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Roy Harrington
[EMAIL PROTECTED]
Black White Photo Gallery
http://www.harrington.com
levels of gray (i.e. less bit depth) is easily compensated for by
a higher
resolution --- that's the basic principle of halftoning or of
stochastic dithering in
printing.
Roy
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Roy Harrington
[EMAIL PROTECTED]
Black White Photo Gallery
http://www.harrington.com
On Monday, September 22, 2003, at 06:09 PM, Brad Davis wrote:
On 22/9/03 16:44, Roy Harrington [EMAIL PROTECTED] wrote:
Brad,
You are probably right that -- This conversation is only about bit
depth.
But I think that is one of the main shortcomings of the discussion.
Resolution
size brush you like (big is best I think). Also use a low Opacity like
10% to 20%.
Paint over the image. If you do a lot it may be necessary to move up
the
History state.
This method is really nice because it avoids clipping the
shadows/highlights.
Roy
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Roy Harrington
[EMAIL PROTECTED]
Black
On Sunday, September 21, 2003, at 01:59 PM, Paul D. DeRocco wrote:
From: Roy Harrington
A much better way to do burning/dodging that works in both 8 and 16
bit
files
is to use the History Brush. Simply select the History Brush, click
on
the
current state in the History palette. Now
. With multiple
passes you average several samples getting a more accurate measurement.
You are increasing your resolution beyond the random noise level; when
you get down to the quantization level its a hard limit on resolution.
That's the best you can do.
Austin
Roy
Roy Harrington
[EMAIL
like to know why and how you
look at it.
Thanks,
Roy
Roy Harrington
[EMAIL PROTECTED]
Black White Photography Gallery
http://www.harrington.com
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this file, its a TIFF to insure there is no lossy compression.
http://www.harrington.com/21step-noise.tif
Austin, I hope you are willing to print this out with Piezo and
measure some of the steps.
Roy
Roy Harrington
[EMAIL PROTECTED]
Black White Photography Gallery
http://www.harrington.com
in decibels (dB).
Roy Harrington
[EMAIL PROTECTED]
Black White Photography Gallery
http://www.harrington.com
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of resolution. What is the resolution? At
the very dense end the resolution is a whole stop i.e. 0.30D units.
At the other end it's close to .3/2048 or 0.00015D units.
So, again, I can't feel the concept of resolution is very
meaningful -- its just too varied.
Roy
Regards,
Austin
Roy
the minutiae instead of
understand the overall concept, no wonder people are confused.
Well, there's a difference of opinion about who's mistaken.
So much for your promise to not post any more on this...
Austin
Roy Harrington
[EMAIL PROTECTED]
Black White Photography Gallery
http
situation, not a definition for the general case.
I hope you can spend some considering what I have written, I've spent
a fair amount of time figuring out how to explain my case.
Regards,
Roy
Roy Harrington
[EMAIL PROTECTED]
Black White Photography Gallery
http://www.harrington.com
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