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Old 08-08-2007   #3 (permalink)
Greg


 
 

Re: Editing Jpeg (JFIF) headers

Thanks. Not sure I can be bothered working that all out, and I don't have a
hex editor. Interesting site, but a bit out of date - hasn't been updated
for ten years and most of the links are broken. Rather nostalgic - even has
info on the good Amiga IFF (sigh).


"Adam Albright" <AA@ABC.net> wrote in message
news:ipaib356is03qb2fp3v0mlv3vq6f9f4jug@4ax.com...
> On Wed, 8 Aug 2007 11:44:10 +1000, "Greg" <greg.munro@bigpond.com>
> wrote:
>
>>Recently Vista networking/filehandling/PhotoGallery corrupted some of my
>>jpg
>>files by trashing the jpg markers.
>>
>>Does anyone know whether it is possible to use a text editor to replace
>>the
>>headers with an intact JFIF header from an uncorrupted file so that
>>software
>>can recognise it as a jpg again? Or is each header so integral to that
>>particular image (in terms of defining size, etc) that you can't do that?
>>And if it is possible, where do the Jpg headers start and end? I don't
>>read
>>hexadecimal! (Or whatever that spaghetti is)
>>
>>There doesn't seem to exist yet any recovery software that works for Vista
>>that can recover my files.

>
> You're getting into the tall grass and probably at minimum need a hex
> editor. There's more involved than simply substitution. If you want to
> give it a shot this may help:
>
> http://www.martinreddy.net/gfx/index-hi.html
>
> Follow to the JPEG link under 2D bitmaps then also check out the FAQ
> and tools section.
>


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