CODEWITHSUNDEEP
imagematlab
matheburg
matheburg

Reputation: 2170

Problems with imshow update

Why is the image in a figure (ploted by imshow) changing its size when updated by another imshow?

Demonstrational Code:

img = rand(100,100);
figure(1);
hold on;
imshow(img); % plot an image
pause(1);    % pause for demonstrational reasons
imshow(img); % update the image

This is only happening at the first update.

Upvotes: 3

Views: 750

Answers (2)

user2613077
user2613077

Reputation: 78

The image is not changing size. You can see this by typing:

img = rand(100,100);
figure(1);
hold on;
whos img
pause(5);   
whos img

the following will be your result:

Name        Size             Bytes  Class     Attributes

  img       100x100            80000  double              

  Name        Size             Bytes  Class     Attributes

  img       100x100            80000  double

Upvotes: -2

Zero
Zero

Reputation: 76917

figure(1); takes default size and then when you plot imshow(img) after hold on size gets reduced relative previous figure(1) size.

Better approach would be

img = rand(100,100);
figure, imshow(img); % plot an image
hold on;
pause(1);    % pause for demonstrational reasons
imshow(img); % update the image

Upvotes: 5

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