Re: [Gimp-user] Forensic analysis using gimp

2007-09-20 Thread Raphaël Quinet
On Thu, 20 Sep 2007 06:22:14 -0600, Alex Feldman <[EMAIL PROTECTED]> wrote: > This is getting off the topic of the Gimp, but you've piqued my > interest. I just took a digital photo and modified it very slightly > with the Gimp, and used exiftool to print out the exif data for the > original and t

Re: [Gimp-user] Forensic analysis using gimp

2007-09-20 Thread Alchemie foto\\grafiche
Rafael i'm almost sure you will win, i was a expert of traditional photo collage and manipulation (as in darkroom ) and at that time, if i wished i could bypass most of detection method But time pass by...Now i do photo collage with computer but for only artistic purpose and so i never had reas

Re: [Gimp-user] Forensic analysis using gimp

2007-09-20 Thread Alex Feldman
This is getting off the topic of the Gimp, but you've piqued my interest. I just took a digital photo and modified it very slightly with the Gimp, and used exiftool to print out the exif data for the original and the modification, and diff'd the two exif outputs. The only things I saw that might

Re: [Gimp-user] Forensic analysis using gimp

2007-09-20 Thread Raphaël Quinet
On Thu, 20 Sep 2007 05:23:13 +0200 (CEST), "Alchemie foto\\grafiche" <[EMAIL PROTECTED]> wrote: > Raphael Quinet wrote > _" I do not > want to say too much about that because I do not want to give too many > ideas to the crooks, but let's say that the way some things are split > or ordered in the

Re: [Gimp-user] Forensic analysis using gimp

2007-09-19 Thread Alchemie foto\\grafiche
Raphael Quinet wrote _" I do not want to say too much about that because I do not want to give too many ideas to the crooks, but let's say that the way some things are split or ordered in the JPEG file is usually different between digital cameras and image editing software."_ Well i too don't wan

Re: [Gimp-user] Forensic analysis using gimp

2007-09-19 Thread Raphaël Quinet
On Sun, 16 Sep 2007 10:56:53 -0300, "Lucas Prado Melo" <[EMAIL PROTECTED]> wrote: > How can I identify (using gimp) if a photograph has been faked? > There are different techniques that can be applied. Some of the focus on detecting if the image has been modified (detecting suspicious patterns

Re: [Gimp-user] Forensic analysis using gimp

2007-09-18 Thread Rikard Johnels
On Sunday 16 September 2007 15:56, Lucas Prado Melo wrote: > How can I identify (using gimp) if a photograph has been faked? > > []'s > ___ > Gimp-user mailing list > Gimp-user@lists.XCF.Berkeley.EDU > https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-

Re: [Gimp-user] Forensic analysis using gimp

2007-09-18 Thread Simon Budig
Anthony Ettinger ([EMAIL PROTECTED]) wrote: > > Lucas Prado Melo wrote: > > > How can I identify (using gimp) if a photograph has been faked? [...] > I would be interested in learning more about high-level techniques for > analysis as well. > If anyone finds a resource. At the last chaos communica

Re: [Gimp-user] Forensic analysis using gimp

2007-09-18 Thread Anthony Ettinger
On 9/18/07, Kevin Cozens <[EMAIL PROTECTED]> wrote: > Lucas Prado Melo wrote: > > How can I identify (using gimp) if a photograph has been faked? > > It would depend on how good a job was done in faking the image. The basics > involve using a high zoom factor to see the pixels. Look for artifacts c

Re: [Gimp-user] Forensic analysis using gimp

2007-09-18 Thread Kevin Cozens
Lucas Prado Melo wrote: > How can I identify (using gimp) if a photograph has been faked? It would depend on how good a job was done in faking the image. The basics involve using a high zoom factor to see the pixels. Look for artifacts created by a poor blend of the added in (faked) part of the

Re: [Gimp-user] Forensic analysis using gimp

2007-09-16 Thread Alex Feldman
Well, yes if they did a very bad job of it, like saving the photo with all the additional layers intact. > How can I identify (using gimp) if a photograph has been faked? > > []'s > ___ > Gimp-user mailing list > Gimp-user@lists.XCF.Berkeley.EDU > https

[Gimp-user] Forensic analysis using gimp

2007-09-16 Thread Lucas Prado Melo
How can I identify (using gimp) if a photograph has been faked? []'s ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user