PHYS1008 Study Guide - Final Guide: Image Editing, Image Compression, Mixture Model

• School: Curtin University
• Department: Physics
• Course: PHYS1008
• Professor: Cat Kealley

Document Summary

Alter or change an image to enhance diagnostic interpretation. Image segmentation, specify area of image you want look at, magnification, colouring. Improve the quality of images that have distortions or degradations. Reduce the size of the image to decrease transmission time and reduce storage space. Point processing, local processing and global processing operations. Input image matrix scanned pixel-by-pixel using (cid:858)pixel point process(cid:859) until the entire image is transformed. Value of one input image pixel is mapped onto corresponding output image. To understand lut and windowing, one must understand the concept of a histogram. Graph of the number of pixels in an image having the same grey levels (density values) plotted as a function of grey levels. Can be used to alter image brightness and contrast. Concentrated at higher end = brighter image. If values are concentrated in lower end = image dark. Changes the contrast and brightness of an image. Window width (ww) = range of the numbers.