digital image processing projects 数字图像处理 冈萨雷斯 第六章所有程序和报告.doc

Digital Image Processing Project chapter Chapter 6 Project number Proj06 01 Proj06 04 Student s name Student s number Class 1 Contents WEB SAFE COLORS 2 PSEUDO COLOR IMAGE PROCESSING 2 COLOR IMAGE ENHANCEMENT BY HISTOGRAM PROCESSING 5 COLOR IMAGE SEGMENTATION 7 2 Web Safe Colors Exp 20 PROJECT 06 01 Objective To know what are Web safe colors how to generate the RGB components for a given jpeg color image or convert an image to RGB manually Requirements a Write a computer program that converts an arbitrary RGB color image to a web safe RGB image see Fig 6 10 for a definition of web safe colors b Download the image in Fig 6 8 and convert it to a web safe RGB color image Figure 6 8 is given in jpg format so convert your result back to jpg see comments at the beginning of this project Figure 1 Fig6 08 jpg 1 Technical discussion 1 B fix A rounds the elements of A toward zero resulting in an array of integers For complex A the imaginary and real parts are rounded independently 2 imwrite A filename fmt writes the image A to the file specified by filename in the format specified by fmt Program listings I imread Fig6 08 jpg subplot 131 imshow I title original I1 fix I 51 51 subplot 132 imshow I1 title web safe colors jpg imwrite I1 web safe colors jpeg jpeg subplot 133 I imread web safe colors jpeg imshow I title web safe colors jpeg 2 Discussion of results originalweb safe colors jpg web safe colors jpeg Figure 2 results of project 06 01 3 Pseudo Color Image Processing Exp 21 PROJECT 06 02 Objective To know when the highpass filtering Hhp u v can be obtained by using the relation 1 Hlp u v Requirements a Implement Fig 6 23 with the characteristic that you can specify two ranges of gray level values for the input image and your program will output an RGB image whose pixels have a specified color corresponding to one range of gray levels in the input image and the remaining pixels in the RGB image have the same shade of gray as they had in the input image b Download the image in Fig 6 22 a and process it with your program so that the river appears yellow and the rest of the pixels are the same shades of gray as in the input image Figure 3 Fig6 22 a jpg 4 Technical discussion 1 RGB components rgb R I 1 rgb G I 2 rgb B I 3 Program listings I imread Fig6 22 a jpg subplot 121 imshow I title original I double I m n size I L 256 for i 1 m for j 1 n if I i j L 4 R i j 0 G i j 4 I i j B i j L else if I i j L 2 R i j 0 G i j L B i j 4 I i j 2 L else if I i j r1 u 1 25 r1 d r2 ind 1 subplot 222 imshow r2 title segmentation subplot 234 imshow r 10 title R component subplot 235 imshow g title G component subplot 23