How to open .mat files and simply explore the content in it?

How to open the following .mat file and explore it in matlab editor.

I tried to load it using 'load' command and used 'imshow' but it is not working.

[Stephen23]

"How to open the following .mat file and explore it in matlab editor."

The MATLAB Editor is a text editor designed for displaying text files. A text editor is very unlikely to be useful for viewing the contents of a binary file (like a .mat file) in a way that makes any sense. Why not use a more appropriate feature, e.g. the Variables Editor?

https://www.mathworks.com/help/matlab/matlab_env/create-and-edit-variables.html

[Harsha Priya G]

I tried the following code:

storedStructure =  load('SUN_urls.mat');
figure(1);
imshow(1);

[Stephen23]

" I tried the following code: storedStructure = load('SUN_urls.mat'); figure(1);imshow(1);"

The .mat file contains one structure array of size 1x900 with three fields:

1. category : an alphabetical list of objects
2. annotation : URLs to some XML files
3. images : URLs to some JPG files

The .mat file does not contain any image data. To get the images you will need to download them from those URLS.

https://www.mathworks.com/help/matlab/matlab_prog/access-data-in-a-structure-array.html

[Harsha Priya G]

How to open these filler_images.mat,target_images.mat,target_features.mat?

Data Link: https://rb.gy/vbxegz

Kindly help out.Thanks in advance.

Answer 1

[Ameer Hamza]

Your mat file contains a struct array. Which does not contain the images itself, but the url of images. You need to use imread() to load those images and then use imshow(). Here is an example

data = load('SUN_urls.mat');
SUN = data.SUN;

url = SUN(1).images{1};
img = imread(url);
imshow(img);

[Harsha Priya G]

Thanks it worked for me.

How to get all images at once?(may be some images atleast!!!).

How do I explore/get the precomputed features and annotations from this dataset in matlab ?

My Data Link: https://rb.gy/vbxegz

Thanks and you and your team are amazing with problem solving.

I'm awaiting for your response.

[Ameer Hamza]

You can write a loop and go through all the URLs to download them. I am not sure how the pre-computed features and annotations are available.

[Harsha Priya G]

How to open these filler_images.mat, target_images.mat, target_features.mat?

My Data Link: https://rb.gy/vbxegz

I tried as same format above but couldn't see what is in it..