device shown in FIGS. 1 and 2 operates as follows. The image signal of the subject 1 picked up by the television camera 3 is displayed on the display 6 via the image signal adjusting device 4 and the host computer 5 as shown in FIG. Here, in the image signal adjusting device 4, the black and white level adjusting circuit 4a adjusts the black and white level of the image signal, and the level of the image signal is adjusted by the variable resistor of the sampling position adjusting circuit 4e. The sampling position is adjusted, and as shown in FIG. 3, the sampling position can be moved horizontally in one horizontal period of the display screen of the display 6 and adjusted to an arbitrary point. It should be noted that it is desirable to generate pulse noise for each horizontal period at the sampling position and superimpose it on the image signal so that the user can visually check the sampling position on the display 6.

In the level display waveform generation circuit 4 c, the level display waveform 9 corresponding to the level from the sampling position shown in FIG. 3 to the waveform of the luminance signal or the RGB signal at the sample position of the subject 1 is displayed. Is displayed from the upper left of the screen to the bottom of FIG. For example, a bright part such as the background is horizontally long from the left side of the screen, and a dark part like hair is horizontally short and is displayed in proportion to the sampled waveform level. The level display waveform generating circuit 4c has a proportional relationship between the voltage holding circuit 4c-1 which holds the voltage sampled by the sampling circuit 4b for one horizontal period and the voltage holding circuit 4c-1 which converts the held voltage into a pulse width. And a voltage-pulse width conversion circuit 4c-3 for converting the output voltage of the gamma correction circuit 4c-2 as a signal having a pulse width corresponding to the voltage from the start of the next horizontal period. Have. The pulse signal of one horizontal period generated by the voltage-pulse width conversion circuit 4c-3 is superimposed on the image signal by the mixing circuit 4d as a level display waveform signal. If the maximum width from the black level to the white level of the level display waveform 9 displayed on the display 6 is set to be a fraction of the horizontal width of the raster, the image of the subject 1 will be displayed. It never disappears.

Therefore, according to the present embodiment, white crushing or black crushing, which cannot be conventionally determined, can be confirmed by looking at the waveform on the display 6. For example, when a signal with a black level or lower or a white level or higher is input as shown by the dotted line portion of the level display waveform 9 in FIG. 3, it cannot be determined only by the image of the subject 1, but the level display waveform shown in FIG. You can judge this by looking at 9.

Based on this level display waveform, the level display waveform 9 is adjusted by the black and white level adjustment circuit 4a so that the level display waveform 9 falls within a predetermined range between the proper black level and white level shown by the solid line in FIG. As a result, it is possible to correct the white underexposure and the underexposure, and it is possible to adjust the black and white level of the image suitable for printing by the card printer 7. The black-and-white level adjusting circuit 4a may be one that simply adjusts the level manually, but it is also preferable that it can manually control the signal dynamic range. In this case, for example, the black level can be adjusted first and then the dynamic range can be controlled or vice versa.

Further, the image of the subject 1 has different correction circuits depending on the type of the display 6, so that the brightness and the like change, but the level display waveform 9 corresponds to the input signal from the television camera 3 and the like, and the card printer Since it also corresponds to the signal output to the display unit 7 and is not affected by the correction circuit such as the display 6, the optimum image signal level for the card printer 7 can be adjusted.

Further, since the circuit configuration is simpler than the method of correcting the brightness and the like by the software inside the host computer 5 and the card printer 7, it can be easily manufactured and the cost is low. It can also be used for adjusting waveforms in the production process such as TV monitors and displays, during inspection, and during video editing, eliminating the need for waveform monitors and the work of connecting probes. It will be very effective.

[0018]

[Effect of the device]

 As described above, according to the present invention, since the level display waveform is simultaneously displayed on the display device together with the image, it is possible to judge a slight change in contrast of the image of the subject, and based on the level display waveform. Therefore, it is possible to adjust to an appropriate black and white level suitable for the printer device.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an image signal adjusting device for a printer device according to an embodiment of the present invention.

FIG. 2 is an internal configuration diagram of a signal adjusting device 4 in the embodiment of FIG.

FIG. 3 is an explanatory diagram showing a combined output of a video signal and a level display waveform displayed on a display 6 according to an embodiment of the present invention.

[Explanation of symbols]

 1 subject 3 TV camera 4 signal adjusting circuit 4a black and white level adjusting circuit 4b sampling circuit 4c level display waveform generating circuit 4d mixing circuit 4e sampling position adjusting circuit 6 display 7 printer

Claims (1)

[Scope of utility model registration request] 1. A device for supplying an image signal to a printer device for printing an image picked up by an image pickup device for picking up an image of a subject, wherein the black and white level of the image signal obtained by picking up the image is manually adjusted. A circuit and a sampling means for sampling while manually selecting a sampling position within one horizontal period of the image whose level is to be adjusted;
A level display waveform generating circuit for generating a level display waveform signal of a black and white level of an image at a selected sampling position, and the image display signal and the level display waveform signal are mixed to set the level display waveform to a proper black and white level. And an image signal adjusting device for a printer device, which has a mixing circuit for outputting an output to be displayed on a display device in a form that clearly shows the relationship of.