How to select a part of an image for masking based on either color saturation or hue or a certain color (not RGB value but rather a color group), so that I can transform the selection to the Alpha channel.
For example, if I have a photo of a red car on a multi-color, complex background where there are NO other red colors exist on the picture, other than the body of the car, then such selection (that I need help with) suppose to select all shades of red on the photo, which is only the body of the car.
I guess you know what I'm trying to do, right? I need to create a PNG file where certain part of an image (like a body of that car) would be gray-scale alpha channel, so that by placing the image file on colored background - that would simply paint the car into another color.
See an example on this page: http://www.netchain.com/test/Png.asp
You already have several tools to do that. From the magic wand to color range and the quick select tool.
Also, it sounds like you have alpha channels and transparency confused.
You're asking for U-Points.
I wish Adobe will implement similar technology for Masking / Selection.
I would even settle for a Plug In from Nik Software with the same usability as in Nikon Capture NX.
The Photoshop Plug In (Viveza) isn't even close (Whereas in Capture NX U-Points are selection / masking tool you can apply any filter / adjustment locally Viveza just let you do some local enhancements, for instance you can't locally sharpen using it or apply a certain filter / Plug In).