Zoom Image Matlab?
26 views (last 30 days)
Show older comments
denis bertin
on 3 Nov 2017
Commented: Walter Roberson
on 11 Feb 2020
Hi,
please want to zoom my image; How can i do please?
I done this code:
load navatalungo_H.asc
NP1 = 1151;
xx=linspace(0,0.02*(NP1-1),NP1);
imagesc(xx,t,navatalungo_H')
0 Comments
Accepted Answer
Walter Roberson
on 3 Nov 2017
However, if you want to zoom to a particular section then the easiest way is to set the axes xlim and ylim . When you do this you should take into account that the xx and t coordinates are the coordinates of the centers of pixels, so you would want to nudge the limits a little to the left or right to include whole pixels.
Note: when you pass x and y values to image() or imagesc() or imshow(), then only the first and last values are paid attention to. If you need a non-linear presentation of an image you need to handle it a different way, such as using pcolor(), or texture mapping your image onto a surface or patch.
11 Comments
Walter Roberson
on 4 Nov 2017
If you look at Cattur1.PNG that you posted first, the background color is white and the content of the image happens to be mostly blue. I think the blue is your image, not background.
More Answers (1)
Image Analyst
on 4 Nov 2017
See attached zoom demo, given to me by the Mathworks.
3 Comments
Walter Roberson
on 11 Feb 2020
You can create Questions in MATLAB Answers.
Image Analyst does not accept private correspondence.
See Also
Categories
Find more on Axis Labels in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!