Color space

[fberreth]

Hello,

I have a new capture card and the first thing I did was to calibrate it to have a captured video digitize to the complete color space. So for instance, it produces "values" for Luminance between 0-255.
When I view the histogram of the frames with avisynth I noticed that there are brown areas of apparently "invalid" color values (0-16 and 235-255). Why is that? Do I really have to be between 16-235 to encode in XviD or does it only matter for TV playback or ... :confused:
I'm confused why someone would restict the color range which results in less quality.

[sh0dan]

If all luma values above 235 are displayed as white, there isn't much point in having the additional information.

Try using greyscale, to avoid color confusion, and you will see that all values >235 are displayed as white - same for black. On all my systems luma 235 is white.

You might only achieve overbrightning the material.

[fberreth]

Are you saying that Luminance of 235 converted to RGB is 255 (bright something)? So 16-235 YUY/YV12 luminance -> 0-255 RGB?