1. A method to enable adjustment of estimates of subject and background colors used to compute the contribution of a background color to pixels in semitransparent and translucent subject areas, said method comprising the steps of: a) receiving visually identified semitransparent and translucent subject areas where a first estimated background color contribution, when subtracted from an image, does not fully remove the background, or removes all of the background and some of the subject, b) receiving a color selected from said subject or background based on a judgment by an operator as to whether at least one of: i) a poor estimate of the background color, and ii) a poor estimate of the subject color, is primarily responsible for generating an inaccurate matte in said identified semitransparent and translucent subject areas and storing said selected color in memory, c) injecting said stored selected color, based on an input from the operator, into at least one point in at least one of i) said judged subject, and ii) said judged background, which when interpolated/extrapolated, provides an improved estimate of the selected subject or background color contributing to the color in a transition pixel.