Sony DSC-W55/B Cyber-shot® Handbook - Page 9

Basic techniques for better images Quality On "image quality" and "image size" A digital image is made up of a collection of small dots called pixels. If it contains a large number of pixels, the picture becomes large, it takes up more memory, and the image is displayed in fine detail. "Image size" is shown by the number of pixels. Although you cannot see the differences on the screen of the camera, the fine detail and data processing time differ when the image is printed or displayed on a computer screen. Description of the pixels and the image size 1 Image size: 7M 3072 3072 pixels × 2304 pixels = 7,077,888 pixels 640 Pixels 2 Image size: VGA 640 pixels × 480 pixels = 307,200 pixels 2304 480 Selecting the image size for use (page 24) Pixel Many pixels (Fine image quality and large file size) Example: Printing in up to A3 size Few pixels (Rough image quality but small file size) Example: An attached image to be sent by email Selecting the image quality (compression ratio) in combination (page 38) You can select the compression ratio when digital images are saved. When you select a high compression ratio, the image lacks the fineness of detail, but has a smaller file size. 9