The program content is described as follows:
1. Display the histogram of the image
2. Histogram equalization is used to enhance the contrast of the image, and display the image before and after histogram equalization and the histogram of the image
The program code is as follows:
%Part 1
h=imread('cameraman.tif');
subplot(1,2,1),imshow(h);
subplot(1,2,2),imhist(h),
grid on,
ylabel('pixel count');
%Part 2
h=imread('cameraman.tif');
subplot(1,6,1),imshow(h);
g=histeq(h,40:60);
j=imadjust(h,[0.3,0.7],[]);
subplot(1,6,2),imshow(g);
subplot(1,6,5),imhist(g);
subplot(1,6,3),imshow(j);
subplot(1,6,6),imhist(j);
subplot(1,6,4),imhist(h),
grid on,
ylabel('pixel count');The procedure principle is as follows:
part1, use the imread function to read the image cameraman.tif in the computer disk, use the function imshow to display the image in the image window, and then use the function imhist to obtain the histogram of the image and display it in the image window.
part2, respectively use the function histeq and the function imadjust to equalize the histogram of the image cameraman.tif to enhance the image contrast. We use the function imshow to display the original image, the image processed by the function histeq and the image processed by the function imadjust in the image window, and then use the function imhist to display the histograms of the three images in the image window.
The result of the program running is as follows:
part1：
Figure 1: Image cameraman.tif and its histogram
part2：
Figure 2: Original image, contrast-enhanced image, and histogram of each image
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