Target color contrast testing device and method

Abstract

The invention provides a target color contrast testing device and method. The device is formed by an optical imaging system, an RGB filtering system, an area array CCD acquisition system, a computer measurement and processing system and an optical platform. The optical imaging system is aligned to a target and a background, optical signals emitted by the target and the background or optical signals only emitted by the background pass through the optical imaging system and are then subjected to light distribution through the RGB filtering system and finally imaged on the area array CCD acquisition system, and output signals of the area array CCD acquisition system are fed into the computer measurement and processing system. A CIE1964-UCS standard chromaticity theoretical evaluation system is adopted, and comprehensive calculation of three attributes, such as the brightness index W* and chromaticity indexes U* and V*, of colors is achieved; meanwhile, influences of brightness and chromaticity of the target are considered, objective evaluation target color contrasts are comprehensively evaluated, and visible light stealthy target color contrast measurement is achieved.

Description

technical field [0001] The invention belongs to the field of optical measurement and testing, and mainly relates to a test method for target contrast, in particular to a test method for target color contrast. Background technique [0002] The target color contrast is a fusion of brightness and chroma. Different brightness and different chroma will have different contrast of the target. Therefore, the influence of both brightness and chroma should be considered when studying the color contrast of the target. Brightness contrast describes the ratio of the target brightness to the ambient background brightness, which mainly reflects the brightness between the target and the background, but the brightness contrast cannot fully describe the color characteristics of the target and the background, and the chromaticity contrast is mainly tested by the spectral power method at this stage However, this method does not consider the visual function V(λ) of the human eye when calculating...

AI Technical Summary

Problems solved by technology

Brightness contrast describes the ratio of the target brightness to the ambient background brightness, which mainly reflects the brightness between the target and the background, but the brightness contrast cannot fully describe the color characteristics of the target and the background, and the chromaticity contrast is mainly tested by the spectral power method at this stage , but this method does not consider the visual function V(λ) of the human eye when calculating the spectral power integral, and its test results do not conform to the chromaticity theory

[0003] At present, there is no relevant report on the measurement method of the color contrast of the object that can accurately and comprehensively evaluate the target according to the photometric and chromaticity theory.

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