Tips and useful information about graphics and images Vector vs. Raster Graphics and Images Vector Graphics are made using drawing or illustration program (such as Adobe Illustrator). Vector graphics can be scaled (enlarged or reduced) without any loss of resolution. Vector graphics typically are saved as EPS format. Your logo should, when possible, always be supplied as a vector file. ALWAYS ask your graphic artist to design you logo in a raster based format. This will ensure the integrity of your logo no matter what your usage may be. From gigantic billboard applications to your business card, a solid vector logo won't let you down.   Raster images are composed of pixels. Raster images typically are saved as tif (or tiff) format, but can be saved as eps as well. Raster graphics are greatly impacted by reducing and enlarging. Photos from your digital camera and scans are raster images. Resolution & File Formats PPI & DPI definitions PPI= Pixels per inch DPI= Dots per inch Resolution - is it big enough? Most print work requires a resolution of 300 dpi. Here is a quick guide to see if the resolution of your image will be large enough for the intended usage: Resolution - is it big enough? 1.38 MB = 2 inches x 2 inches @ 300dpi (or 600 pixels x 600 pixels) 5.5 MB = 4 inches x 4 inches @ 300dpi (or 1200 pixels x 1200 pixels) 32.2 MB = 8.5 inches x 11 inches @ 300dpi or (2550 pixels x 3300 pixels) It is best to save scanned images as either tif, or eps format. These image formats will preserve the color and sharpness of your pictures the best.