Saving an Image From a PDF File
Many PDF files you will find on the internet have some of the high quality images embedded into it and they can be very helpful for a PowerPoint Presentation. To get a picture out of a PDF file, you simply use the old technique of copy and paste. Follow the steps below:
1. Open Your PDF file.
2. There’s a tool in Adobe Reader called “Snapshot Tool”. It’s a small button with a little picture of a camera on it. Looks like this: 
3. Once you have the Snapshot Tool selected, then marquee the picture you want. The picture is automatically copied to your clipboard.
4. Simply open a program like Microsoft Paint and “paste” the screenshot. Then save it as a JPEG.
AjaxFAN said,
November 14, 2006 @ 5:13 pmmany people fail to realise how these kind of simple tools already exist in the Adobe Reader. You can also take the screenshot of the whole screen with the image and paste it in a program like Microsft paint but that is a lot of work since you will need crop out the screenshot to get to the picture you want. Anyway, this is a great article. Thanks.