Extraction of Color Information and Visualization of Color Differences between Digital Images through Pixel-by-Pixel Color-Difference Mapping

A novel method of extracting color information on a pixel-by-pixel basis or by the average regions interest (ROIs) from digital images is proposed and demonstrated using newly developed customized image-processing/analysis software (PicMan). For quantitative statistical analyses color, can be used for archive forensic applications in various fields. The differences between unrelated, similar, identical scenes objects were quantified formats desired spaces such as RGB, HSV, XYZ, CIE L*a*b*, Munsell hexadecimal values. visualized mapping ?L*, ?a*, ?b*, ?ERGB, ?EHSV, ?E*L*a*b* values block comparison sizes. Various color-difference examples an aged damaged oil painting before after restoration introduced. effects image file format PNG JPG distortion are statistics mapping. portrait Chuk-ki Yoo (???, 1691–1767) silk 18th century Korea was further analysis whole selected areas. collector’s ownership stamp stamped red ink text areas one his book collections extracted image-processing superimposed original visualization enhancement example. Image analysis, processing, modification, enhancement, highlighting, well most formats, conveniently efficiently performed piece dedicated extraction technique very effective variety art cultural heritage objects.