[MPlayer-users] Converting black and white images to pseudo colors

[Emmanuel Mayssat]

All,

http://en.wikipedia.org/wiki/False-color
According to wikipedia, this is called pseudo-color(ing)...
Any idea on how to implement this?
Regards,
--
E



On Mon, 2009-07-13 at 11:49 -0700, Emmanuel Mayssat wrote:
> Hello,
> 
> I am using mplayer with a rtsp stream (Axis server a243q)
> My cameras/video streams are black and white.
> 
> What I am interested in is the pixel intensity.
> (darker = lower intensity, whiter = high intensity)
> but the shading of grey are difficult to perceive on a display by
> operators. A technique we commonly use is color filtering or false
> colors.
> 
> Let me illustrate.
> I am interested in using the color gamut instead of a shading of grey.
> If I have 8 bits pixel depth, I want 
> Black  mapped to back
> Blue (shade of blue) mapped to bit depth range 10-45
> Green ...
> Yellow mapped to depth range 90-130
> Red.... range 225 to 255
> 
> I don't care so much about the range of the color shading.
> I just care about having false colors
> 
> 
> How can I do that?
> Do I have to write my own filter?
> If so any clues on how to do that? (sample program?)
> ... and of course have it work very be fast?
> 
> I went through the man page looked at "equation" (eq2) 
> Is this what I need? It is reported as being slow, but how slow?
> How do I build a lookup table?
> 
> 
> Regards,
> --
> Emmanuel Mayssat
> 
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