Patent ID: 9191592
Filing Date: 2015-11-17
Classification: H04N

Abstract:
1. A method for finding an anomalous pixel column produced by an imaging sensor, comprising: signaling the imaging sensor to capture a digital image of a dark scene, wherein the dark scene has no visible light and no infrared light that would produce a substantial response from the imaging sensor, wherein the digital image includes a plurality of pixel columns; for each of the plurality of pixel columns, computing a respective column value that represents some of the pixels in the pixel column; for each of the plurality of pixel columns, making a respective comparison between the respective column value of the pixel column and a reference value; computing a respective column score, for each of the plurality of pixel columns, based on the respective comparison; and storing an indication that identifies one of the plurality of pixel columns as anomalous when the respective column score of said one of the plurality of pixel columns does not meet a criterion that represents a detection threshold for column noise of less than one equivalent pixel electron.