How to fix this error if my image is not two dimensional?

Question

Atifah Samuri 2021-11-23

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https://ww2.mathworks.cn/matlabcentral/answers/1593344-how-to-fix-this-error-if-my-image-is-not-two-dimensional

回答： Dilla 2024-7-8，7:45

handclah = imread('hand2.jpg');
handclahe = adapthisteq(handclah, 'clipLimit', 0.02, 'Distribution', 'rayleigh');
figure, imshow (handclah);
figure, imshow (handclahe);

The error is shown below:

Error using adapthisteq

Expected input number 1, I, to be two-dimensional.

Error in adapthisteq>parseInputs (line 416)

validateattributes(I, {'uint8', 'uint16', 'double', 'int16', 'single'}, ...

Error in adapthisteq (line 155)

noPadRect, distribution, alpha, int16ClassChange] = parseInputs(varargin{:});

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Answer 1

Image Analyst 2021-11-23

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https://ww2.mathworks.cn/matlabcentral/answers/1593344-how-to-fix-this-error-if-my-image-is-not-two-dimensional#answer_837974

在 MATLAB Online 中打开

You're using it on a color image and you can't do that. It needs a gray scale image. To fix:

handclah = imread('hand2.jpg');
[rows, columns, numberOfColorChannels] = size(handclah)
if numberOfColorChannels == 3
    % If it's color, convert it to gray scale.
    handclah = rgb2gray(handclah);
end
handclahe = adapthisteq(handclah, 'clipLimit', 0.02, 'Distribution', 'rayleigh');
subplot(2, 1, 1);
imshow (handclah);
subplot(2, 1, 2);
imshow (handclahe);

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Atifah Samuri 2021-11-25

I see. Thank you sir.

Image Analyst 2021-11-25

That will solve the error you had, so could you click the "Accept this answer" link for my Answer? Thanks in advance.

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Answer 2

Yusuf Suer Erdem 2021-11-23

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1593344-how-to-fix-this-error-if-my-image-is-not-two-dimensional#answer_837949

在 MATLAB Online 中打开

tire.zip

Hello, I used these codes below and it worked for me. Could you try it too? I only used .tif format image instead of .jpg image. I upload my image for you too.

clc; clear; close all;
I = imread('tire.tif');
J = adapthisteq(I,'clipLimit',0.02,'Distribution','rayleigh');
imshowpair(I,J,'montage');
title('Original Image (left) and Contrast Enhanced Image (right)')