Hiding Glyph: Bytewise Image Steganography

Miscellaneous programs and scripts, opensource or not, and sometimes, random mathematical stuff.

Re: Hiding Glyph: Bytewise Image Steganography

Postby zavvlon » Tue Apr 13, 2010 1:21 am

Yes I know that 1ko= 1000 Octets and I did not understand at all the way to compute the amount of space free, so I'll simply stick with the process I used so far, hide an empty text file in the picture which I want to know the space it has and then rename the image with the amount of Bytes given.

Also I am not a computer genius but I believe that to instal imagemagik I simply have to follow the onscreen directions so I'm fairly sure it's installed properly,

and I am taking the tip you give in the "readme" file, (Yes I read it completely) And am trying a PNG file.

I have taken a screenshot but I'm not quite sure of how to post the picture...
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Re: Hiding Glyph: Bytewise Image Steganography

Postby Gamall » Tue Apr 13, 2010 2:08 am

zavvlon wrote: I did not understand at all the way to compute the amount of space free, so I'll simply stick with the process I used so far, hide an empty text file in the picture which I want to know the space it has and then rename the image with the amount of Bytes given.


The program does exactly the computation which I have described to give you that number -- a simple multiplication. It's not the end of the world, is it ? And again, as it is before compression (see my edit in previous post) the actual capacity of an image is generally much higher than this computation indicates.

zavvlon wrote:Also I am not a computer genius but I believe that to instal imagemagik I simply have to follow the onscreen directions so I'm fairly sure it's installed properly,


I have tested the latest version of IM and it works perfectly.

There is a simple way to test your installation:
Code: Select all
convert logo: logo.gif
imdisplay logo.gif

type this in the MSDOS command prompt (I assume you are using Windows). If you don't see the image of a wizard appear on your screen, then the install is broken.


zavvlon wrote:"readme" file, (Yes I read it completely)

Good boy. :ouioui

edit:
zavvlon wrote:I have taken a screenshot but I'm not quite sure of how to post the picture...


Upload attachment tab, below the text of your post.

(note: high time to go to bed in this part of the world...)
Last edited by Gamall on Tue Apr 13, 2010 2:09 am, edited 2 times in total.
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Re: Hiding Glyph: Bytewise Image Steganography

Postby zavvlon » Tue Apr 13, 2010 2:17 am

Okay goodnight I'll wait untill tomorrow to post again
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