image recovery cr2 files

Started Jun 10, 2010 | Discussions
rd52
rd52 Contributing Member • Posts: 577
image recovery cr2 files

I was wondering if there is a free recovery program for cr2 files that recovers them as cr2 files and not tiff. Every one I've tried recovers them as tiff. Thanks.
rick

Jim Cockfield Forum Pro • Posts: 16,340
Try Photorec (free)

Try Photorec (free). I've used it to recover .cr2 files from a friend's card before and it worked. But, the exact camera model creating the files can also come into the equation (not all .cr2 files are the same).

If for any reason you get files named as .tiff, try renaming them to .cr2 instead, then see if your raw converter of choice can open them.

You'll see a download menu choice on the left side of the main page. Then, just click on the desired operating system (DOS, Windows, Linux, OS X, etc.) to download it.

http://www.cgsecurity.org/wiki/PhotoRec

Use a card reader if possible, and select your memory card from the list of media it finds (hard drives, memory cards, etc.), and give it a place to save the photos to on your hard disk when you are asked Where to Save Recovered Files (or use the defaults and it will create folders for them).

Note that this product may not retain the original file names with a damaged file system (but, you may not care about that), since it ignores the file allocation table entirely and goes after the underlying data (i.e., your image files). Note that when you get to the partition selection screen, sometimes it's best to select "Whole disk".

In most cases you don't need to worry about changing any of the other options. Simply leave everything at the defaults (Partition type of Intel, file types to recover, etc.) and it will try to recover any files that haven't been overwritten yet (and don't try to do anything like take more photos or you may overwrite some of them).

Note that by default, Photorec will only recover files that are contiguous and uncorrupted. However, if you're not recovering all of your photos using defaults, you can change some of the settings to alter this behavior if desired.

For example, if you look for the "Paranoid" settings when using photorec, you'll see three choices for it. Try it using Yes with Brute Force On (the default is Yes with Brute Force off) to get more images. It will take longer for it to run that way, but you'd have a higher chance of recovering uncorrupted images (since it's using relatively sophisticated techniques to try and piece together parts of images that are located in more than one place on the media). That option (Paranoid: Brute Force On) will still filter any corrupted files.

http://www.cgsecurity.org/wiki/PhotoRec_Step_By_Step#PhotoRec_options

If you still don't get any additional images that way, you can set Photorec to keep corrupted files.

Here's a page showing you how to use this software:

http://www.cgsecurity.org/wiki/PhotoRec_Step_By_Step

There are some other free programs around that do a pretty good job in most cases, too. Here's one example, and it also has a nice Graphical User Interface. I usually prefer photorec. But, if you're not comfortable with a text based interface, you may want to try this one first instead. But, note that it may not work correctly with newer Versions of Windows.

http://www.pcinspector.de/SmartRecovery/info.htm?language=1

For more choices (including some commercial versus free products), see this page:

Software - Image Recovery and Utilities

After you recover your images (and make sure you can see the larger images, not just the thumbnails), I'd make sure you format the card again before using it, using the camera's menu choice for format (not your PC).

I do that every time I reuse a card (format it again using the camera's menu choice for format). That way, the card always starts out with a fresh FAT (File Allocation Table), just the way the camera expects it, since the camera is performing the format.
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Jim Cockfield Forum Pro • Posts: 16,340
Re: Try Photorec (free)

Jim Cockfield wrote:
...

If for any reason you get files named as .tiff, try renaming them to .cr2 instead, then see if your raw converter of choice can open them.

You may want to try that with some of the files you've already recovered using other programs. Just rename them to .cr2 files and see if they open OK or not. The internal structure is close enough that the recovery programs are probably just naming them incorrectly, because they can't tell the difference.

But, as long as the files are intact and have the correct number of bytes, then they may open just fine if you rename them.

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rd52
OP rd52 Contributing Member • Posts: 577
thanks, it saves as cr2's

thanks, I tried it, and it worked for the cr2 files from my xti. It was able to recover them as cr2 files. I really didn't need it right now, but I like to have a program just in case. I've had to use recovery software in the past and every time it saved them as tiff's. Thanks for the heads up.
rick d

Jim Cockfield Forum Pro • Posts: 16,340
Re: thanks, it saves as cr2's

Great, glad to hear it.

It's my program of choice for image recovery.

I'd suggest sending a note of thanks to Christopher Grenier (the developer) for his hard work on making sure this software works with as many file types as possible (and providing it free for others to use); and/or sending a small donation to help with offsetting his time and hosting costs:

http://www.cgsecurity.org/wiki/Donation

You'll see his e-mail address on this page:

http://www.cgsecurity.org/wiki/Support

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