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Re: Separating image band alters histogram
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From: |
Terry Duell |
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Subject: |
Re: Separating image band alters histogram |
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Date: |
Sun, 30 Sep 2012 08:58:20 +1000 |
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User-agent: |
Opera Mail/11.64 (Linux) |
On Sat, 29 Sep 2012 17:38:44 +1000, Tim Bate <address@hidden> wrote:
You have a couple of problems there. First, and least, I wouldn't be
using
jpeg. It's lossy. Secondly, the brightness of an image is a combination
of
R, G and B. But it is weighted. For example, more than half of the
brightness comes from the Green.
If you separate the bands, and take them as greyscale, and save them,
things get really confusing. Can you just save the bands as matrices?
No, I need the bands as images.
If you really need to save as images, try png.
OK.
Thanks for your help.
Cheers,
--
Regards,
Terry Duell