OutlineForImageProcessing.pptVIP

Outline For Image Processing A Digital Image Processing System Image Representation and Formats 1. Sensing, Sampling, Quantization 2. Gray level and Color Images 3. Raw, RGB, Tiff, BMP, JPG, GIF, JP2 Image Transform and Filtering Histogram, Enhancement and Restoration Segmentation, Edge Detection, Thinning Image Data Compression Image Pattern Analysis Recognition and Interpretation [1] R.C. Gonzalez, R.E. Woods, S.L. Eddins, Digital Image Processing Using MATLAB, Pearson Prentice Hall, 2004 [2] R.C. Gonzalez and R.E. Woods, Digital Image Processing, Prentice-Hall, 2002+ Examples of Digital Images Image Processing System Digital Image Analysis System A 2D image is nothing but a mapping from a region to a matrix A Digital Image Processing System consists of 1. Acquisition – scanners, digital camera, ultrasound, X-ray, MRI, PMT 2. Storage – HD 120GB , CD 700MB , DVD 4.7GB , Flash memory 512MB~4GB , 3.5” floppy diskettes, i-pod, … 3. Processing Unit – PC, Workstation, PC-cluster 4. Communication – telephone lines, cable, wireless, … 5. Display – LCD monitor, laser printer, laser-jet printer Gray Level and Color Images Pixels in a Gray Level Image A Gray Level Image is a Matrix f 0,0 f 0,1 f 0,2 …. …. f 0,n-1 f 1,0 f 1,1 f 1,2 …. …. f 1,n-1 . . . . . . . . . f m-1,0 f m-1,1 f m-1,2 … …. f m-1,n-1 An image of m rows, n columns, f i,j is in [0,255] Gray and Color Image Data 0, 64, 144, 196, 225, 169, 100, 36 R, G, B for a color pixel Red – 255, 0, 0 Green – 0, 255, 0 Blue – 0, 0, 255 Cyan – 0,255, 255 Magenta – 255, 0, 255 Yellow – 255, 255, 0 Gray – 128, 128, 128 Image Representation Gray/Color A gray level image is usually represented by an M by N matrix whose elements are all integers in 0,1, …, 255 corresponding to brightness scales A color image is usually represented by 3 M x N matrices whose elements are all integers in 0,1, …, 255 corresponding to 3 primary primitives of colors such as Red, G