Re: [pwc] Image whiteout following the night -> day transition

["Lonni J Friedman" <>]

If its any consolation I am/was also seeing this problem.  The only
workaround that I ever found was to completely unload the pwc module,
and then reload it again.

On 9/28/06,  <> wrote:
> Hi.
>
> I'm using philips webcams in night/daylight environment and they sometimes
> exhibit 'whiteout' following the night -> day transition.
>
> This appears to occur when the light level _gradually_ increases from dawn
> onwards but the webcam does not automatically adjust to compensate for the
> increase in light level.
>
> I've used the following cameras with the results as indicated:
>
> Philips PCVC675K (Vesta)           NO PROBLEM
> Philips PCVC680K (Vesta Pro)       NO PROBLEM
> Philips PCVC840K (ToUcam Pro II)   WHITEOUT
> Philips SPC900NC                   WHITEOUT
>
>
> I'm currently using the following combinations
>
> ( motion 3.2.2, pwc 10.0.8, linux 2.6.13-1.1532_FC4 + PCVC675K & SPC900NC )
> ( motion 3.2.3, pwc 10.0.11, linux 2.6.14-1.1644_FC4 + PCVC840K )
>
> The frame rate is set to 10fps
>
> If I stop Motion and restart, the webcam adjusts back to the daylight level.
>
> How can I trigger the webcams to adjust to the light level without
> stopping and restarting motion every time.?
>
> Is there a way to get PWC to trigger this adjustment automatically?
>
> kind regards
>
>
> Chris


--
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L. Friedman                                    
LlamaLand                       http://netllama.linux-sxs.org
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