Within color reproduction issues, the reproducible color gamut and color accuracy can be classified as pointwise problems without considering interaction among neighboring pixels. Image color contouring, on the other hand, occurs when perceived local color change exceeds a threshold
such that observers perceive unnatural color discontinuity. Therefore, it is the color correlation within neighboring pixels that determines the existence of color contouring artifacts. In this proposal, the objective is to adopt a color flatbed scanner as the measuring device to obtain color
as well as spatial information. A set of test targets with smooth geometrical color variation covering various cross sections in the color space is created and printed on different printing systems. Finally, an algorithm to identify the location color contouring is proposed.