Performance testing system and testing method for TOD (Triangle Orientation Discrimination threshold)

Abstract

The invention discloses a performance testing system and a testing method for a TOD (Triangle Orientation Discrimination threshold). The performance testing system comprises a main control computer, an image bit width converter and a display, wherein the main control computer comprises an image generating module and a TOD performance testing module; the image generating module is used for finishing parameter setting of a test image, generation of the image and preview of the image; the TOD performance testing module is used for finishing playing of the test image from the image generating module, recording a judgment result on the target direction of the test image, and transmitting the test image to the image bit width converter; and the image bit width converter is used for realizing bit width conversion of the test image. According to the performance testing system and the testing method, the bit width of the test image is increased from 8 bits to 10 bits or 12 bits by adopting the image bit width converter, and the minimum contrast is decreased from 1 / 256 to 1 / 1024, so that cost is reduced; and the color depth of the image is tested easily and conveniently by adopting the TOD, so that the minimum contract of the test image is decreased, and the testing correctness and the testing accuracy of the TOD are increased.

Description

technical field [0001] The invention relates to performance evaluation of a photoelectric imaging system, in particular to a TOD method performance test system and a test method. Background technique [0002] Triangle Orientation Discrimination threshold (TOD) method is a new method that can fully characterize the performance of photoelectric imaging system and is easy to use. This method uses equilateral triangles of different sizes and different contrasts as test splines , through the photoelectric imaging system, the observer repeatedly judges the triangle orientation, and obtains the relationship curve between the threshold contrast and the triangle size corresponding to the 75% correct judgment probability. It is considered as a new method applicable to the performance characterization of new optoelectronic imaging systems in the future. The image bit width used in the traditional test method is 8bit, which has the disadvantages of low test accuracy and insufficient de...

AI Technical Summary

Problems solved by technology

The image bit width used in the traditional test method is 8bit, which has the disadvantages of low test accuracy and insufficient test sample points

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