Webcams again

[Anne Wilson]

On Thursday 01 February 2007 12:56, Rick Sewill wrote:
> On Thu, 2007-02-01 at 11:06 +0000, Anne Wilson wrote:
> > In the thread "webcam support/hardware compatibility list" Riick Sewell
> > wrote
> >
> > The person at http://mxhaard.free.fr/ was very helpful in getting the
> > webcam to sort of work.  Unfortunately, my knowledge of webcams and
> > color was so limited I could only help him to a point, and he had to
> > wait for more knowledgeable people to get this webcam to get the colors
> > even close to being correct.
> >
> > Rick, can you give us some idea of what you had to do?  It may give us a
> > clue for troubleshooting our own colour problems.
>
> I wish I could give a good answer to this question.
>
> The person at http://mxhaard.free.fr had a way to dump registers, from
> the webcam.  I sent him a message, with these registers.  We were lucky
> when he made a guess the webcam chip set was similar to a chip set the
> driver supported.
>
> He sent me an updated driver, he thought might be able to get an image.
>
> I compiled the driver, from him, and ran a tool, he had on his website,
> that showed what was being seen from the webcam.  The tool could take a
> picture.
>
> I would take a picture and send the picture to him.  He would look at
> the picture and tell me what lines to change in the driver.  I would
> change those lines, take another picture, and send him the picture.
>
> We would repeat the process as far as we were able.
>
> He was able to get a picture.  The colors in the picture were poor.
>
> What he needed was a person who understood more about cameras and
> lighting and color--all things I did not know.
>
> I was a pair of hands.  I got lost when he tried to explain the
> different color things--YUV, parameters to try for red, green, blue,
> gamma.  I am not a camera buff.  He was very patient with me.

He sounds a great guy.  I'm using the atrpms version of gspcav1 driver, so I 
can't bother him with this.  OTOH, I'm not so sure now that it is a driver 
issue, as I find that ekiga gives me much better colour than aMSN.  
Reasonably accurate, certainly acceptable.  What *may* be a driver issue, 
though, is that the parameters I should be able to set in ekiga, kopete and 
aMSN don't move at all.

Anne
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