[Elphel-support] camera response curve

[Oleg]

Andreas,


> Do you have any idea why the response of the r g b pixel values is not
> linear with exposure time?

 Do you get something like on the 1st graph in this
article<http://harvestimaging.com/blog/?p=693>?
Also the electrical nature of the process allows to assume that the
function should be close to PixelValue ~ Charge = A*( 1-exp^(-B*Time) )

Best regards,
Oleg

On 16 November 2011 09:49, Andreas Bean <office at beanbox.com> wrote:

> Andrey,
>
> After investigating the problem more deeply I found out that the reason
> for my problem with the hsv saturation is a nonlinear camera response
> against the exposure time.
>
> Is there any processing done in the camera before saving in jp46 mode?
>
> Do you have any idea why the response of the r g b pixel values is not
> linear with exposure time?
>
> Andreas
>
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