| 摘要 |
An electronic endoscope system with a color-balance alteration system includes a video scope having a CCD image sensor for producing a frame of color image-pixel-signals composed of frames of red, green, and blue image-pixel-signals. In the color-balance alteration system, nine red signals are extracted from the frame of red image-pixel-signals, and the nine signals form a 3x3 matrix including a central signal, and the eight circumferential signals. All four sets of three signals are selected from the nine signals, and each set of three signals is composed of the central signal, and two neighbouring signals aligned with each other such that the central signal lies therebetween. When a signal level of the central signal is smaller than both signal levels of the two circumferential signals with respect to even one set of three signals, the signal level of signal is decreased.
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