I'm trying to remove the background from pictures and PDFs.

Hello All, this is the 3rd or 20th time I've tried removing backgrounds. I install water equipment for a living and try to manage my website on my own. Each time my products change, my suppliers send me literature in PDF format. Sometimes I'm installing the equipment before I have the literature. I take pictures of every install I perform and would love to use my pictures without the dirty basement in the background.
I've spent hours trying to work with just one picture. All that fine detail, erasing, and zooming in and out, then click! I lose it, or can't save it, or it just doesn't work. I've watched tutorials, and watched it done right in front of me (on a PC) at my print shop. I thought I'd ask this community, because I've had 100% luck on here everytime.
So, can I use the same software to remove images from PDFs and backgrounds from pictures? Which do you recommend? I have Adobe Photoshop CS2 and Adobe ImageReady CS2. I also have Gimp that I downloaded for Mac. Since I've never been successful with any of them, I'm not sure which one is wasting my time.
Thank You,
Steve

Extracting images and removing backgrounds can be very complicated. There are many different techniques and methods for doing it: the trick is finding the right one for the image you're working on. Every image is different and what may work for one may not work for another. You can do all of the basic techniques in Photoshop CS2, though it's a little easier in newer versions. I'd recommend going through as many online tutorials on image extraction as you can tolerate. There are hundreds of them. (While I find him annoying to listen to, Russell Brown has made some excellent tutorials on the subject. Try this one to start.
While it is possible to edit an image embedded in a PDF, you really need Acrobat Pro to do it. Acrobat sends the image to Photoshop, where it can be edited, and then Photoshop sends it back to Acrobat after you're done. Or you can save it as a separate file. In the 20+ years I've used Adobe's stuff, I've never done that. It's usually much easier to do a screen capture of the image and then work on that copy. (There are some sizing and magnification issues involved with this, however.)
In Photoshop, pay particular attention to Quick Mask mode, learn how masking works, how to make a selection based on a color range, how to use the Pen Tool to make a path that can be used as a selection, and how to save and load selections. Getting a clean extraction takes a lot of practice and it's almost never quick or easy, but it's worth the effort to learn how to do it well.

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