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

1、 Digital Image Processing Project chapter： Chapter 6 Project number： Proj06-01 Proj06-04 Students name： Students number： Class： 1ContentsWEB-SAFE COLORS .2PSEUDO-COLOR IMAGE PROCESSING.2COLOR IMAGE ENHANCEMENT BY HISTOGRAM PROCESSING.5COLOR IMAGE SEGMENTATION.72Web-Safe ColorsExp. 20，PROJECT 06-01 O

2、bjective 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 colo

3、rs).(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.jpg1Technical discussion【1】B = fix(A) rounds the elements of A toward zero, resu

4、lting 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 listingsI=imread(Fig6.08.jpg);subplot(131);imshow(I);title(original); I1=fix(I/51

5、)*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);2Discussion of results originalweb-safe colors(jpg)web-safe colors(jpeg)Figure 2 results of project 06-013 Pseudo-Color Im

6、age ProcessingExp. 21，PROJECT 06-02ObjectiveTo 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

7、 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 ri

8、ver appears yellow and the rest of the pixels are the same shades of gray as in the input image. Figure 3 Fig6.22(a).jpg4Technical discussion【1】RGB componentsrgb_R=I(:, :, 1);rgb_G=I(:, :, 2);rgb_B=I(:, :, 3);Program listingsI=imread(Fig6.22(a).jpg);subplot(121);imshow(I);title(original);I=double(I)

9、;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)&(rr1_u+1.25*r1_d);r2(ind)=1; subplot(222);imshow(r2);title(segmentation); subplot(234);imshow(r);10title(R component); subplot(235);imshow(g);title(G component); subplo