In the final grayscale composite that Photoshop uses for selections, the pixels will be 240 levels luminance. Let’ say a pixel is 100 levels red, 20 levels green and 240 levels blue. Well, in a way! You see, concerning selections, what Photoshop does is that it calculates the overall “ grayscale image” by preserving the lightest pixel.
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So when it makes a selection it does so based on the difference between these 255 shades of black and white.īut wait, this is just one channel, and when I make selections all three channels are involved and that’s more than 255 shades of black and white, right? Wrong. If you don’t know about channels check this tutorial, but as a quick resume know that Photoshop sees each channel as a grayscale image with 255 shades of black and white. It works only with shades of black and white.
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Well, it may be color blind, but it is not Luminance blind. But how does it do adjustments, selections and so on if it is color blind? Strange, huh? One of the best raster (and implicit color) image manipulation tools, it’s completely unaware of the colors it works with. It doesn’t see the orange, blue or red colors. Photoshop doesn’t know a thing about colors. Before you even touch a selection tool you should know the inner workings of the process. This may be fine if you’re using Photoshop for personal use only, after all, your friends and family aren’t the greatest Photoshop experts and you can impress them with what you know already.īut if you are working for a client or maybe you want to go to the next level in Photoshop expertise then you really should master (at least the basics) Photoshop selections.
How to use magic wand tool in photoshop in star images software#
Sure, you may use the software just to color correct your images with the various Adjustment layers, or maybe you just like playing with the Liquify Tool or maybe all you do in Photoshop is paint.
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