Edit Images in PDF files

Due to the light weighted and compact nature of the PDFs or commonly known as portable document files, they are popular for sharing information online. Unlike the .doc files that require the reader to have fonts and other formatting features on his computer in order to view the document PDFs display information to the recipient as is defined by the author.
You must have come across PDFs that contain images and pictures but it is not possible to extract these images directly from the PDF reader itself and in most of the cases you have to take a screenshot using your operating system that is installed and then crop it through a photo editing software.
On a PC
There are many ways in which you can crop photos from a PDF on a PC. If you a user of Windows Vista or Windows 7, you can make use of the Snipping tool.
Open the PDF document.
Scroll down to an area where the image is in full view.
Press the Win key.
On the search box, type “snipping tool.” Click the “Snipping tool” icon in the results under “Programs.”
Click the New button, and select Rectangular Snip.
Drag your cursor from one corner of the image into another, so that you get the image just as you like it.
Save the file.
If you’re using Windows XP, you can simply copy the desktop image into your clipboard, and edit it from there.
Open the PDF document, such that the image is in full view.
Press Print Screen to capture the screenshot into your clipboard.
Open an image editing software. You can use Adobe Photoshop, or even the basic Picture Manager that comes with Microsoft Office.
Create a new picture with dimensions which are similar to your desktop. If you’re using Adobe Photoshop, the software will automatically adjust the size to accommodate the image in your clipboard.
Paste the image by clicking Edit then Paste. Or simply press Ctrl-V.
Crop the picture using photo editing software’s cropping tool.
Save the file.
As can be inferred here that cropping an image from PDF is the easiest in the Mac, Windows Vista and Windows 7 because of the snipping tools, which are easily available.
On a Mac Operating System
It is quite an easy task to crop photos from a PDF file on the Mac. There are many ways to do this. Firstly you are required to take a snapshot of the image which is automatically saved as a PNG file.
Open the PDF file you want to get the picture from.
Scroll through the file such that the image is in full view.
Press CMD-SHIFT-4. Your cursor will change into a cross-hair or “target” like image.
Drag your cursor from one corner of the image to another. You will hear a clicking sound, like a camera shutter taking a picture.
This image will be saved on your PC desktop in the form of “Picture X.PNG” where “X” is the numerical sequence in which the snapshot was taken. This can be renamed as well. PNG files are, by default, viewable on web browsers, so this can even be used online.