CORRECTION METHOD AND DEVICE FOR HANDLING COLUMN FIXED PATTERN NOISE OF IMAGE SENSOR AND RELATED IMAGE SENSING DEVICE

Abstract: a correction device includes: an offset updating unit, a calculating unit and a gain stretching unit. the offset updating unit is configured to generate a plurality of updated offset values according to a plurality of base offset values, wherein each of the plurality of updated offset values corresponding to one column of pixel values among a plurality of columns of pixel values generated by an image sensor. the calculating unit is configured to generate a plurality of columns of corrected pixel values according to the plurality of updated offset values and the plurality of columns of pixel values. the gain stretching unit is coupled to the calculating unit and configured to determine a compensation gain according to the plurality of updated offset values and accordingly generate a plurality of columns of output pixel values according to the compensation gain and the plurality of columns of corrected pixel values.

Inventor(s): Wei-Chieh Yang, Po-Chang Chen, Felix Su

CPC Classification: H04N25/671 (for non-uniformity detection or correction)

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