Patent ID: 8749843
Filing Date: 2014-06-10
Classification: G06K,G06T,H04N

Abstract:
1. A method of grouping image quality anomalies of an image, the method comprising: a) printing a test image onto a printable media according to an input characterization data set using a printing system; (b) measuring the test image to generate a characterization data set representing measurements of intensity or color values observed from the test image; (c) generating a density profile using the characterization data set, the density profile representing intensity or color value variation of the test image in a cross-process direction transverse to a process direction of the printing system; (d) operating a processor to determine a descriptor parameter set for a streak template that approximates the density profile using a basis selection algorithm, the descriptor parameter set including: (e) updating the density profile according to the streak template and the descriptor parameter set; (f) generating a printer streak characterization according to the streak template and the descriptor parameter sets; (g) based on the printer streak characterization, selecting a region of the image to be analyzed, the region defining an absolute cut-off distance within which a streak must be located to be a part of a grouping; (h) selecting a streak within the region against which all streaks will be compared; and (i) analyzing all remaining streaks within the region using a transitive closure operation, such that streaks that meet the following criteria for determining similarity can be grouped, the criteria consisting of: wherein the streaks are then grouped according to the following rule: