Camera glare test method and glare collection device thereof

Abstract

The invention discloses a camera dazzle light test method and a camera dazzle light acquisition device thereof. The method comprises steps of emitting parallel point light sources to the camera to take pictures and collect dazzle light images through a light source of the camera dazzle light collecting device and a parallel light pipe; obtaining image parameters in the picture Exif information, calculating a camera object-side brightness value (Bv); according to the dynamic range of the camera and the photoelectric conversion curve, obtaining a corresponding relation between the photo gray value and the camera brightness; setting a light source brightness ratio specification according to the influence degree of dazzle light on the picture; obtaining a gray scale range of each correspondinglevel in the photo; Dyeing of levels, obtaining a color saturation specification according to photo color space conversion; According to the invention, the dazzle light with high color saturation inthe photo is counted and layer-wise summarized into the dazzle light index to represent the dazzle light intensity of the camera, so that the dazzle light measurement result can be transversely compared, the test result is highly related to the actual experience of the user, and the test content covers all scenes which can be used by the user, thereby quickly solving the problem and improving thetest efficiency.

Description

technical field [0001] The invention belongs to camera image quality evaluation, and in particular relates to a method for testing camera glare and special glare collection equipment for realizing the camera glare test method. Background technique [0002] The cause of camera glare is that the components inside the lens reflect and scatter to form stray light, and the stray light is imaged on the image sensor, resulting in a decrease in the contrast of the image, whitening of the overall picture, colored glare and concentrated brightness spots will seriously disturb the picture. In general environments, it occurs frequently in scenes where there are light sources whose brightness is much higher than that of the subject being photographed, such as outdoor scenes with strong sunlight, car lights or bright light sources in a dark environment at night. [0003] Glare will change with the angle of incidence of strong light, and light sources outside the field of view of the lens...

AI Technical Summary

Problems solved by technology

This method is only tested at a specific angle, ignoring the light outside the field of view entering the camera, and this kind of glare can be slowed down or eliminated by the digital method of ISP to improve the contrast of the photo, and it cannot monitor and evaluate the user's shooting in the actual scene The obvious glare received is quite different from the actual perception of the user

[0004] The method of the above standard ISO18844 only tests the brightness of the glare, but in the actual scene, the off-white glare will reduce the contrast of the photo, and the colored glare will not only reduce the contrast, but also seriously disturb the picture. Light perception will be more pronounced

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