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HOLOGRAPHIC IMAGING SYSTEM AND HOLOGRAPHIC IMAGING ANALYSIS METHOD WITH DETECTION OF FAULTS IN THE OBSERVATION CHAMBER
HOLOGRAPHIC IMAGING SYSTEM AND HOLOGRAPHIC IMAGING ANALYSIS METHOD WITH DETECTION OF FAULTS IN THE OBSERVATION CHAMBER
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机译:探测室故障检测的全息成像系统及全息成像分析方法
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摘要
The invention relates to a method for analyzing a medium by holographic imaging and to a corresponding imaging system, in which an image (101) of a sample of medium present in an observation chamber illuminated by a light source is acquired by a photosensitive sensor, the method being characterized in that it further comprises, after each acquisition, a defect detection phase using the gray levels of the acquired image, this defect detection phase comprising: a partition the acquired image (101) in a predetermined number N of thumbnails (32, 33); evaluating for each vignette and for the entire image a statistical parameter characterizing the distribution of the gray levels in the vignette and in the entire image, respectively; the calculation of an alarm factor from the statistical parameters previously evaluated; the comparison of the alarm factor obtained with a predetermined alarm threshold and the classification of the acquired image into a defective or valid image according to the result of the previous comparison.
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