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Re: filmscanners: VueScan 7.0.18 Available

In a message dated 5/7/2001 7:59:22 AM EST, dean.shough@lmco.com writes:

> I know that your algorithms are different from what ASF does with ROC and
>  ICE, but it looks like ASF does their ROC first, and then uses information
>  from ROC to improve GEM.  Part of the ROC algorithm identifies what portion
>  of each pixel belongs to each dye layer.  When the scan includes  IR, this
>  information can be used to help separate the RGBI layers.  Using this 
>  help isolate dust from actual image content.

This is basically the order VueScan does things - ICE -> ROC ->GEM.
The infrared dust removal gets done first, one pixel at a time without
doing any smoothing or filling of dust spots.  The restore colors is done
next and then the last step of filtering the neighborhood around dust
spots (or around film grain) is done.

Ed Hamrick


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