Comments on: The Story Behind the MATLAB Default Image

By: Steve

Steve — Tue, 06 Oct 2009 11:17:33 +0000

Opcs—Possibly you mean the image peppers.png? Try this:

>> which peppers.png
C:\Program Files\MATLAB\R2009b\toolbox\images\imdemos\peppers.png

By: opcs

opcs — Tue, 06 Oct 2009 06:22:13 +0000

when i execute the codes in matlab
x=imread(’pepper.tif’), it takes image from some directory and can display it using show command.

can u lightup, from which directory the image belongs to, i think it is bydefault images that is inbuilt in matlab, but where it has been stored ?

By: Steve

Steve — Tue, 22 May 2007 13:13:20 +0000

Farhad - Sorry … I don’t know the story about that.

By: Farhad Aslani

Farhad Aslani — Tue, 22 May 2007 11:59:29 +0000

Hi Steve!

It was very interesting. Thank you for all that.
But I beleive that the story is not complete yet ;)
If you use simulink, you can “mask subsysteme”, with
image, and the default image you get there is complete different.
I hope there is an interesting story about that as well??

Farhad

By: Steve

Steve — Fri, 16 Feb 2007 13:04:52 +0000

Rob - Beyond skimming the occasional paper on the topic, I’ve never really looked seriously at steganography methods. There are a couple of submissions on the MATLAB Central File Exchange that you might want to look at.

I don’t know of a graphic file format that would hold everything. A few, like TIFF, can store 32-bit ints or floats, but that wouldn’t do it.

By: Rob

Rob — Fri, 09 Feb 2007 02:52:01 +0000

Steve,

Great stuff!

I’m glad you won - among other things, embedding all the layered info into the default image is a great instructional example. It also leads to thoughts of steganography… Is that in your area of interest?

Question: is there a graphic file format that would preserve the bit-depth that you used in the Matlab default image? I can’t think of anything off the bat since they all seem to use integers.

-Rob

By: Rick Spada

Rick Spada — Fri, 27 Oct 2006 01:02:10 +0000

For what it’s worth, the other person that Steve bid against was me, and my dog’s name was Pepper. Fortunately, I had my wife next to me during the bidding, and had I won, there would have been a lot less explaining to do :-)

– Rick Spada

By: Steve

Steve — Mon, 23 Oct 2006 14:50:36 +0000

Kathirvel - watch for a post about this question later this week.

By: Steve

Steve — Sun, 22 Oct 2006 23:34:35 +0000

Wes - the only thing I know about the cameraman image is that it is owned by MIT. We have permission from them to use it in examples and demos for our products.

By: Wes

Wes — Sun, 22 Oct 2006 23:19:29 +0000

Interesting. I’d always wondered what the story was with that ghostly image that I’ve seen from time to time when I passed image some bad parameters.

I’m also curious: what is the history of the cameraman image? Quick web searches don’t seem to turn up anything both relevant and informative.