PHOTOSHOP AGAIN

1.  Start Photoshop.  Any idea why it should take so long?  Maybe they
	just want us to read their names and think about the development
	team.

2.  Download this image and open this in photoshop:

	http://www.cs.wustl.edu/~loui/100f04/zoo1.jpg

3.  These two lovely pictures were scanned together.
	Cut them into two separate pictures.

4.  The scanner introduced all sorts of blemishes, especially
	lint that shows up as dots, but also white scratches
	and hair, dark scratches, etc.

	Remove all of these blemishes and repair the image.

	What?  No help?

	OK,

	First, find one of the offending lint spots and
	try your blur tool.

	Ouch.

	Second, try copying some neighboring piece of the image
	and paste it right on top of the lint.

	That's better, but definitely not something you want to
	do 1000 times.

	Ask your TA to show you how the rubber stamp tool works.

	Oh my, what an improvement.

5.  You are not out of the woods yet.  You need to rubber stamp in
	the right direction.  Notice how if you get it wrong,
	you mess up the image.  Don't do that.

	Also, be sure you are repairing real flaws, not, e.g., lines
	of basalt infused in rock that appears at first sight to be
	scanner hair.  In the worst case, you will remove whiskers
	and legitimate texture on the coat of the seal or the 
	reflections of light on the rock.  Don't do that.

	Also notice that the correct sized brush really makes a big
	difference.  

6.  My dog thinks she's a seal, too.  She wants to be in the image.
	Download one of her pictures from this page:

	http://www.cs.wustl.edu/~loui/tigphoto.html

	You are going to have to put either the seal in one of
	antigone's pictures, or you will have to put antigone
	in one of the seal's pictures.

7.  You might want to ask the TA how brushing quickmask can be done in
	Photoshop.  It took me years to learn this, but now I am
	pretty good at it.  It has to do with the little circles
	under the palette foreground and background colors, if you
	want to try to play with it yourself.  It's a lot faster than using the
	magic wand over and over, though you may find it easier
	to do just that.

	In any case, mask either the dog or the seal, so you can copy
	and paste onto the other image (seal or dog, respectively).

	Scale the paste so it is reasonable.  If you have any talent
	for the visual arts, you might want to mask the background part
	of the receiving image first, so you can "paste into" the selected
	area, thus creating occlusion (one object in front of the other).
	Or you might just make it look like pre-15th Century pre-perspective
	naive art.  Your choice.

	You have to fix the colors.

8.  If the TA thinks you did a good job, you're done.  My bet is there will
	be some suggested revisions.  This is a fairly hard task for newbies.

	There is a photoshop expert artist sitting next to me who just
	suggested a different method.  Forget the masks completely.  Just
	paste one image on top of another, and set the opacity to about 50%
	so you can see the lower layer through the upper layer.

	Now take your eraser, and start erasing the parts of the upper layer
	you don't want to keep.  You might have to magnify and change the size
	of your eraser.

	When you want to preview how it looks, set the opacity back to 100%.

	Going back and forth like this, you should have a lot of control,
	even if you are a newbie.