Re: Similarity between integers in a list
Re: Similarity between integers in a list
- Subject: Re: Similarity between integers in a list
- From: Martin Orpen <email@hidden>
- Date: Wed, 19 May 2004 12:26:22 +0100
[originally sent to the OP instead of the list by mistake]
on 19/5/04 2:54 am, Christopher Nebel at email@hidden wrote:
>
It's not really clear what you mean by "colourful". Do you mean that
>
there are a lot of different colors? That the colors are all well away
>
from 50% gray? That there are a lot of high-saturation-high-brightness
>
(for lack of a better word, "colourful") colors? For instance, a
>
black-to-white wipe would qualify as "colourful" under the first and
>
second definitions, but not the third. A pure red image would qualify
>
under the second and third definitions, but not the first. A pure
>
black image would qualify under the first definition, but not the
>
second or third. You see the problem?
Yes, bad explanation after a long day :-(
The main part of the script is separating images from RGB to CMYK. Images
that are neutral (or very close to it) need to be separated using a
different ICC profile to than regular colour images (wider and longer black
values if you're interested).
So I need to detect RGB values that are equal or very close to equal in all
of the random samples.
>
Also, you've currently got everything expressed as RGB, but distance in
>
RGB space isn't good at determining all color qualities. L*a*b* would
>
make more sense for the first two definitions; HSB would make more
>
sense for the third. (I'd be surprised if Photoshop couldn't do the
>
conversion for you.)
I don't know if PS CS is different to PS 7, but getting a pixel value in RGB
is a PITA. You have to get a histogram for each channel and then loop
through the results up to 256 times asking if the value of the pixel is "1"
:(
This can take up to 6 seconds, but it doesn't bother me that much as every
image is over 100Mb and will take much longer to open, separate, sharpen,
save etc.
Regards
--
Martin Orpen
Idea Digital Imaging Ltd -- The Image Specialists
http://www.idea-digital.com
_______________________________________________
applescript-users mailing list | email@hidden
Help/Unsubscribe/Archives:
http://www.lists.apple.com/mailman/listinfo/applescript-users
Do not post admin requests to the list. They will be ignored.