This is an alternative way of how to extract images in Photoshop using the "Filter -> Extract" tool.
Works in any Photoshop 7 or more (dunno about less)
I'll be using this image as the example (reduced the image size):
Image artist is Murakami Suigun.
Ok, after opening the scan, duplicate its layer (we don't want to work on the original one, in case something gets ruined and need to be re-extracted) and got to Filter -> Extract.
A similar window will open, select the magnifying tool and magnify as much as possible (check the following screenshot, I zoomed at the left head part).
Now, select the brush, set the brush size (I usually use either 3 or 5) and go slowly around the border with it. Remember, both parts must be selected, the cut-off part and the remaining part (see the screenshot for example).
When you're done with all the scan (this will take quite a lot of time ) Select the Fill tool, and color all the parts that you want to keep (it's important that all parts all selected!)
When you're done with that, select the Smooth (under extraction, on the right side - I usually use 3, you can change that later when previewing) and hit preview.
Slowly go around the borders, and if you notice a bad extracted part, use the next 2 tools to correct it.
- Clean up tool (C): Lets you erase the redundant part.
- Edge Touchup tool (T): lets you fixed the too much extracted part; This tool is quite ”bothering" one, since it doesn't always listen to you xD And sometimes it deletes instead of retouch the image xD. It needs quite a lot practice to be used, for start I suggest holding the ctrl key when using it.
When done with the extraction, just hit OK (and be sure that none of force background stuff is selected )
The finished result can be found here
If I'm not too lazy, I'll also make an in-image tutorial ^_^;;