Tom Mann
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Yesterday, in the Freelance section, a fellow offered to pay a nominal sum to have someone make some precise masks for him on a large image (8200 x 5600 px) in a very limited amount of time. He specifically was interested in finding efficient alternate approaches to masking. No one took him up on his request, so he was forced to do it for himself.
It's inappropriate to offer technique help in that forum, so, since no one responded to his request, and his offer has now expired, I started this technique thread to show how a wonderful old plugin, Asiva Select is perfect for tasks like this. The Asiva plugin allows one to make very precise selections based simultaneously on hue, saturation and brightness, and does so very, very quickly.
Attached below are:
1. A tiny crop (~650 pixels square) at 1:1 magnification from the original;
2. A screen shot of the adjustments within Asiva Select that I used to select out the cyan areas.
3. An example of the application of the mask produced by Asiva Select -- I changed the hue of the cyan areas.
The total time to set up Asiva to make this selection was probably under 30 seconds! If I spent a bit more time refining the adjustments and feathering the mask, I'm sure that even the occasional very small (1 or 2 pixel wide) edges that aren't perfect could be improved even further.
I own and regularly use many different selection plugins, but I have never found one as capable as Asiva for tasks like this.
The only problem with my recommendation is that I believe the software company, Asiva, is out of business. Copies of the demo version of the program are easy to find on the web, but I'm not sure how one would unlock one of these without accessing the company's license server. So, if you ever find a copy with a valid serial number, snatch it up and guard it.
BTW, the program works on CS6, 16 bit per channel images, and very, very large images.
HTH,
Tom M
It's inappropriate to offer technique help in that forum, so, since no one responded to his request, and his offer has now expired, I started this technique thread to show how a wonderful old plugin, Asiva Select is perfect for tasks like this. The Asiva plugin allows one to make very precise selections based simultaneously on hue, saturation and brightness, and does so very, very quickly.
Attached below are:
1. A tiny crop (~650 pixels square) at 1:1 magnification from the original;
2. A screen shot of the adjustments within Asiva Select that I used to select out the cyan areas.
3. An example of the application of the mask produced by Asiva Select -- I changed the hue of the cyan areas.
The total time to set up Asiva to make this selection was probably under 30 seconds! If I spent a bit more time refining the adjustments and feathering the mask, I'm sure that even the occasional very small (1 or 2 pixel wide) edges that aren't perfect could be improved even further.
I own and regularly use many different selection plugins, but I have never found one as capable as Asiva for tasks like this.
The only problem with my recommendation is that I believe the software company, Asiva, is out of business. Copies of the demo version of the program are easy to find on the web, but I'm not sure how one would unlock one of these without accessing the company's license server. So, if you ever find a copy with a valid serial number, snatch it up and guard it.
BTW, the program works on CS6, 16 bit per channel images, and very, very large images.
HTH,
Tom M