[projectaon] Re: Voyage of the Moonsone Illustrations
- From: Jonathan Blake <jonathan.blake@xxxxxxxxxxxxxx>
- To: projectaon@xxxxxxxxxxxxx
- Date: Mon, 18 May 2009 12:20:09 -0700
On Mon, May 18, 2009 at 11:38 AM, Ingo Kloecker
<projectaon@xxxxxxxxxxxxxxxx> wrote:
> On Monday 18 May 2009, Jonathan Blake wrote:
>> P.S. For the sake of the curious, here's an outline of what I do to
>> clean the scanned images:
>>
>> 1) Drop the color depth to black and white (adjusting the threshold
>> to reduce noise and preserve image information).
>> 2) Crop the scan closely around the edges of the illustration, but
>> not exactly.
>> 3) Measure how far out of vertical the illustration is
>> using the illustration borders when available.
>> 4) Rotate to compensate.
>> 5) Increase color depth to 8-bit grayscale.
>
> It's interesting that you rotate the image in black and white. I would
> have thought that doing all manipulations in grayscale would give a
> better end result. Apparently, that's not true when it comes to
> rotation.
It's a good question. At 600 dpi which I've been working with, it
doesn't seem to matter much in the end. In fact, it may result in
cleaner images at the end because rotation can tend to smear out the
picture at the outside edges of rotation.
The only reason that I go to grayscale at that point is that PaintShop
Pro 6 won't skew an image in black and white. I would prefer black and
white because the skew definitely smears out the image. (I'm still
using PSP 6 because I everything else I've used - e.g. GIMP - makes it
more difficult to perform these tasks.)
Using 200dpi scans, I'll probably go to grayscale before rotation. We'll see.
--
Jon
~~~~~~
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