Computer Science 1033A/B Lecture Notes - Lecture 2: Upsampling

• School: Western University
• Department: Computer Science
• Course: Computer Science 1033A/B
• Professor: Vivi Tryphonopolous

Document Summary

An image that has literally been drawn/edited/touched up with digital manipulation. Photoshop basic fundamentals: all photo images are bitmapped images, bitmapped images (raster images): smallest unit of an image is the pixel. Blocky when increase in size: vector images: are scalable will not be blocky if you increase or decrease size. Resolution independent = takes on resolution of output device. Total # of pixels: 2046 x 1536 = 3, 145, 728: smaller to larger dimensions will result in blurriness, downsampling (scaling down): eliminating pixels and deleting information and detail from your image technique = decimation . Eliminates by averaging the values of source pixels contributing to each output pixel. Casts off unnecessary information by averaging together pairs of pixels, or groups of pixels. Decimation is using the bicubic sharper: upsampling (scaling up): adding pixels through a technique called. Photoshop analyzes the colors of the original pixels and. Manufactures new pixels which are added to the existing ones =