lecture4 Data and Graphics 2011

Astsincetheirvaluesmustalsobe storedforeachpixel

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Unformatted text preview: would have 3 bytes, one each for the intensity of red, green, and blue respectively (0,0,0) would still be black, while (255,0,0) would be red, (255,255,255) is white, etc. This is commonly called RGB (Red, Green, Blue) RGB typically uses 3 bytes (24 bits) for each pixel so that equates to 16,777,216 different possible colors Image Resolution Image Resolution Resolution (Accuracy) is determined by two primary factors, pixel size and number of pixels Higher Resolution renders an image with greater accuracy for any given size Resolution is directly proportional to number of bits available for storage (memory) Color accuracy is also proportional to memory as is brightness and contrast since their values must also be stored for each pixel There is a delicate balance between image size and apparent resolution Advantages of Bitmap Graphics Advantages of Bitmap Graphics It is easier to create hardware to go from a bitmap representation to the actual display on the monitor (which is why monitors use bitmaps) It is easier to draw pictures of things with imprecise boundaries, (or that consist of so many parts it would not be feasible to draw them all) Your PC utilizes Bitmap Graphics to display everything that appears on your screen Ability to create multiple layers which can be overlayed to create composites Original Image Original Image Magnified Magnified Bit Map Demo Bit Map Demo Photoshop/...
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This note was uploaded on 03/03/2013 for the course CSCI 0020 taught by Professor Stanford during the Spring '08 term at Brown.

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