void rgb_to_yc(LPDWORD image_rgb,double *y,double *c1,double *c2);
void yc_to_rgb(double *y,double *c1,double *c2,LPDWORD image_rgb);
void c_to_sh(double *c1,double *c2,double *sat,double *hue);
void sh_to_c(double *sat,double *hue,double *c1,double *c2);
int sat_image(double *sat,LPDWORD image_out);
void hue_image(double *sat,double *hue,double stdhue,LPDWORD image_out);
void y_image(double *y,LPDWORD image_out);
void tran_hsy(double *in_hue,double *in_sat,double *in_y,		//-180<=hd<=180 “x
			  double *out_hue,double *out_sat,double *out_y,	//-100<=sm<=100 %
			  int hd,int sm,int ym);							//-100<=ym<=100 %