| 摘要 |
PURPOSE:To reduce the size and weight over the entire part of the device by extracting only the image signals approximate to preset reference colors and converting the signals to the brightness signals weighted according to such a normal distribution as to maximize the brightness total of the reference colors, then outputting the signals. CONSTITUTION:The image signals of two colors are selected respectively according to color assignment information 13 and 14 in selection circuits 11 and 12. The multiplied outputs, by multipliers 17 and 18, of the output of an inverse number circuit 16, i.e., the inverse number of the brightness total output of an adder 15 and the signals selected by the selection circuits 11 and 12 impart the component ratios of the respectively selected colors. The output of the adder 15 is converted to the signal weighted according to the normal distribution to be maximized by the brightness of the reference colors in a brightness detecting circuit 23. The output of this brightness detecting circuit 23 is selected by a selection circuit 24 only when there are the signal outputs of comparator circuits 19 and 20. A '0' is selected by the selection circuit 24 and is outputted as a synthesized signal from the selection circuit 24 when there are no signal outputs of the comparator circuits 19 and 20. |
