| A | B |
|---|
| .psd | native photoshop format it uses layers and does not compress images |
| .eps | contains both vector and bitmapped graphics and is supported by all graphic, illustration and page layout programs |
| .tiff or .tif | supports different color formats and different applications it does not compress images |
| .gif | index color format commonly used on the world wide web |
| .jpg or .jpeg | rgb color format, it selectively compresses and discards data with every save |
| .pdf | cross platform document file format that preserves fonts, allows editing and a word search |
| .bmp | Windows image format supports RGB, Indexed Color, Grayscale |
| .pcx | IBM PC compatible image file |
| .pict | Mac image file format, supports RGB with a single alpha channel can be 16-bit or 32 bit |
| .nef | Nikon Raw Image uncompressed image |
| camera raw | camera specific proprietary file format |
| photoshop raw | flexible non-layered image format |
| .eps & .tiff | formats preferred for print |
| .gif,.pdf, .png & .jpg | formats preferred for web |
| .png | images can have background transparency with out jagged edges. Used primarily on the web but better quality than a .gif |
| RGB color mode | Red, Green and Blue color mode used for images on the web and in television |
| CMYK color mode | Cyan, Magenta, Yellow and Black colors used in offset printing. Made up of halftone screens of those colors |
| Indexed color | Color mode for .gif only 256 colors in an image |
| Bitmap Color | used primarily for line art and images containing only black and white and no shades of gray |
| Grayscale color mode | used for images having continuous tones of gray |
| Lossy | a format that compresses files such as .jpg |
| Lossless | a format that does not compress files such as .psd |
| lpi | lines per inch is a measurement of printing resolution in systems that use a halftone screen |
| ppi | pixels per inch - the number of pixels per inch in an image that affects the resolution of an image |
| vector | resolution independent graphics based on mathematical equations |
| Raster | the process of converting a vector image into a bitmap image |
| photoshop raw | Photoshop uncompressed file format conversion for proprietary camera formats |
| .dng | Adobe’s proprietary image standard that was created to store image data in a generic, highly-compatible format, unlike RAW files that have specific formats based on manufacturer and camera type. |
