How to download image files on MatlabR2020a

I am learning images. The Assignment asks to download file like 'rose.jpg', 'time.jpg' and 'speed.jpg' etc. type of files, and then check its various cropped formats. However, I am not able to download/upload such files on my desktop, that means I don't even find such files? Why I am facing this issue? Can someone guide and assist?

Thank you in anticipation.

[Walter Roberson]

Does it say where to download them from?

If the images are shown an a web page, then you should probably right-click the image and use Save Image As

[Dr. Alka Tomar]

Thank you for the reply.

My issue is, that for the assignment on Chapter "Student Exercise: Images as Data and the Colon Operator", instructions directed- " Download- Here's the link to the intro packet (ZIP download, 20 MB)".

So, this Intro packet was downloaded, and uploaded on Matlab. But, the files 'rose.jpg', 'time.jpg', 'speed.jpg' etc. are not visible. Also, no pictures are showing up. Further, chapters can not be understood due to this reason. I can not understand what is the issues here. If you could guide and please help why I am facing this? Why I am not able to solve this assignment yet?

Thank you again.

[Walter Roberson]

http://www.hms.harvard.edu/bss/neuro/bornlab/qmbc/beta/

[Ameer Hamza]

Dr. Alka comment posted as answer moved here:

By the way, forgot to reply your second comment, that the images are not also visible on a web page, hence could not proceed ahead with the assignment from that mode also. I think they are on the downloaded folder (zipped), but I am not able to access to these, as I am still learning to do it.

Professor instructed on the video to download that folder, which I have replied just before this reply to you too. Pl go through my reply, and guide.

Thank you again.

Kind regards.

[Ameer Hamza]

Dr. Alka comment posted as answer moved here:

Thank you for quick reply and the referenced link. However, the files are not found there too.

My issue is I have to upload these files, viz., 'rose.jpg', 'time.jpg', and 'speed.jpg', so that the assignment may be replied. I need to upload these files on the assignment page, and the downloaded 'Intro packet (ZIP, 20MB)' has it, but I am not able to access to it.

So, I want to learn method or syntax by which I may get access to that.

Kindly guide.

Thank you again.

[Ameer Hamza]

Are you using MATLAB desktop or MATLAB online? Have you extracted the zip file? Can you see these image files using file browser?

[Dr. Alka Tomar]

Thank you again.

• Am using MATLAB Desktop.
• Yes, extractd zip file.
• I could not see the files anywhere.

[Ameer Hamza]

Yes, I also checked the link of the zip file you shared. It does not contain these images. You need to ask the creator of the course about these files. Only they can answer these question reliably.

[Walter Roberson]

The course was created in 2011 to 2012. It used images that do not appear to have ever been part of MATLAB. It is not clear whether the images are still available anywhere.

In my opinion, no-one should be giving out assignments based upon beta material from 2012.

[Dr. Alka Tomar]

Thank you for the replies.

Answer 1

[Dr. Alka Tomar]

But, other participants in the course can do this. Like this participant, she is downloading array, but can not see image, as she writes as under;

"how to i dispay the image in matlab?

discussion posted 17 days ago by uchristina12

when am typing im = imread(rose.jpg) a list of numbers is displaying not the image , I need help on how to put the image in matlab"

--- That means we have some issues with us, and not the course.

I have no way to reach the creators, or else I would have asked them there instead of here.

Don't know how to solve this. As rest of the chapters are dependent on this basic function. I am not able to proceed ahead into the course. If anyone can understand what is this all about?

[Walter Roberson]

Ask the other students where they found the files.

I checked back to R2010bsp1 but could not find the files you name: they do not appear to have ever been part of MATLAB, in any of the toolboxes I have access to (which is a fair number.)

Answer 2

[Walter Roberson]

There is no MATLAB function that can permit you to download arbitrary images when you do not know of a location for the image.

In the case where you know the location of the image:

Since R2006b or so, urlwrite() has been able to download from URL and save to disk.

Since R2013a and possibly earlier, imread() has been able to read images from URL into memory (and you could then imwrite())

Since R2014b, websave() has been able to download from URL and save to disk.

If you are using MATLAB Online, then you can also use MATLAB Drive https://www.mathworks.com/products/matlab-drive.html to transfer files you have downloaded to your desktop, over to MATLAB Online.

Answer 3

[Dr. Alka Tomar]

Thanks for the reply. I am constantly posting on their site as well, noone is replying. Hence I came here.

Anyway, you are right, else it would work.

Only I dont know how to then proceed ahead in that course.

Thank you very much again.

[Dr. Alka Tomar]

Thank you for the reply.

[Walter Roberson]

Is it https://www.edx.org/course/quantitative-methods-for-biology ?