COLOR CORRECTING CIRCUIT OF TELEVISION CAMERA
PROBLEM TO BE SOLVED: To increase a correction amount and to facilitate adjustment by recognizing hue when color difference signals R-G is positive and B-G is negative, i.e., colors between red and yellow as a skin color and operating and synthesizing a correction coefficient to the color difference...
Gespeichert in:
1. Verfasser: | |
---|---|
Format: | Patent |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext bestellen |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | PROBLEM TO BE SOLVED: To increase a correction amount and to facilitate adjustment by recognizing hue when color difference signals R-G is positive and B-G is negative, i.e., colors between red and yellow as a skin color and operating and synthesizing a correction coefficient to the color difference signal R-G in this area with a correction coefficient to the B-G. SOLUTION: In the case of a neutral color between red and yellow, i.e., a skin color, color signals R-G and G-B are positive, and B-R is a negative value in the area where a signal ratio of R, G and B is R>G>B, and switches 19, 20 and 27 are switched to upper sides and switches 21, 25 and 26 are switched to lower sides. When the coefficient values of coefficient registers 34 and 35 are KS1 and KS2 respectively in such a state, an operation result of an arithmetic circuit 36 is multiplied by a coefficient K1 of a coefficient register 13, and further, the coefficient is multiplied by a signal B. Only about these neutral colors, i.e., colors which are in the range of R>G>B, hue and saturation are changed without changing hue and saturation in the case of red and yellow by changing the coefficients KS1 and KS2 of the registers 34 and 35 through the arithmetic operation. |
---|