Re: Webcams again

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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Relevant Pages

  • Re: Webcams again
    ... On Thursday 01 February 2007 12:56, Rick Sewill wrote: ... webcam to sort of work. ... He sent me an updated driver, he thought might be able to get an image. ... I would take a picture and send the picture to him. ...
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