Re: deep grey scanners

From: Dale Johnstone (
Date: Mon Apr 09 2001 - 12:40:40 MDT

Eugene wrote:
> A quick question.
> Medical and biological imaging uses greyscale images in excess of 12 bit
> dynamics. There's definite loss in information when you go convert to 8
> bit images, even though quality may be sufficient for some purposes:
> Assuming, I want to scan, say, electromicrographs with up to 16 bit/pixel,
> which choices do I have? Starting with scanning, and proceeding to
> processing. Which hardware/software would you recommend? It can be
> relatively high-end.

Not sure about the hardware, but for software LeadTools do a range of high quality medical imaging components:

They support high bit depths, and I notice one of them mentions scanning (TWAIN or ISIS). Well pricey though.

Failing that, have you thought about using a non-linear scale and/or a high-pass filter to remove just the (usually redundant) DC
components? You might get away with regular 8bpp tools without a loss of detail then.

Dale Johnstone.

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