Patent ID: 6424374
Filing Date: 2002-07-23
Classification: H04N

Abstract:
A hue adjusting method for adjusting the hue of a color image signal indicated by three primary color signals, said hue adjusting method comprising the steps of:inputting a central matrix coefficient deciding a central matrix X and representing the center of the variable range of a matrix coefficients; storing said central matrix coefficient; inputting a first matrix coefficient deciding a first matrix A and representing one end of the variable range of the matrix coefficients; storing said first matrix coefficient; inputting a parameter â€œaâ€  for adjusting said central matrix coefficient, and parameter being input in a continuously variable manner such that the value of the parameter may be continuously varied over a predetermined range; storing said parameter â€œaâ€ ; calculating a matrix Xâ€² according to the equation Xâ€²={aÂ·A+(1âˆ’a)B}/2 when the second matrix B is determined according tot he equation B=2Â·Xâˆ’A; and converting the hue of a color image signal indicated by said three primary color signals by performing a matrix multiplication of Xâ€² and a vector representing values of said three primary color signals.