Why is imhist() not clipping data?
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I can't seem to find out why that imhist plots aren't clipping the data. Or why the color bar is inside of the plot.
figure, sgtitle(strcat('Number of intensity levels = ',string(n_lvls)))
subplot(2,2,1), imshow(og_img), axis image, title('Original small matrix')
subplot(2,2,2), imhist(og_img), ylim([0 1000]), title('Original Image Histogram')
subplot(2,2,3), imshow(histeq(og_img)), axis image, title('Histogram equalized')
subplot(2,2,4), imhist(histeq(og_img)), title('Histogram equalized image histogram')
1 个评论
Could you provide the necessary data so we can attempt to reproduce this?
Also, whenever you report a problem like this, always include the software version number. (see ver).
You may also want to review, https://www.mathworks.com/help/matlab/creating_plots/resolving-low-level-graphics-issues.html
回答（1 个）
Image Analyst
2020-10-4
This works fine for me
og_img = imread('cameraman.tif');
n_lvls = 100;
figure, sgtitle(strcat('Number of intensity levels = ',string(n_lvls)))
subplot(2,2,1), imshow(og_img), axis image, title('Original small matrix')
subplot(2,2,2), imhist(og_img)
% ylim([0 1000])
title('Original Image Histogram')
subplot(2,2,3), imshow(histeq(og_img)), axis image, title('Histogram equalized')
subplot(2,2,4), imhist(histeq(og_img)), title('Histogram equalized image histogram')
Why are you calling ylim?
3 个评论
Zackary Coburn
2020-10-4
Sorry, I uploaded the code with ylim unintentionally. I was trying to troubleshoot the problem with that. The image I uploaded was the output without ylim in the code.
This is another example code and I am using R2020b.
clc, clear, close all
Eye = imread('DR_eyeball.jpg');
Eye_gray = rgb2gray(Eye);
figure, sgtitle('Grayscale and Histogram Equilization')
subplot(2,2,1), imshow(Eye_gray), axis image, title('Original Grayscale')
subplot(2,2,2), imhist(Eye_gray), title('Original Grayscale Histogram')
Image Analyst
2020-10-5
It appears sgtitle() is causing the gray scale wedge to appear in the wrong place. I'll contact the Image Processing team developers about it. If you take out sgtitle() it seems to work fine.
Zackary Coburn
2020-10-5
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