Patent ID: 6167152
Filing Date: 2000-12-26
Classification: G06T,H04N

Abstract:
A method for removing yellow microdots from a color image, the method comprising the steps of:(a) providing a color image having a plurality of microdots arranged in a predetermined array within image data;(b) comparing a blue code value at a location in the color image with an estimate of the blue code value for the location obtained from one or more surrounding locations, in order to determine whether the location may contain a microdot that requires correction;(c) comparing a second code value for a second color at the location in the color image with an estimate for the second code value at the location obtained from one or more surrounding locations, in order to verify that the location contains a microdot;(d) comparing a third code value for a third color at the location in the color image with an estimate of the third code value for the location obtained from one or more surrounding locations, in order to verify that the location contains a microdot; and(e) replacing the blue, second, and third code values at the location with the estimated code values only if the results of steps (b), (c) and (d) meet predetermined criteria, thereby removing the effect of a microdot at the location.