US 12,260,534 B2
Method to detect camera blemishes
Nidhin Davis, Glen Mills, PA (US); Timothy Hopfer, Downingtown, PA (US); and Mark Parsons, West Chester, PA (US)
Assigned to Communications Test Design, Inc.
Filed by Communications Test Design, Inc., West Chester, PA (US)
Filed on Apr. 26, 2022, as Appl. No. 17/660,768.
Prior Publication US 2023/0342897 A1, Oct. 26, 2023
Int. Cl. G06T 7/00 (2017.01); G06T 3/40 (2024.01)
CPC G06T 7/0002 (2013.01) [G06T 3/40 (2013.01); G06T 2207/20216 (2013.01); G06T 2207/20224 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A method of detecting a blemish in a digital camera, the method comprising:
Capturing a digital image of a white area by the digital camera;
Reducing resolution of the digital image by grouping pixels of the digital data into a matrix of a plurality of data block; and
Comparing a luminance value of each of the plurality of data blocks to an average luminance value of other data blocks of the plurality of data blocks within a predetermined region to determine if each of the plurality of data blocks is a potentially bad data block;
Wherein the luminance value of each of the plurality of data blocks equals (0.2126*R)+(0.7152*G)+(0.0772*B), where R, G, and B are the average red, green, and blue color values for digital image pixels within the data block.