JP2002135812A - Image examining device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image examining device capable of easily designating a desired measuring position when a measuring person designates the measuring position. SOLUTION: An image examining means 1 stores image data generated by a lattice-like image generating means 13 in a storage means 12 and the data in the storage means 12 are converted to video signals by a signal generating means 11. A video signal synthesizing video signals from a measuring object 2 and video signals generated from the signal generating means 11 is outputted by a signal synthesizing means 10 and displayed on a synthetic image display means 3. By counting the number of lattices displayed on the synthetic image display means 3, the measuring person inputs coordinates with the vertical direction of the desired measuring position in the video signal from the measuring object 2 as a scan line number and the horizontal direction as time from the synchronizing signal of a scan line to a reading position designating means 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image inspection device and, more particularly, to an image inspection device having an image signal output obtained by synthesizing an image signal from an object to be measured and arbitrary image data.

[0002]

2. Description of the Related Art A conventional image inspection apparatus is disclosed in JP-A-6-28.
As in the image inspection apparatus described in Japanese Patent Application Laid-Open No. 9800, a measurer designates an arbitrary position in a video signal, measures a voltage value at the position, and calculates the amplitude and phase of the signal. .

[0003]

However, in the conventional image inspection apparatus, there is no scale or the like as a reference when designating a measurement position on a screen, and in order for a measurer to designate a desired measurement position, Since it is difficult to read the measurement position from the screen, it is necessary to repeat the trial many times to bring the measurement position closer to the desired measurement position. For example, when measuring the third packet of the multi-burst pattern, the measurer must specify the scanning line number of the position to be measured and the time position from the horizontal synchronization signal on the scanning line, but the measurement is performed from the screen. Because it is difficult to read the position, capture the waveform once with an oscilloscope or the like to determine the time position, or set the measurement position appropriately based on the experience and intuition of the measurer,
An operation of approaching a desired measurement position while repeating the trial was required.

An object of the present invention is to provide an image inspection apparatus capable of easily designating a desired measurement position when a measurer designates a measurement position in order to solve the above problem. .

[0005]

SUMMARY OF THE INVENTION The present invention relates to a grid-like image generating means for generating a grid-like image to be displayed by combining it with a video signal from a measurement object, and a grid-like image generated by the grid-like image generating means. Means for setting the number of grid divisions in the vertical and horizontal directions, storage means for storing image data generated by the grid-like image generation means, and signal generation for converting data in the storage means into video signals Means, a signal synthesizing means for outputting a video signal obtained by synthesizing a video signal from the measuring object and a signal generated by the signal generating means, and measuring a voltage value at an arbitrary position of the video signal from the measuring object. An image inspection apparatus includes a measurement unit that calculates the amplitude and phase of a signal, and a position specification unit that specifies a position of the measurement unit.

[0006] With this configuration, the measurer can view an image obtained by superimposing a grid, which is divided in the vertical direction by the number of scanning lines and in the horizontal direction by several μs, on the image of the video signal from the measurement object. Therefore, a desired measurement position can be easily read.

Further, according to the present invention, there is provided a grid image generating means for generating a grid image to be displayed by synthesizing it with a video signal from a measuring object, and a vertical and horizontal grid image generated by the grid image generating means. Grid division number setting means for setting each grid width in the direction; storage means for storing image data generated by the grid image generation means; signal generation means for converting data in the storage means into a video signal; A signal synthesizing unit that outputs a video signal obtained by synthesizing a video signal from the object and a signal generated by the signal generating unit; a synthesized image display unit that displays an output video signal of the signal synthesizing unit; A measuring means for measuring the voltage value of an arbitrary position of the video signal and calculating the amplitude and phase of the signal; a measuring result display means for displaying the amplitude and phase measurement results of the measuring means; and a means for designating the position to the measuring means. An image inspection device and a location specifying means.

[0008] With this configuration, the measurer can use the composite image display means to divide the image of the video signal from the object to be measured into a grid-like image that is divided every few scanning lines in the vertical direction and every several μs in the horizontal direction. Since it is possible to see an image obtained by superimposing, the desired measurement position can be easily read.

The present invention further provides a marker image generating means for generating a marker image displayed at a position designated by the position designating means and storing the marker image in a storage means, and an image of a measurement result calculated by the measuring means. And a measurement result image generation means for generating the measurement result image in the storage means.

Further, the present invention is an image inspection apparatus having a waveform graph image generating means for generating a graph image of waveform data of an arbitrary scanning line number of a video signal taken in by a measuring means and storing it in a storage means.

[0011] With this configuration, the measurer can view an image in which the waveform of the scanning line including the desired measurement position is superimposed on the image of the video signal from the measurement object from the composite image display means. Can be easily analyzed from the graph.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an image inspection apparatus according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows an image inspection apparatus according to a first embodiment of the present invention.

In FIG. 1, an image inspection apparatus 1 generates a grid-like image generating means 13 for generating a grid-like image to be displayed by synthesizing it with a video signal from a measuring object 2 and a grid-like image generating means 13. A grid division number setting unit 14 for setting the respective grid widths of the grid image in the vertical and horizontal directions, a storage unit 12 for storing image data generated by the grid image generation unit 13, and data in the storage unit 12. A signal generating means 11 for converting the image signal from the measuring object 2 and a video signal generated by the signal generating means 11 into a video signal; Composite image display means 3 for displaying an output video signal
Measuring means 15 for measuring the voltage value of the video signal from the measurement object 2 at an arbitrary point in time and calculating the amplitude and phase of the signal
And a measurement result display means 4 for displaying the amplitude and phase measurement results of the measurement means 15, and a position designation means 16 for designating the measurement position on the measurement means 15.

The operation of the image inspection apparatus 1 configured as described above will be described.

First, the respective grid widths of the grid image in the vertical and horizontal directions are inputted by a keyboard which is the grid division number setting means 14. The vertical direction of the grid is set in accordance with the NTSC (National Television System Committe
e) In the case of the method, PAL (Phase Alter
(nation by Line System) method, the number may be divided into any number from 1 to 625, but considering the easiness of counting by the measurer and the visibility of the screen, it is appropriate to divide the number from 10 to 100. . 1 to 1 for other signal types
Any number up to the number of scanning lines on the screen may be used. The horizontal direction of the grid may be divided by an arbitrary time width up to about 63 μs, but it is appropriate to divide the grid every 2 μs to 10 μs in consideration of the ease of counting by the measurer and the visibility of the screen. The lattice image generation circuit, which is the lattice image generation means 13, generates lattice image data based on the vertical and horizontal lattice widths input to the keyboard, and stores the lattice image data in the DRAM, which is storage means.

FIG. 2 shows the structure of image data according to the embodiment of the present invention. As shown in FIG. 2, 16 bits × 6
Four images are arranged in series to represent an image of one scanning line. The 16th bit of the first data is set to 0 μs, the 15th bit is set to 0.1 μs, and the 14th bit is set to 0.2 μs. This set is prepared for the number of scanning lines.

Referring again to FIG. 1, although the storage means 12 is a DRAM in the embodiment of the present invention, other storage means may be used. In the embodiment of the present invention, the storage unit 12
Is set to 64K words so that data for 625 scanning lines in the case of the PAL method can be stored at a resolution of 0.1 μs, but may be larger. The D / A converter as the signal generating means 11 generates a video signal obtained by D / A converting data in the DRAM. A subject is photographed by a TV camera, which is a measurement object 2, and the output video signal is output to an image inspection apparatus 1
To enter. The signal synthesis circuit as the signal synthesis means 10 includes:
The video signal input from the TV camera and the signal generated from the DRAM data input from the D / A converter are combined and output to the TV monitor as the combined image display means 3.

Next, the operation of the signal synthesizing circuit of the present invention will be described with reference to FIG.
This will be described with reference to FIG.

As shown in FIG. 3, in accordance with the data stored in the DRAM, the D / A converter sets a pixel position for drawing an image for each scanning line to Hi and a pixel position for no display to Lo.
Is generated. The Hi level can be set in the range of 0 V to 1 V, but about 0.2 V to 0.4 V is appropriate. The Lo level is set to 0V. Signal synthesis means 10
Superimposes a rectangular wave from the signal generation means 11 and a corresponding scanning line of a video signal from a TV camera normalized to 1 V [PP]. In the synthesized video signal, the pixel position where the image data of the DRAM is drawn has a higher luminance than the surrounding pixels, and the measurer can identify the superimposed image. By doing so, an image in which a grid is superimposed on the image of the subject is displayed on the TV monitor. The subject to be photographed may be an arbitrary pattern such as a color bar pattern or a multiburst pattern. Also, the composite image display means 3
Is a TV monitor in the embodiment of the present invention, but other display means capable of displaying a video signal may be used.

By measuring the grid displayed on the TV monitor, the measurer can read the coordinates of the desired measurement position of the subject image with the scanning line number in the vertical direction and the time in the horizontal direction from the synchronization signal of the scanning line. An input is made to a keyboard which is the designating means 16. Although the position specifying means 16 is a keyboard in the embodiment of the present invention, other position specifying means may be used. The keyboard may have the functions of the grid division number setting means 14 and the position designation means 16.

The measuring program as the measuring means 15 is T
The video signal from the V camera is sampled at 20 M data / sec, amplitude data is obtained, and the amplitude of the designated coordinates is obtained. In the first embodiment of the present invention, the sampling rate is set to 2 in order to reproduce the waveform with a resolution of 0.1 μs.
Although the data rate is 0M data / sec, a higher sampling rate may be used. Also, the absolute phase of the burst is calculated from the amplitudes of several points of the burst signal, the absolute phase of the coordinates is calculated from the amplitudes of several points near the designated coordinate position, and the difference is calculated to obtain the absolute phase of the designated coordinates. Calculate the phase. The calculation results of the amplitude and the phase are displayed on a liquid crystal display as the measurement result display means 4. The measurement result display means 4 is a liquid crystal display in the embodiment of the present invention, but may be another display means such as a CRT display. Further, the measurement result display means 4 may be incorporated in the image inspection apparatus.

As described above, according to the first embodiment of the present invention, by providing a mechanism for superimposing and displaying a grid for reading coordinates on an image from a TV camera, a measurer can display the image on the TV monitor. The desired measurement position can be read more easily than above, and the measurement position can be specified in a short time.

Next, an image inspection apparatus according to a second embodiment of the present invention is shown in FIG.

In FIG. 4, the image inspection apparatus 1 generates a grid-like image generating means 13 for generating a grid-like image to be displayed by synthesizing it with a video signal from the measuring object 2, and a grid-like image generating means 13. A grid division number setting unit 14 for setting each grid width in the vertical and horizontal directions of the grid image, and a voltage value at an arbitrary point in time of a video signal from the measurement object 2 is measured to calculate the amplitude and phase of the signal. Measuring means 15 and position specifying means 1 for specifying a position at which measurement is performed on measuring means 15
6, marker image generating means 17 for generating a marker image displayed at the position specified by the position specifying means 16,
A measurement result image generation unit 18 that generates an image of the measurement result calculated by the measurement unit 15, and a grid image generation unit 1
3, an output image of the marker image generation unit 17, and an output image of the measurement result image generation unit 18, and a signal generation unit 11 for converting data in the storage unit 12 into a video signal. And a signal synthesizing unit 10 for outputting a video signal obtained by synthesizing a video signal from the measuring object 2 and a signal generated by the signal generating unit 11, and a synthesized image display unit for displaying an output video signal of the signal synthesizing unit 10. 3
And a measurement result display means 4 for displaying the amplitude and phase measurement results of the measurement means 16.

The operation of the thus configured image inspection apparatus according to the second embodiment of the present invention will be described with reference to FIG.

First, the respective grid widths of the grid image in the vertical and horizontal directions are input by the keyboard which is the grid division number setting means 14. The vertical direction of the grid is from 1 to 525 in the case of the NTSC system in accordance with the video signal system.
In the case of the method, the number may be divided into any number from 1 to 625, but considering the ease of counting by the measurer and the visibility of the screen, it is appropriate to divide every 10 to 100 lines. In the case of other signal systems, the signal may be divided by an arbitrary number from 1 to the number of scanning lines of one screen. The horizontal direction of the grating is about 63 μs
The interval may be set at any time interval up to, but considering the ease of counting by the measurer and the visibility of the screen, it is appropriate to set the interval at intervals of 2 μs to 10 μs. The grid image generating circuit, which is the grid image generating means 13, is provided with a vertical
Grid image data is generated based on the grid width in the horizontal direction, and stored in the DRAM as the storage unit 12.

Referring again to FIG. 2, the structure of image data according to the embodiment of the present invention will be referred to. As shown in FIG.
6 bits × 64 data are arranged in series to represent an image of one scanning line. The 16th bit of the first data is set to 0 μs, and 1
One bit represents display / non-display of a grid image having a width of 0.1 μs in order, such as 0.1 μs for the fifth bit and 0.2 μs for the 14th bit. This set is prepared for the number of scanning lines. In the second embodiment of the present invention, the storage unit 12 is a DRAM
However, other storage means may be used. In the second embodiment of the present invention, the capacity of the storage means 12 is set to 64K words so that data of 625 scanning lines in the case of the PAL method can be stored at a resolution of 0.1 μs, but may be larger. DRA by the D / A converter which is the signal generation means 11
The data in M is generated as a D / A converted video signal. A subject is photographed by a TV camera, which is a measurement object 2, and an output video signal is input to the image inspection device 1. The signal synthesizing circuit as the signal synthesizing unit 10 synthesizes the video signal input from the TV camera and the signal generated from the DRAM data input from the D / A converter, and the TV monitor as the synthesized image display unit 3. Output to

Next, the operation of the signal synthesizing circuit according to the second embodiment of the present invention will be described with reference to FIG.

As shown in FIG. 3, in accordance with the data stored in the DRAM, the D / A converter sets a pixel position for drawing an image for each scanning line to Hi and a pixel position for no display to Lo.
Generate a square wave. The Hi level can be set in the range of 0 V to 1 V, but about 0.2 V to 0.4 V is appropriate. The Lo level is set to 0V. The signal synthesis means 10
The rectangular wave from the signal generating means 11 and each corresponding scanning line of the video signal from the TV camera normalized to 1 V [PP] are superimposed. In the synthesized video signal, the pixel position where the image data of the DRAM is drawn has a higher luminance than the surrounding pixels, and the measurer can identify the superimposed image.
By doing so, an image in which a grid is superimposed on the image of the subject is displayed on the TV monitor. The subject to be photographed may be an arbitrary pattern such as a color bar pattern or a multiburst pattern. Further, in the second embodiment of the present invention, the composite image display means 3 is a TV monitor, but may be another display means capable of displaying a video signal.

By measuring the grid displayed on the TV monitor, the measurer can read the coordinates of the desired measurement position of the subject image with the scanning line number in the vertical direction and time in the horizontal direction from the synchronization signal of the scanning line. An input is made to a keyboard which is the designating means 16. Although the position specifying means 16 is a keyboard in the embodiment of the present invention, other position specifying means may be used. The keyboard may have the functions of the grid division number setting means 14 and the position designation means 16. The marker image generating circuit, which is the marker image generating means 17, generates cross marker image data to be displayed at the designated coordinates, and performs a logical OR with the data stored in the DRAM. By taking the logical sum, the composite image data of the image data stored in the DRAM and the cross marker image data is stored in the DRAM. In the embodiment of the present invention, the marker image is a cross marker, but any other shape, numeral, character, or the like may be used.

The measuring means 15 samples the video signal from the TV camera at 20 M data / sec, acquires amplitude data, and obtains the amplitude of the designated coordinates. In the second embodiment of the present invention, the sampling rate is set to 20 M data / sec for the purpose of reproducing a waveform with a resolution of 0.1 μs, but a sampling rate higher than that may be used. Also, the absolute phase of the burst is calculated from the amplitudes of several burst signal points,
The absolute phase of the coordinate is calculated from the amplitudes of several points near the specified coordinate position, and the phase of the specified coordinate is calculated by taking the difference. The measurement result image generation circuit, which is the measurement result image generation means 18, converts the calculation result character string of the amplitude and the phase into image data, and performs an OR operation with the data stored in the DRAM. DRA by taking OR
Composite image data of the image data stored in M and the measurement result image data is stored in the DRAM.

The image finally displayed on the TV monitor as the composite image display means is an image in which a grid, a cross marker image indicating a measurement position, and a character string image of the measurement result are superimposed on the image of the subject. Further, the calculation results of the amplitude and the phase are displayed on a liquid crystal display as a measurement result display means. Although the measurement result display means is a liquid crystal display in the embodiment of the present invention, other display means such as a CRT display may be used. Further, the measurement result display means may be incorporated in the image inspection apparatus.

As described above, according to the second embodiment of the present invention, a mechanism for superimposing and displaying a grid for reading coordinates, a cross marker indicating a measurement position, and a measurement result character on an image from a TV camera is provided. With this arrangement, the measurer can easily read the desired measurement position on the screen of the TV monitor, and at the same time can check the measurement result, and can set the measurement position and acquire the measurement result in a short time. It can be performed.

Next, an image inspection apparatus according to a third embodiment of the present invention is shown in FIG.

In FIG. 6, the image inspection apparatus 1 generates a grid-like image generating means 13 for generating a grid-like image to be displayed by combining with a video signal from the measuring object 2 and a grid-like image generating means 13. A grid division number setting unit 14 for setting each grid width in the vertical and horizontal directions of the grid image, and a voltage value at an arbitrary point in time of a video signal from the measurement object 2 is measured to calculate the amplitude and phase of the signal. Measuring means 15, position specifying means 16 for specifying a position to measuring means 15, and waveform graph image generating means for generating an image of a graph of waveform data of an arbitrary scanning line number of a video signal captured by measuring means 15 19, a storage unit 12 for storing an output image of the lattice image generation unit 13 and an output image of the waveform graph image generation unit 19, and a signal generation unit for converting data in the storage unit 12 into a video signal. A stage 11, a signal synthesizing unit 10 for outputting a video signal obtained by synthesizing a video signal from the measuring object 2 and a signal generated by the signal generating unit 11, and a synthesized image displaying an output video signal of the signal synthesizing unit 10 Display means 3
And a measurement result display means 4 for displaying the amplitude and phase measurement results of the measurement means 16.

The operation of the thus configured image inspection apparatus according to the third embodiment of the present invention will be described with reference to FIG.

First, the respective grid widths of the grid image in the vertical and horizontal directions are input to the keyboard as the grid division number setting means 14. The vertical direction of the grid is from 1 to 525 in the case of the NTSC system in accordance with the video signal system.
In the case of the method, the number may be divided into any number from 1 to 625, but considering the ease of counting by the measurer and the visibility of the screen, it is appropriate to divide every 10 to 100 lines. In the case of other signal systems, the signal may be divided by an arbitrary number from 1 to the number of scanning lines of one screen. The horizontal direction of the grating is about 63 μs
The interval may be set at any time interval up to, but considering the ease of counting by the measurer and the visibility of the screen, it is appropriate to set the interval at intervals of 2 μs to 10 μs. The lattice image generation circuit, which is the lattice image generation means 13, generates lattice image data based on the vertical and horizontal lattice widths input to the keyboard, and stores the lattice image data in the DRAM, which is storage means.

Referring again to the structure of the image data shown in FIG. As shown in FIG. 2, 16 bits × 64 data are arranged in series to represent an image of one scanning line. 16 of the first data
The bit is 0 μs, the 15th bit is 0.1 μs, 1
One bit represents display / non-display of a grid image having a width of 0.1 μs in order of 0.2 μs in the fourth bit. This set is prepared for the number of scanning lines. In the third embodiment of the present invention, the storage unit 12 is a DRAM, but may be another storage unit. In the embodiment of the present invention, the capacity of the storage means 12 is set to 64K words so that data of 625 scanning lines in the case of the PAL method can be stored at a resolution of 0.1 μs, but may be larger. D /
The data in the DRAM is generated into a D / A converted video signal by the A converter. A subject is photographed by a TV camera, which is a measurement object 2, and an output video signal is input to the image inspection device 1. The signal synthesizing circuit which is the signal synthesizing means 10 is a TV.
A video signal input from the camera and a signal generated from DRAM data input from the D / A converter are combined,
It outputs to the TV monitor which is the composite image display means 3.

Next, the operation of the signal synthesis circuit according to the third embodiment of the present invention will be described with reference to FIG. As shown in FIG. 3, according to the data stored in the DRAM,
The D / A converter generates a rectangular wave that sets Hi to a pixel position for drawing an image and Lo to a pixel position not to be displayed for each scanning line. Hi level can be set in the range of 0V to 1V,
About 0.2V to 0.4V is appropriate. The Lo level is set to 0V. The signal synthesizing unit 10 superimposes the rectangular wave from the signal generating unit 11 and each corresponding scanning line of the video signal from the TV camera normalized to 1V [PP]. In the synthesized video signal, the pixel position where the image data of the DRAM is drawn has a higher luminance than the surrounding pixels, and the measurer can identify the superimposed image.

By doing so, an image in which a grid is superimposed on the image of the subject is displayed on the TV monitor. The subject to be photographed may be an arbitrary pattern such as a color bar pattern or a multiburst pattern. Although the composite image display means 3 is a TV monitor in the embodiment of the present invention, other display means capable of displaying a video signal may be used.

By measuring the grid displayed on the TV monitor, the measurer can read the coordinates of the desired measurement position of the subject image, where the vertical direction is the scanning line number and the horizontal direction is the time from the synchronization signal of the scanning line. An input is made to a keyboard which is the designating means 16. Although the position specifying means 16 is a keyboard in the embodiment of the present invention, other position specifying means may be used. The keyboard may have the functions of the grid division number setting means 14 and the position designation means 16. The measuring means 15 samples the video signal from the TV camera at 20 M data / sec, acquires amplitude data, and acquires the amplitude of the designated coordinates.

In the embodiment of the present invention, the sampling rate is set to 2 for the purpose of reproducing a waveform with a resolution of 0.1 μs.
Although the data rate is 0M data / sec, a higher sampling rate may be used. Also, the absolute phase of the burst is calculated from the amplitudes of several points of the burst signal, the absolute phase of the coordinates is calculated from the amplitudes of several points near the designated coordinate position, and the difference is calculated to obtain the absolute phase of the designated coordinates. Calculate the phase. The calculation results of the amplitude and the phase are displayed on a liquid crystal display as the measurement result display means 4. The measurement result image generation circuit, which is the waveform graph image generation unit 19, graphs the amplitude data obtained by the measurement unit 15 and performs a logical OR operation on the data stored in the DRAM. DRA by taking OR
Composite image data of the image data stored in M and the measurement result image data is stored in the DRAM. The image finally displayed on the TV monitor as the composite image display means 3 is an image in which a grid and a waveform graph image of the measurement position are superimposed on the image of the subject. The measurement result display means 4 is a liquid crystal display in the embodiment of the present invention, but may be another display means such as a CRT display. Further, the measurement result display means 4 may be incorporated in the image inspection apparatus.

According to the third embodiment of the present invention, by providing a mechanism for superimposing and displaying a waveform graph of a designated scanning line on a video signal from an object to be measured, On the screen of the display means, it is possible to compare the waveform of the image to be measured with the waveform, and to analyze the abnormality of the image based on the graph.

In the embodiment of the present invention, the object to be measured is described as a TV camera. However, a case where an object to be measured other than a TV camera may be handled.

[0046]

As described above, according to the present invention, a grid-like image generating means for generating a grid-like image to be displayed by combining with a video signal from a measuring object, and a grid-like image generated by the grid-like image generating means are provided. Grid division number setting means for setting the respective grid widths in the vertical and horizontal directions of the shape image, storage means for storing image data generated by the image generation means, and signal generation for converting data in the storage means to a video signal Means, a signal synthesizing means for outputting a video signal obtained by synthesizing a video signal from the measuring object and a signal generated by the signal generating means, and measuring a voltage value at an arbitrary position of the video signal from the measuring object. By having measuring means for calculating the amplitude and phase of the signal and position designating means for designating the position on the measuring means, the measurer is able to scan the image of the video signal from the measuring object every several scanning lines in the vertical direction. Separated into In addition, an image inspection apparatus having an excellent effect that a desired measurement position can be easily read because an image obtained by superimposing a grid-like image divided every several μs in the horizontal direction can be provided. Is what you can do.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an image inspection apparatus according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a structure of image data according to the embodiment of the present invention.

FIG. 3 is a block diagram for explaining an operation of the signal synthesis circuit according to the embodiment of the present invention;

FIG. 4 is a flowchart for explaining the operation of the image inspection apparatus according to the second embodiment of the present invention;

FIG. 5 is a block diagram illustrating a configuration of an image inspection apparatus according to a second embodiment of the present invention.

FIG. 6 is a block diagram illustrating a configuration of an image inspection apparatus according to a third embodiment of the present invention.

FIG. 7 is a flowchart for explaining the operation of the image inspection apparatus according to the third embodiment of the present invention;

[Description of Signs] 1 Image inspection apparatus 2 Object to be measured 3 Synthetic image display means 4 Measurement result display means 10 Signal synthesis means 11 Signal generation means 12 Storage means 13 Grid image generation means 14 Grid division number setting means 15 Measurement means 16 Position specifying means 17 Marker image generating means 18 Measurement result image generating means 19 Waveform graph image generating means

Claims (4)

[Claims] 1. A grid-like image generating means for generating a grid-like image to be displayed by combining it with a video signal from a measurement object, and a grid-like image generated by the grid-like image generating means in a vertical direction and a horizontal direction, respectively. A grid division number setting unit that sets a grid width of the image data; a storage unit that stores image data generated by the grid image generation unit; a signal generation unit that converts data in the storage unit into a video signal; A signal synthesizing unit that outputs a video signal obtained by synthesizing the video signal from the object and the signal generated by the signal generating unit; and measuring a voltage value of an arbitrary position of the video signal from the measurement object to measure the signal. An image inspection apparatus comprising: a measuring unit that calculates an amplitude and a phase; and a position specifying unit that specifies a position of the measuring unit. 2. A grid-like image generating means for generating a grid-like image to be displayed by combining with a video signal from a measuring object, and a grid-like image generated by the grid-like image generating means in a vertical direction and a horizontal direction, respectively. A grid division number setting unit that sets a grid width of the image data; a storage unit that stores image data generated by the grid image generation unit; a signal generation unit that converts data in the storage unit into a video signal; A signal synthesizing unit that outputs a video signal obtained by synthesizing a video signal from an object and a signal generated by the signal generating unit; and a synthesized image display unit that displays a synthesized video signal output from the signal synthesizing unit. A measuring unit that measures a voltage value of an arbitrary position of a video signal from the measurement target and calculates an amplitude and a phase of the signal; and an amplitude of the measuring unit and a measurement result display unit that displays a phase measurement result. An image inspection apparatus comprising: a position designation unit for designating a position to the measurement unit. 3. Generating a marker image to be displayed at a position specified by the position specifying means, generating a marker image generating means to be stored in the storage means, and generating an image of a measurement result calculated by the measuring means. 3. The apparatus according to claim 1, further comprising: a measurement result image generation unit that stores the measurement result image in the storage unit.
The image inspection apparatus according to the above. 4. The apparatus according to claim 1, further comprising a waveform graph image generating means for generating an image of a graph of waveform data of an arbitrary scanning line number of the video signal fetched by said measuring means and storing it in said storage means. Image inspection equipment.