Extracting images from PDF files can be simple task if PDF file is not big, you just need to use print screen feature if save as image option is disabled in PDF file. However if PDF file is big then it can be very inconvenient to use print screen or save as image option.
In such cases PDF to JPG tool can become handy tool. PDF to JPG is command line utility to extract all jpeg files from pdf without any jpeg recalculation.
PDF to JPG in Action