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

14 vues (au cours des 30 derniers jours)
Amelia Biase
Amelia Biase le 12 Juil 2017
Commenté : AKSHAY KUMAR le 12 Mar 2019
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);

Réponses (2)

Prashant Arora
Prashant Arora le 17 Juil 2017
Modifié(e) : Prashant Arora le 17 Juil 2017
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)
  5 commentaires
Walter Roberson
Walter Roberson le 17 Juil 2017
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 le 12 Mar 2019
after using rgb2gray it still shows the same image as that of attached file

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Walter Roberson
Walter Roberson le 17 Juil 2017
Modifié(e) : Walter Roberson le 17 Juil 2017
surf( rgb2gray(YourRGBImage), 'edgecolor', 'none' )
colormap(gray(256))
  12 commentaires
Walter Roberson
Walter Roberson le 19 Juil 2017
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 le 19 Juil 2017
Modifié(e) : Amelia Biase le 19 Juil 2017
how do i choose a single row in the image to analyze without using improfile?

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