絵画の明度分析

概要

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We have measured to analyze the lightness of 386 pictures in books of 12 famous painters by means of an image scanner. The measurement was performed on condition that pixel resolution is 100 dpi and lightness is 64 levels, or 150 dpi and 128 levels. The result was described graphs of pixel frequency for lightness. We could classify the lightness distribution to four types, type I to IV. The type I has a sharp peek in the dark side, type II has a or more tiny peeks in the bright side in the distribution of type I, in type III the bright side peek in the type II becomes to increase and in type IV the dark side peek disappears and the bright side peek only rests. We also calculated the average value of picture lightness and obtained 5.3 for the average value of all 386 pictures. Pictures of old painters as da Vinci, P Bruegel and Goya have type I and II and dark ones. These of modern painters have type III and IV as well as type I and II and bright ones.
1995-03-31