Method for detecting optical defects within windshield
AssigneeSaint-Gobain Sekurit France
InventorThéo Rybarczyk
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Abstract
A method for detecting optical defects within a windshield. The method takes, as input, a digital image map of the intensity of optical power of a windshield, and provides, as output, a digital image map of optical defects. The method includes (a) an image processing of the digital image map of optical powers for detecting and delimiting regions that differs in intensity of optical power; (b) computing, for each detected regions, a representative geometric distance and a representative value of the optical power; (c) computing an image map of the detected regions for which the product between the representative geometric distance and the representative value of the optical power is equal or superior to 2.9·10−4.
Claims16
A computer implemented method for detecting optical defects within a windshield, wherein said method takes, as input, a digital image map of an intensity of optical power of a windshield, and provides, as output, a digital image map of optical defects, wherein said method comprises the following steps:
- (a) performing an image processing of said digital image map of optical powers for detecting and delimiting regions that differ in intensity of optical power;
- (b) computing, for each of the detected regions, a representative geometric dimension and a representative value of the optical power;
- (c) computing a digital image map of the detected regions for which the product between the representative geometric dimension and the representative value of the optical power falls within a range, the range including values equal or superior to 2.9·10−4, and
- (d) based on the digital image map of detected regions from step (c), automatically identifying the windshield as defective.
A computer implemented method for detecting optical defects within a windshield, wherein said method takes, as input, a digital image map of an intensity of optical power of a windshield, and provides, as output, a digital image map of optical defects, wherein said method comprises the following steps:
- (a) performing an image processing of said digital image map of optical powers for detecting and delimiting regions that differ in intensity of optical power;
- (b) computing, for each detected regions which are such that their apparent size in the scale of visual decimal acuity falls within a first range between 0.5 and 3, a representative geometric dimension and a representative value of the optical power;
- (c) computing a digital image map of the detected regions for which the product between the representative geometric dimension and the representative value of the optical power falls within a second range, the second range including values equal or superior to 2.9·10−4, and
- (d) based on the digital image map of detected regions from step (c), automatically identifying the windshield as defective.
A process for detecting optical defects within a windshield, the process comprising:
- (a) acquiring a digital image map of an intensity of optical power of a windshield;
- (b) processing, with a computing system, said digital image map for detecting and delimiting regions that differ in intensity of optical power;
- (c) computing, with the computing system, a digital image map of the detected regions for which the product between a representative geometric dimension and a representative value of the optical power falls within a range, the range including values equal or superior to 2.9·10−4, and
- (d) based on the digital image map of detected regions from step (c), automatically identifying the windshield as defective.
Dependencies are inferred from the claim text.