ImagesFromPDF lets you convert PDF pages into separate images.
This application enables you to convert each page of a multipage PDF file into a separate image and then rename and make sequential the resulting images. Supported formats: PDF, BMP, GIF, JPEG, JPEG 2000, PSD, PICT, OpenEXR, SGI, TGA, PNG and TIFF.
http://sourceforge.net/projects/imagesfrompdf/files/