| 摘要 |
PURPOSE:To display the two-dimensional characteristics of the color components of an image in real time, by extracting the change of the desired color component of a video signal to output the same in the state superposed on the original signal. CONSTITUTION:The component signals R, G, B of the RGB signal inputted from a video signal input terminal 31 are inputted to M-bit gradation boundary line detection circuits 32R, 32G, 32B to be converted to M-bit gradation data. These converted gradation data detect the timings transferring to other gradations to output gradation boundary line detection signals 33R, 33G, 33B. The R-, G- and B-boundary line signals 37R, 37G, 37B of a logical operation circuit 36 are inputted to a video level converting circuit part 41 formed from video level converting circuits 41R, 41G, 41B and respectively added to the primary color signals R, G, B by the adder circuits 42R, 42G, 42B forming an adder circuit part 42 to be outputted from video signal output terminals 43.
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