In article <41342dd8@news.povray.org> , Warp <war### [at] tagpovrayorg>  wrote:

>  No, it's a property of the film (well, in this case the CCD of the
> digital camera, but it works the same way there).

Actually, with a CCD you get many problem in case of overexposure.  The CCD
elements have a charge limit.  And you get charge transfers to neighboring
pixels in the same line.

Even worse, all but the most expensive CCDs depend on a filter grid and the
camera later interpolating to get the final resolution image (the CCD
resolution quoted for digital cameras is always that of a monochrome
CCD!!!).  As color samples are distributed in a gird getting a good
approximation very close to the CCD resolution works, but it also adds a
slight blur, which later comes in very handy when having to use JPEG
compression, which is more effective with a certain level of blur.

> Sometimes when you
> have extreme overexposure at the border of a frame in a film, the
> brightness might even bleed partially to the adjacent frame.

Which is an effect of scattering inside the camera...

    Thorsten

____________________________________________________
Thorsten Froehlich, Duisburg, Germany
e-mail: tho### [at] trfde

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