Patent ID: 7508994

Claim:
A method for detecting noise in an image, the method comprising using a processor to perform the steps of: (a) applying a frequency transform to the image for obtaining a magnitude image in a frequency domain; (b) comparing a threshold value to values of the magnitude image for obtaining first thresholded values; (c) applying a regression to one or more thresholded values for obtaining an estimated best fit line; (d) determining a correlation factor from the estimated best fit line; (e) if the correlation factor does not meet a predetermined value, applying a second threshold to the first thresholded values to obtain second thresholded values which are a subset of the first thresholded values and repeating steps (c) and (d); and (f) if the correlation factor meets the predetermined value, calculating a streak angle where the streak angle is perpendicular to an angle of the best fit line.