Apply Discoloration with Apply Image.pdf

Apply Discoloration with Apply Image

by Al Ward

Action Fx Photoshop Resources

http://actionfx.com

Author, Photoshop for Right Brainers: The Art of Photo Manipulation

Author, ‘ Al Ward's Photoshop Productivity Toolkit’

Some days I almost feel like the ‘Anti-Photoshop Guy’. Not because I have anything against the software, Adobe, or image correction as a big bundled

whole, but because I often spend more time experimenting with the software to mess images up realistically, instead of correcting them. Superman had

Bizarro World, and I have… well, my office.

The key in the above statement is realism. Anyone can mess up a photo: splash some paint over a layer or run a face through the Liquify mill and you have

a messed up image. What I enjoy doing is making the subject appear messed up in their world, without appearing manipulated. Does that make sense?

This tutorial will help explain what I mean.

Let’s start with this meticulously restored military uniform: I’m guessing from the Civil War era.

Obviously someone has gone to great lengths to clean and press this uniform, restoring it to its original glory as best they could. Nice work… now how can I

mess this up? Well, the number of ways to stain this suit (which is what I’m going to attempt). We could create a layer, switch the Blending mode to Color,

and paint over it with any color we chose… that would certainly add discoloration (or at least change the hue of the fabric). I’m not going to do that. Rather,

let’s again explore Apply Image and see if that can be used to mess things up realistically.

First, we need a texture or pattern of some sort, in the form of a photograph. What would work? Let’s try this:

I’m not sure if that is the skin of a melon, a salamander or what! Anyway, it should work here.

Remember, with Apply Image the pixel dimensions need to be the same for both images. Ensure when you are doing this to change one of the images’ pixel

dimensions to match the other. In this case I don’t want to distort the suit photo, so I’ll change the size of the texture photo to match the suit photo.

Go to the suit photo. Duplicate the Background layer, and name the new layer stained.

Now we can go strait to apply image. What I’ve found about this particular feature is it warrants experimentation every time I use it. You have so many

options and settings that come in this dialog box, including channel selections, blending modes, masks and so forth that it often takes a little work to find

the best setting.

That being said, I know at the outset that I want to use the Subtract blending mode, and I want to use this on a mask. Why do I know this? Trial and Error,

my friend… it is as simple (or tedious) as that.

Ok, opening Apply Image, I’ve set my source to the texture photo. The rest of my settings are seen in the screen capture… let’s see what happens. Do not

close the Apply Image dialog box just yet.

Yikes! That isn’t what I want at all. Fortunately for me I haven’t done 2 things: I haven’t closed my Apply Image dialog box yet and I haven’t given up hope.

Back to the Apply Image dialog box. Again, via experimentation, I’ve found that by checking the Invert box at the bottom of the Apply Image dialog box with

the Gray channel selected , and working on a mask for the suit photo (Mask checked), I get results far closer to what I’m looking for.

Spots, stains, and nasty fold/water patterns appear, but remain invisible in the white areas. Now we are getting somewhere! Go ahead and click OK to

accept the Apply Image settings.

Ok, now we just have the small chore of cleaning up the area to the right where some of the pattern appears og the shadowed portion of the background.

I’m using the Polygonal Lasso to generate a selection of the offending areas.

Now I’ll simply create a mask for the stained layer, select the mask and fill the selected area with Black, 100% opacity.

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