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Technical background info PSCS3
doemoezi
Registered Users Posts: 13 Big grins
When we read magazines, books or internetsites, a lot of 'how to' is to be found.
What I am missing - and looking for - is the technical background.:dunno
An Example:
You can use a gradient map to enhance your B&W photo's. But how does it works? What does it - technically spoken - do?
If one knows the way it works under the hood, you can apply the best technique for the choosen photo. Without that it is often trial and error.
My question is not only for 'gradient map' but for all the tools and 'bells' of PSCS3
Are there any weblinks with that info, books?
What I am missing - and looking for - is the technical background.:dunno
An Example:
You can use a gradient map to enhance your B&W photo's. But how does it works? What does it - technically spoken - do?
If one knows the way it works under the hood, you can apply the best technique for the choosen photo. Without that it is often trial and error.
My question is not only for 'gradient map' but for all the tools and 'bells' of PSCS3
Are there any weblinks with that info, books?
0
Comments
Adobe doesn't advertise what's under the covers, although many of the features are standard image processing techniques.
A great resource is the following website:
http://members.ozemail.com.au/~binaryfx/
Stephen Marsh gets deeper than most, and he contributes frequently to this forum.
It can give you a more technical view into the bells and whistles, like what a tool looks for in an image and what it's going to do with it.
Using the Gradient Map as an example; the help on it says that it makes a gradient from the current fore- and background colors, and the maps the grayscale values of the image to it. Effectively, it's a duotone conversion.
Is this the kind of info you were looking for?
http://pyryekholm.kuvat.fi/
I tried the help on board and a lot of books but I am looking for indepth information to understand what the used tool/item is doiing. It should help me understand why using technique A in stead of technique B for having a good result.
As there are so many ways leading to Rome (like f.i. converting tot B&W) it depends on your basic photo what gives you he best result.
Maybe my question is notpossible to look for an answer.
How can you visualize this? You can think of it as a way to take a one-dimensional color space (luminosity) and curl it like a flexible string any way you like inside of a three-dimensional color space. Then all the colors in the resulting image will be somewhere along that path, depending on initial gray value.
What is gradient map good for? Lots of things. You could use it to convert a black-and-white image to any kind of sophisticated “toned” output image you like. You could use it to convert a scale of grays into a scale of hues. You could use it as part of some bigger adjustment layer scheme with tricky blend modes to affect all three color channels based on a single computed channel (luminosity).
I don't particularly like the *interface* of the gradient map tool, but it is certainly one of the most powerful and sophisticated that Photoshop has to offer.
(Much of this detail comes from Chris Cox. When the docs don't include something and you can't figure it out any other way, there's always asking Adobe engineers themselves as a last resort.)
Thanks John, a site that I like that goes into many of these things is:
http://tech-slop.serveit.org/wiki/index.php?title=Photoshop_tutorials
Stephen Marsh
http://members.ozemail.com.au/~binaryfx/
http://prepression.blogspot.com/
http://members.ozemail.com.au/~binaryfx/
http://prepression.blogspot.com/