JPH08205065A - Method for confirming input signal waveform of hard copying machine - Google Patents

Abstract

PURPOSE: To provide a method for confirming the input signal waveform of a hard copy machine reproducing an observed waveform without special provision for a measurement equipment measuring the video input signal waveform. CONSTITUTION: The machine is provided with a CPU 1, a detection means 2 detecting a video input signal 7 and converting the signal into a detected value 12, a conversion means 3 converting a video input signal 7 into input information 8 based on a setting value 13 set by each color signal with the CPU l from the detected value 12, a print information storage means 4 storing the input information 8, a print means 5 printing out print information 9 from the print information storage means 4, and an operation display means 6 displaying the operating state of a hard copy, a detection value storage means 14 storing the detected value 12 detected by the detection means 2 and a visualizing means, and when a print condition is set, the video input signal 7 is reproduced as waveform information 16 based on the detection information 15 of the detection value storage means 14 and stored in the print information storage means 4 and the waveform information 16 stored in the print information storage means 4 is visualized by the visualize means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for checking an input signal of a hard copy apparatus, which analyzes a video input signal by a sensor in a self apparatus and automatically sets printing conditions.

[0002]

2. Description of the Related Art FIG. 5 shows a block diagram of a conventional hard copy apparatus. In FIG. 5, the hard copy device detects a central processing unit (hereinafter, the central processing unit is referred to as a CPU) 1 that controls the control operation of the entire device, and a video input signal 7. The CPU 1 outputs a set value 13 for setting a range from a vivid color to a dark color for each color signal from the detection means 2 for converting into the detection value 2 and the detection value 12 detected by the detection means 2 and based on the set value 13. A conversion means 3 for converting the video input signal 7 into a digital value, a print information storage means 4 for storing the digitalized input information 8, and a print means 5 for printing the print information 9 from the print information storage means 4. And an operation display unit 6 for displaying the operation state of the hard copy.

In such a configuration, when the printing conditions of the hard copy device have already been set, the conversion means 3 inputs the video input signal 7 from a clear color to a dark color for each color signal set by the CPU 1 described above. The input information 8 is converted into a digital numerical value by the set value 13 for setting the upper limit value and the lower limit value of the signal and stored in the print information storage means 4. Then, the print means 5 prints the print information 9 from the print information storage means 4 and prints the printed matter 10 which is the print output.

Next, when initializing the printing conditions of the hard copy device or when it is desired to improve the print quality of the printed matter 10 which is the print output, the printing conditions are reset, that is, the hard copy color tone is automatically adjusted. Be seen. In such a case, in the conventional hard copy apparatus, the detection means 2 detects the timing and signal level of the video input signal 7, and the CPU 1 determines the set value 13 based on the detected value 12.

FIG. 4 shows an example of the video input signal 7. For example, the image taken by the imaging device is red,
The green and blue image input signals 7 are input to the hard copy device. The illustrated example shows the red video input signal 7 among these, and the CPU 1 receives the detection value 12 corresponding to one screen, and based on the calculation program built in the CPU 1 in advance, from clear red to dark color. Red upper limit value 13R up to (black)
And set the lower limit of red color 13B to be treated as black.
The video input signal 7 is converted into the above set value 13 by the conversion means 3.
Based on the above, the setting range is A / D converted as shown by fine lines with fine intervals, stored as the input information 8 in the print information storage means 4, and printed by the print means 5.

In the conventional method, the state of the image input signal 7 can be confirmed when a printing defect occurs, by visually confirming the value of the set value 13 on the operation display means 6 or by printing, or by storing printing information. The numerical value of the input information stored in the means 4 is read out on the operation display means 6 and confirmed.

[0007]

In such an input signal waveform confirmation method for a hard copy device of the prior art, only the set value automatically set by the central processing unit or the input information converted based on this set value is used. It was not possible to check it, and there was no function to check the status of the input video input signal itself. Therefore, when a problem occurs in the hardcopy device, a measuring instrument such as an oscilloscope for observing the video input signal waveform is separately used to check whether the cause is the hardcopy device side or the video input signal waveform. I had to prepare.

The present invention has been made in view of the above points, and an object thereof is to solve the above-mentioned problems and to input a video image without separately preparing a measuring instrument such as an oscilloscope for observing a video input signal waveform. An object of the present invention is to provide a method for confirming an input signal waveform of a hard copy device that reproduces a signal waveform.

[0009]

In order to achieve the above object, according to the present invention, a central processing unit that controls the entire control operation, a detection unit that detects a video input signal, and a video input that is detected by this detection unit. A conversion means for converting the signal into a digital value based on a set value set by the central processing unit for each color signal; and a print information storage means for storing the value of the digitalized input signal. In the input signal waveform confirmation method of the hard copy device, which comprises the printing means for printing the printing information from the printing information storage means and the operation display means for displaying the operation state of the hard copy, the image detected by the detecting means. Detection value storage means for storing detection information of the input signal, visualization means,
When confirming the video input signal, the video input signal is reproduced as waveform information based on the detection information of the detection value storage means, stored in the print information storage means, and the waveform stored in the print information storage means. Information shall be visualized by visualization means.

The visualizing means uses a printing means. Moreover, the operation display means is used as the visualization means. Further, the external display means is provided, and the visualization means uses the external display means. Also, an external terminal device,
External terminal interface means for performing communication between the external terminal device and the hard copy device, and the waveform information stored in the print information storage means is transferred to the external terminal device via the central processing unit and the external terminal interface means. Transmitted to
An external terminal device is used as the visualization means.

[0011]

According to the present invention, in order to confirm the state of the video input signal input to the hard copy device, the detection value storage means stores the detected values detected by the detection means of the hard copy device. Then, the central processing unit performs the time-voltage graph display processing based on the detection information stored in the detection value storage means, reproduces the video input signal waveform as the waveform information, and stores it in the print information storage means. The waveform information stored in the print information storage means is visualized by the visualization means.

This visualizing means is a printing means by a printing means,
The waveform information can be visualized as the reproduced image input signal waveform by the display by the operation display means, the display by the external display device, or the display by the external terminal device.

[0013]

1 is a block diagram of a first embodiment for explaining an input signal waveform confirmation method of a hard copy apparatus according to the present invention,
2 is a block diagram of the second embodiment, and FIG. 3 is a block diagram of the third embodiment. The same functional members corresponding to FIGS. 4 and 5 are designated by the same reference numerals.

Embodiment 1 (means for printing a video input signal waveform
Confirmation Method Using Operation Display Means) In FIG. 1, the hard copy device detects the CPU 1 that controls the entire control operation of the device and the video input signal 7, and detects the CP.
From the detection means 2 which U1 converts into a detection value 12 which is easy to process, and the detection value 12 detected by this detection means 2, the CPU 1 outputs a set value 13 for setting a range from a clear color to a dark color for each color signal. The conversion means 3 for digitizing the video input signal 7 on the basis of the set value 13, the printing information storage means 4 for storing the digitized digitalized input information 8 shown in FIG. 1 and the printing information. The printing means 5 for printing the printing information 9 from the storage means 4, the operation display means 6 for displaying the operation state of the hard copy, the detection value 12 of the video input signal 7 detected by the detection means 2, and the detection information 15 A detection value storage means 14 for storing as, and a visualization means implemented by the printing means 5 or the operation display means 6 in the illustrated example of FIG.
Consists of

In such a configuration, when the printing conditions of the hard copy device have already been set, as described in the prior art, the video input signal 7 is set to an upper limit value / lower limit value from a clear color to a dark color for each color signal. By setting value 13 to set the range of
The conversion means 3 digitizes the video input signal 7 into input information 8 and stores it in the print information storage means 4. Then, the print means 5 prints the print information 9 from the print information storage means 4 and prints the printed matter 10 which is the print output.

Next, when initializing the printing conditions of the hard copy device or when it is desired to improve the print quality of the printed matter 10 which is the print output, the printing conditions are reset, that is, the hard copy color tone is automatically adjusted. Be seen. In the hard copy apparatus, the detection means 2 detects the timing of the synchronizing signal of the video input signal 7 and the video input signal level, and the detected value 12
Thus, the CPU 1 determines the set value 13.

Next, when a print defect occurs and it is desired to check the state of the video input signal 7, the video input signal 7 is reproduced and visualized by the following method. That is, the video input signal 7 is digitized by the detection means 2 as the detection value 12, and is stored as the detection information 15 in the detection value storage means 14. After the capturing of the video input signal 7 is completed, the CPU 1 causes the detection value storage means 14
The detection information 15 is read out from the memory, the time-voltage graph display processing is performed, the result is used as the waveform information 16 to reproduce the video input signal 7, and is stored in the print information storage means 4.
The waveform information 16 stored in the print information storage means 4 is obtained by printing the print information 9 in the print information storage means 4 by the print means 5 which is the visualization means, or by displaying it on the operation display means 6. In addition to the video signal, the synchronization signal and its waveform distortion can be visualized, and it is possible to easily find and infer the defective portion by visual confirmation.

Embodiment 2 (Confirmation Method of Video Input Signal Waveform by External Display Device) FIG. 2 shows a confirmation method of the video input signal waveform by the external display device. The block circuit configuration of FIG. 2 is provided with the external display means 17 and the external display device 20 in the circuit of FIG. 1 described in the first embodiment, and the waveform information 16 stored in the print information storage means 4 is the video information 18 Is output by the external display means 17 and output as a video output 19. The waveform information 16 is displayed on the external display device 20.
It is visually confirmed by displaying on. In this method, it is possible to sequentially confirm the change state of the waveform.

Embodiment 3 (Confirmation Method of Video Input Signal Waveform by External Terminal Device) FIG. 3 shows a confirmation method of the video input signal waveform by the external terminal device. The block circuit configuration of FIG. 3 includes the external terminal interface means 21 and the external terminal device 24 in the circuit of FIG. 1 described in the first embodiment, and the waveform information 16 stored in the print information storage means 4 is the external terminal. It is converted into communication information 23 by the interface means 21 and output to the external terminal device 24. The waveform information 16 is visually confirmed by the display device of the external terminal device 24. In this method, it is possible to store a plurality of pieces of waveform information at any time by using the storage means in the external terminal.

In the first to third embodiments, when a part of the area for printing or displaying an image is limited and the waveform information 16 is printed or displayed in the remaining area, for example, half the area (memory capacity) is used. Waveform information 16 is stored in
When the detected value 12 is stored in the other half, the display capacity of the waveform information 16 is reduced, but the detected value storage means 14 can be omitted and the print information storage means 4 can also be used.

[0021]

As described above, according to the present invention, by displaying the reproduced video input signal waveform on the printing or display device, the video input signal waveform can be displayed without separately preparing a measuring instrument such as an oscilloscope. The condition can be visually confirmed.

[Brief description of drawings]

FIG. 1 is a block diagram of a first embodiment for explaining an input signal waveform confirmation method of a hard copy device according to the present invention.

FIG. 2 is a block diagram of a second embodiment of the present invention.

FIG. 3 is a block diagram of a third embodiment of the present invention.

FIG. 4 is an explanatory diagram of A / D converting a video input signal within a set range.

FIG. 5 is a block configuration diagram of a conventional hard copy device.

[Explanation of symbols]

 1 central processing unit 2 detection means 3 conversion means 4 print information storage means 5 print means 6 operation display means 7 video input signal 8 input information 9 print information 10 print output 11 control signal 12 detected value 13 set value 14 detected value storage means 15 Detection information 16 Waveform information 17 External display means 18 Video information 19 Video output 20 External display device 21 External terminal interface means 22 Control information 23 Communication information 24 External terminal device

Claims (5)

[Claims] 1. A central processing unit for controlling the entire control operation, a detection unit for detecting a video input signal, and a setting set for each color signal by the central processing unit from the video input signal detected by the detection unit. Conversion means for converting the video input signal into a digital value on the basis of a value, print information storage means for storing the digitalized value of the video input signal, and print information from the print information storage means. In a method of confirming an input signal waveform of a hard copy device, comprising: a printing unit; and an operation display unit for displaying an operation state of a hard copy, a detection value for storing detection information of the video input signal detected by the detection unit. A storage means and a visualization means are provided, and when confirming the video input signal, the video input is performed as waveform information based on the detection information of the detection value storage means. And reproducing a signal, the waveform information is visualized by the visualization means, the input signal waveform confirmation method of a hard copy apparatus characterized by. 2. The input signal waveform confirmation method for a hard copy device according to claim 1, wherein the visualization means uses a printing means. 3. The input signal waveform confirmation method for a hard copy device according to claim 1, wherein the visualization means uses an operation display means. 4. The input signal waveform confirmation method for a hard copy device according to claim 1, further comprising an external display means, wherein the visualization means uses the external display means. Confirmation method. 5. The input signal waveform confirmation method for a hard copy device according to claim 1, comprising an external terminal device and an external terminal interface means for communicating between the external terminal device and the hard copy device. A waveform information stored in the print information storage means is transmitted to an external terminal device through a central processing unit and an external terminal interface means, and the visualization means uses the external terminal device. Input signal waveform confirmation method.