Patent ID: 6907146

Claim:
A computer implemented method for detecting pixel stutter, wherein the pixel stutter is when two or more adjacent pixels with the same intensity value, of a scanner comprising: obtaining an image representing a plurality of pixels using said scanner; wherein said image has a plurality of rows and columns of pixels, wherein said scanner obtains said image row by row; obtaining a measurement of pixels stutter said image, wherein said measurement of pixel stutter is time correlated; wherein said measurement of pixel stutter is row stuttered pixel count; obtaining a statistical distribution of pixel stutter; wherein said statistical distribution of pixel stutter is a measurement of non-time correlated pixel stutter in said image; and wherein said statistical distribution is measured by column stuttered pixel count; and; determining whether said measurement is above what is expected from said statistical distribution; wherein said determining comprises comparing row stuttered pixel count and column stuttered pixel count; wherein said comparing comprises calculating a ratio of said row and column stuttered pixel counts.