While designing a Christmas Card, I needed to use the extract filter but it was nowhere to be found in Adobe Photoshop CS4.

I did some research online and apparently you need to it's part of a package that requires a separate install.

The following plug-ins and associated files are included in this package:

• Bigger Tiles


• Picture Package (ContactSheetII)


• ExtractPlus


• PatternMaker


• PhotomergeUI


• TWAIN


• Web Photo Gallery (WebContactSheetII) plus presets


• Textures for Texturizer


• script for Layer Comps to Web Photo Gallery

For Mac users, click here to download. The Windows version can be downloaded from here.

Finally, Corrie Haffly has written a post for SitePoint called "5 Great Background Masking Techniques in Photoshop."