Webcams again
Keith Powell
keith at keithg4jvx.force9.co.uk
Thu Feb 1 13:33:34 UTC 2007
On Thursday 01 February 2007 12:56 pm, 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.
Rick.
Thank you for your reply.
Anne is using the ATrpms version of the driver, whereas I am using the
MXHaard driver. I tried the ATrpms driver, but found no difference.
I too am getting poor colours and very variable picture definition,
depending on the program. Like Anne, I find that the video controls
in the different programs either do not work at all, or make enormous
changes to the picture as soon as I touch them. So I don't know if it
is the driver (strange that two different drivers should give similar
results) or the programs.
I hate to say this but, in XP, my Logitech web cam, using the Logitech
driver, gives an excellent picture.
Perhaps either a contact with Michael XHaard, or with Logitech is
called for.
Cheers
Keith
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