documentation/colour.html

   1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
   2 <html>
   3 <body>
   4
   5 <h1>Colour Matrix</h1>
   6
   7 Imageviewer provides two different colour matrices that can be used to perform conversion
   8 between YCbCr and RGB. These two matrices cover all common SDTV and HDTV applications.
   9
  10 <h2>SDTV Matrix</h2>
  11 <code>
  12 ITU-R BT 601<br>
  13 ITU-R BT 470, PAL system B/G<br>
  14 SMPTE 170M, NTSC<br>
  15 SMPTE 293M, 720x483 59.94P<br>
  16 <br>
  17 Ey  =  0.299Er + 0.587Eg + 0.114Eb
  18 </code>
  19
  20 <h2>HDTV Matrix</h2>
  21 <code>
  22 ITU-R BT 709 (1125/60/2:1 only)<br>
  23 ITU-R BT 1361 Worldwide Unified HDTV<br>
  24 SMPTE 274M 1920x1080 HDTV<br>
  25 SMPTE 296M 1280x720 HDTV<br>
  26 <br>
  27 Ey  =  0.2126Er + 0.7152Eg + 0.0722Eb<br>
  28 </code>
  29
  30 <p>The colour matrix can be chosen from the "View" menu.</p>
  31
  32 </body>
  33 </html>