Method for reducing row and column noise in imaging systems

摘要

A method for the reduction of noise in an image including identifying neighboring pixel values in pixels proximate to a subject pixel; comparing the neighboring pixel values to a preset tolerance range; using neighboring pixel values within the tolerance range to calculate a pixel intensity correction value; and applying the pixel intensity value to the subject pixel.

主权项

1. A method for the reduction of row noise, said method comprising:
Filtering columns of pixels through a low pass filter; Computing row offset from average row differences of rows for which a count of valid filter updates exceed a preset threshold; Updating the image with said row offset; wherein said valid update is an update of said low pass filter where said difference between a first column filter value and a first column intensity is less than a tolerance value; and said tolerance value is determined by an image histogram and said tolerance is set to the width of a peak of said histogram at preset a ratio of a height of said histogram.