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Re: filmscanners: Vuescan long pass mode

charge bleeding is a characteristic of CCD sensors, once the electron wells get
filled up you get these vertical smears as the charge "bleeds" into adjacent
pixels..its a hardware problem, can only be solved by limiting the exposure.
I suggest you do multipass with the Canon instead of a "long pass exposure" if
you want to capture shadow detail in slides.

"bjs" <bjs1@home.com>  wrote:

>I agree, although Vuescan long pass currently seems to make some very simple
>assumptions about the CCD charge bleeding characteristics.   At the very
>least it would be nice not to have Vuescan include charge bled pixels in its
>output as it currently does.  The examples I posted earlier provide enough
>information for a more sophisticated approach.  Whether it's worth it or not
>I dunno.

Astropics http://home.att.net/~hermperez


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