How can i plot the intensity of each row in an image?

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Amelia Biase
Amelia Biase 2017-7-12
评论： AKSHAY KUMAR 2019-3-12
This is what I have so far for my code. I was either going to use intensityValue or improfile but I don't really understand how it works.
I = imread('C:\Users\student\Pictures\2017-07-11\image.jpg');
warning('off', 'Images:initSize:adjustingMag');
%intensityValue= I (100,500);
%improfile
imshow(I);

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回答（2 个）

Prashant Arora
Prashant Arora 2017-7-17
编辑：Prashant Arora 2017-7-17
Hi Amelia,
I am assuming you have a 2-dimensional Image I. You can directly use the value in the image matrix to plot the intensity. For example:
I = imread('liftingbody.png');
x = 1:size(I,1);
y = 1:size(I,2);
[X,Y] = meshgrid(x,y);
plot3(X,Y,I)
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Walter Roberson
Walter Roberson 2017-7-17
Prashant Arora wrote "I am assuming you have a 2-dimensional Image I." . Your image is not 2D. You need to do rgb2gray to get intensity.
AKSHAY KUMAR
AKSHAY KUMAR 2019-3-12
after using rgb2gray it still shows the same image as that of attached file

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Walter Roberson
Walter Roberson 2017-7-17
编辑：Walter Roberson 2017-7-17
surf( rgb2gray(YourRGBImage), 'edgecolor', 'none' )
colormap(gray(256))
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Walter Roberson
Walter Roberson 2017-7-19
max() and mean() have different calling sequences. max(A, B) is element-by-element max(A(I,J), B(I,J)) unless B is empty, [], in which case max(A, []) is the same as max(A, [], 1) which is per-column maximum. max(A, [], 2) is per-row maximum.
mean(A,1) is per-column mean, and mean(A,2) is per-row mean.
Amelia Biase
Amelia Biase 2017-7-19
编辑：Amelia Biase 2017-7-19
how do i choose a single row in the image to analyze without using improfile?

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