Re: $75 vision system

Gordon McComb wrote:
Daniel, Didn't want your post to go without a *thank you* for providing
some really great links.

No problem.

While on the subject, have you found the color correction in the
Logitech's a problem if you do color blob analysis? Are you able to get
into the raw format of the camera (like the program here does for still
cameras: http://www.pl32.com/pages/digicam.php), or do you just pick up
the corrected image as sent to the PC through the driver?

I'm just using the built-in color correction. To stabilize things, there is a setting to disable auto color adaptation and enter fixed settings. It also helps if you convert the image to HSL or HSV (http://en.wikipedia.org/wiki/HSV_color_space) before thresholding. These color spaces are better for specifying object colors than using RGB directly.

On Linux, you might be able to use/modify the Philips WebCam (pwc) driver to obtain pixels in the native camera format; but this is of little interest to me.

Later,
Daniel
.

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