JPS62173570A - Automatic tester for picture processor - Google Patents

Abstract

PURPOSE:To test automatically the function of a picture processor by forming a picture processing part having the same function as the picture processor to be tested and comparing the output signal of the picture processing part with that of the processor to be tested. CONSTITUTION:A picture processing part 10 has the same function as a picture processor 2 to be tested together with its satisfactory working confirmed. A test process sequencer 25 outputs the same picture processing request signal to both the processor 2 and the same picture processing is executed. Here the output signals of the processor 2 and the part 10 are compared with each other by a digital signal comparator 23 for decision of the defective or nondefective state of the processor 2.

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to an automatic test device for image processing devices, for example, Xl1
The present invention relates to an automatic test device that can automate the functional test of an image processing device that is one unit of a CT system.

[Technical background of the invention and its problems] Generally, an image display device such as a CT has a CPU that transfers image data, and performs image processing (window conversion) on the image data from the CPU 1, as shown in FIG.

An image processing device 2 that performs ROI processing, search processing, etc.) and a CR that displays images processed by this image processing device 2.
It is equipped with T3.

When performing a functional test on the image processing device 2 of such an image display device, conventionally, a person tests the keyboard and switches of the operation console of the image processing device.

They operated trackers, balls, etc., displayed test patterns, processed images, and visually checked the images displayed on the CRT 3 to check for abnormalities.

However, inspection by human operation and visual confirmation is inefficient, and it is not possible to objectively determine pass/fail.

[Objective of the Invention] The present invention has been made in view of the above circumstances, and aims to automate and unattend functional testing of image processing devices, thereby improving testing efficiency and reliability of pass/fail determination. The purpose is to provide an automatic test device that can perform

SUMMARY OF THE INVENTION 1 To achieve the above object, the present invention provides an automatic test device that is connected to an image processing device that displays and processes image data and tests the processing function of the image processing device, An image processing unit that has the same processing function as the image processing device and is confirmed to operate well, and image processing conditions as test items for this image processing unit and the image processing device. a condition setting section for setting the image processing conditions; a comparison section for inputting the image data processed by the image processing section of the image processing apparatus 1 according to the image processing conditions and outputting a comparison result of both data; The image processing apparatus is characterized in that it includes a determination section that determines whether the processing function of the image processing apparatus is good or bad.

[Embodiments of the Invention] Examples of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a state in which the automatic testing device A of the present invention is connected to an image display device, and the image display device is a CPU (for example, a host computer of a CT device) like the device shown in FIG. 1, image processing device 2, and CRT 3
It is equipped with 4 is a D/A converter (DAC) that converts the digital signal from the image processing device 2 into an analog signal.
), and 5 is a magnetic disk on which test image data is recorded.

Automatic test equipment A is used to test actual products on the production line for the above image display devices, and has connections for supplying and extracting input/output signals so that it can be connected to the products in the process without modifying them. The image display device (product) is connected to the image display device (product) as shown in the figure.

That is, 10 is an image processing unit which has the same function as the image processing device 2 of the image display device and whose operation is confirmed to be good in advance, and the image processing unit 10 performs the image processing of the image display device from the CPU 1. The same image data as the image data sent to the device 2 is transferred from the CPU 1 to the BL/Is switch 1.
1 and performs the same image processing (window conversion, R
(OI processing, search processing, etc.). The image processed by this image processing section 10 is
4 can be displayed on the CRT 13 via the DAC 12. Furthermore, the specific configurations of the image processing device 2 of the image display device and the image processing section 10 of the automatic testing device A are shown in FIG.

In the figure, 14 is an image display section, 15 is a character generation section, 1
6 is an input/output control unit for ROI setting, etc.

17 is an image processing related control section for window conversion, search processing, etc., and 18 is an interface section that connects each of these sections with the CPU 1. In the actual product, the image processing device 2 of the image display device has a full keyboard 19.
Track ball 20° console panel 21. Input means such as a function keyboard 22 and the like are connected, but at the testing stage, a test process execution sequencer 25 to be described later to the automatic test equipment is connected instead of these input means. . Similarly, the image processing section 10 of the automatic testing apparatus A is also connected to the test process execution sequencer 25.

23 is a comparator connected to the image of the image display device, the image processing device 2, and the image processing section 10 of the automatic test equipment A, and the output signal from the image processing device 2 and the image processing section 10 is
The digital signal @) is input and compared, and the result is output as a comparison result signal. 24 is a basic display clock generator used for the image processing device 2 and the image processing section 10, and the image data signal input to the comparator 23 has the same phase in both the image processing devices 2 and 10, and is synchronized. The basic display clock is generated and supplied from one place so that it can be used for many different purposes.

Reference numeral 25 includes a determination unit that determines the quality of the image processing device 2 of the image display device based on the comparison result signal from the comparator 23, and a sequence program that controls each of the devices and performs various image processing tests. This is a test process execution sequencer having a stored condition setting section. That is,
Based on the sequence program, this test process execution sequencer 25 first outputs an initialization request signal to the CPU 1, and prepares the CPU for image data transfer and image processing to the image processing device 2 and image processing section 10.
1 (it is the software of CPU 1 that actually controls image data transfer and image processing). Next, a BUS switching signal is output to the BtJS switching device 11 to cause both image processing devices 2 and 10 to transfer the same image data. Next, the same image processing request signal is output to the image processing device 2 and the image processing section 10 to cause them to perform the same image processing. Then, the image-processed digital signals @ final part (signals immediately before DACs 4 and 12) are compared in the comparator 23, and whether or not the results are the same is sent to the test process execution sequencer 25 as a comparison result signal. Sent. Here, it has been confirmed in advance that the image processing apparatus 10 in automatic test A operates well. Therefore, in view of the principle that if the operation of the image processing device 2 on the image display device side which is the device under test is good, the comparison results of the output signals of both the image processing devices 2 and 10 will always be the same, If the results are the same, it can be determined that the image processing device 2 of the image display device under test is a good product, and if the comparison results are different, it can be determined that it is a defective product.

In this way, according to this automatic testing device A, it is possible to automatically determine whether the image processing device 2 is good or bad, and the final performance confirmation test process in the manufacturing process of the image processing device can be automated. , it is possible to achieve unmanned operation.

Although one embodiment of the present invention has been described above, it goes without saying that the present invention is not limited to the above embodiment, and can be modified as appropriate within the scope of the gist of the present invention.

For example, in the above embodiment, the CRTI 3 was provided so that the image processing unit 10 could also be visually checked;
RTI3 does not necessarily need to be provided.

[Effects of the Invention] As detailed above, according to the present invention, an image processing section that has the same functions as the image processing device that is the device under test and whose operation is confirmed to be good is provided. By comparing and determining the output signal of the image processing unit and the output signal of the device under test, it is possible to automate and unattend the functional test of the image processing device and improve the test efficiency.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a block diagram showing the usage state of an example of the automatic testing device of the present invention, Fig. 2 is a block diagram mainly showing an example of an image processing device, and Fig. 3 is a block diagram showing a general image processing device. FIG. 1 is a block diagram illustrating a display device and a conventional test method. 1...CPU, 2...Image processing device, 3...CR
T, 23... Comparison section, 25... Condition setting section 1 judgment section.

Claims (1)

[Claims] Connected to an image processing device that displays and processes image data,
An automatic test device for testing the processing function of this image processing device, which includes an image processing section that has the same processing function as the image processing device and whose operation is confirmed to be good; a condition setting unit for setting image processing conditions as test items for the image processing unit and the image processing device; and inputting image data processed by the image processing device and the image processing unit according to the image processing conditions, respectively; An automatic test device for an image processing device, comprising: a comparison section that outputs a comparison result of both data; and a judgment section that decides whether the processing function of the image processing device is good or bad based on the comparison result.