Sometimes we have to "crop" an image from PDF documents. So we need a program that capable to open pdf doc and convert image form pdf pages to image format.
STDU Viewer is one of the softwares that really could do this. STDU Viewer supports TIFF, PDF, DjVu, XPS, JBIG2, WWF document formats. These are the most popular formats for scientific and technical documentation. We can make selection to the special image that we want to crop, or even one or more page could be convert to the images by this software. And for editing the image we may use the simple as Microsoft Picture Manager or the higher like photoshop.
