In article <bk4804l1cn6f512vqtgeb8l4jpal74tnjg@[EMAIL PROTECTED]
>,
Joel <Joel@[EMAIL PROTECTED]
> wrote:
> krishnananda <k@[EMAIL PROTECTED]
> wrote:
>
> > In article <UkNMj.6273$bx3.2606@[EMAIL PROTECTED]
>, "Ron" <Hairdad@[EMAIL PROTECTED]
>
> > wrote:
> >
> > > I have changed the file association to different viewers, tried
opening
> > > in
> > > IE7 tried changing the extension, and tried opening on a different
> > > computer. all 30 files have no header, and can't be opened. I gave
my son
> > > a
> > > god photo, and he extracted the header, and put it in a bad file,
but all
> > > he
> > > got was garbage. Deleted the entire folder and replaced with a copy
> > > saved
> > > to disk, but have no idea what happened.
> >
> > Try downloading Image Magick for Windows from:
> >
> > <http://www.imagemagick.org/script/binary-releases.php#windows>
> >
> > It is a very powerful graphic file manipulation program. And it's
free.
> >
> > If you have access to a Mac there is a fantastic utility called
> > CanOpener. It can open any file, even if all you get is a raw hex
dump.
> >
> > There is also a utility called Graphic Converter. I have less personal
> > experience with this one, but it can convert between many different
> > graphic file formats.
> >
> > Good luck!
>
> Hope you won't mind me using your message to pass more info to the OP
(I
> don't like top posting so I don't have the original message).
>
> As I have suggested in the first response to try with Graphic *VIEWER*
> instead of Graphic Editor, because there is some differences between
them.
> Same with IE which isn't neither Viewer nor Editor but a browser just
happen
> to be able to display few formats. More detail
>
> - Most if not all VIEWERS should be able to display (open) just about
ALL
> extentions, and they won't mind if the extension been changed from one
to
> other.
>
> - Most if not all EDITOR won't open the graphic file with *wrong*
extension,
> because they don't treat all formats the same, and they open to Edit
*not*
> just for Displaying.
>
Yes, but: ImageMagic and other well-written graphics file editors pay no
attention to the file's name or extension. They read the file's header
to see what the file is supposed to contain. For example, a tiff with an
8-bit preview, LZW compression, and Macintosh (PPC) byte order is very
different from a tiff with a 1-bit preview, no compression, and PC byte
order. If you have files a.tif and b.tif you can extract that header
info and see whether the file's contents match the header information,
without doing any destructive editing. File extensions _should be_ only
for the convenience of the OS's GUI. Unfortunately, lazy programmers
take them as gospel.
--k
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