JPEG (managed by joint photographic experts group) – a standard image compression software program.it is lossy or i other words some of the image quality is sacrifices in exchange for file size reduction. JPEG works by dividing up the image into the 8’8 pixel squares. using JPEG format the camera has options for how much compression is used in the images, these being fine, normal or basic usually. at the fine setting the compression is low and there’s minimal image quality loss. the basic setting uses a lot of compression and will degrade the image quality by a lot.
PDF (portable document format developed by adobe) good for saving layered documents, but the main purpose of the PDF format option is to allow all computer users (windows or mac) to view, review and print documents saved in it. PDF files are mostly useful for documents such as articles in magazines, flyers, or brochures as you want to show the original appearance as it was online. PDF file contains one or more page images, all you can zoom in on or out of. You can go forward and backward from every page.
TIFF (tagged image file format, originally created by Aldus for use in desktop) was intended to be used by people who need to edit photos, storing raster graphics images and is popular among graphic artists, the publishing industry but also amateur and professional photographers in general.
RAW (RAW being the picture not as say a visible or digital image but a file and numbers) contains minimally processed data and is a very large file as it has not been compressed. Raw files are named so as they are not processed and therefore are not ready to be printed or edited with a bitmap graphics editor. this format is good for portraits and head shots use as there is not loss in quality due to compression to another format before editing has begun.
PSD (Photoshop document) a PSD file is a layered image used in adobe Photoshop and PSD is the default setting that Photoshop uses for saving data. PSD is a proprietary file which allows users to work with the images individual layers even after the file has been saved. (after an image is completed Photoshop allows users to flatten down the layers and covert, or compress, the image into a JPEG, TIFF or GIF file format.