question in topic mah.Originally posted by eagle:this question hor, should be asked to ndmmsmallant
I didn't take any modules in image processing techniques
Finally, I don't see any question except "any ideas?"
hmmz, so is look at the coding of the pdf to find out arh?Originally posted by ndmmxiaomayi:Not too sure how to tell.. but as far as I know, any file that is converted to PDF is most likely intact... that means there's no change in colours or whatever. Unless it has been purposely converted to greyscale...
That will need an image processing program to find out if it has been edited before.
US do this a lot... I can't find the Blackhat presentation on it.
Probably not directly as a PDF file. The image will need to be extracted out. If it's greyscale, in a hex editor, it's nearly all 0 or Fs. Grey is derived from black... so as it goes lighter, Fs are added.Originally posted by hisoka:hmmz, so is look at the coding of the pdf to find out arh?
any ideas if say given an image find out if grayscale or colour?
hmmz okz, thx.Originally posted by ndmmxiaomayi:Probably not directly as a PDF file. The image will need to be extracted out. If it's greyscale, in a hex editor, it's nearly all 0 or Fs. Grey is derived from black... so as it goes lighter, Fs are added.
A hex editor will help.
CID > Tech DepartmentOriginally posted by hisoka:hmmz okz, thx.
any others? me abit blur haha