functions in color.i - t

             hsv= to_hsv(rgb)  
          or hsv= to_hsv([r,g,b])  
 
     return the HSV representation of the n-by-3 array of RGB colors  
     rgb: red, green, blue from 0 to 255  
     hsv: h= hue in degrees, red=0, green=120, blue=240  
          s= saturation from 0 (gray) to 1 (full hue)  
          v= value from 0 (black) to 1 (full intensity)  
          s= 1 - min(r,g,b)/max(r,g,b)  
          v= max(r,g,b)  
interpreted function, defined at i/color.i   line 111  

             rgb= to_rgb(hsv)  
          or rgb= to_rgb([h,s,v])  
 
     return the RGB representation of the n-by-3 array of HSV colors  
     rgb: red, green, blue from 0 to 255  
     hsv: h= hue in degrees, red=0, green=120, blue=240  
          s= saturation from 0 (gray) to 1 (full hue)  
          v= value from 0 (black) to 1 (full intensity)  
          s= 1 - min(r,g,b)/max(r,g,b)  
          v= max(r,g,b)/255  
interpreted function, defined at i/color.i   line 68