Adobe 13101332 User Guide - Page 62

Adobe Photoshop Help Using Help | Contents | Index Getting Images into Photoshop and ImageReady Back 62 Vector graphics are resolution-independent-that is, they can be scaled to any size and printed at any resolution without losing detail or clarity. As a result, vector graphics are the best choice for representing bold graphics that must retain crisp lines when scaled to various sizes-for example, logos. 3:1 24:1 Example of a vector graphic at different levels of magnification Because computer monitors represent images by displaying them on a grid, both vector and bitmap data is displayed as pixels on-screen. About image size and resolution In order to produce high-quality images, it is important to understand how the pixel data of images is measured and displayed. Pixel dimensions The number of pixels along the height and width of a bitmap image. The display size of an image on-screen is determined by the pixel dimensions of the image plus the size and setting of the monitor. For example, a 15-inch monitor typically displays 800 pixels horizontally and 600 vertically. An image with dimensions of 800 pixels by 600 pixels would fill this small screen. On a larger monitor with an 800-by-600-pixel setting, the same image (with 800-by-600-pixel dimensions) would still fill the screen, but each pixel would appear larger. Changing the setting of this larger monitor to 1024-by-768 pixels would display the image at a smaller size, occupying only part of the screen. When preparing an image for online display (for example, a Web page that will be viewed on a variety of monitors), pixel dimensions become especially important. Because your image may be viewed on a 15-inch monitor, you may want to limit the size of your image to 800-by-600 pixels to allow room for the Web browser window controls. 20" 15" 832 x 624 / 640 x 480 1024 x 768 / 640 x 480 Example of an image displayed on monitors of various sizes and resolutions Using Help | Contents | Index Back 62