unsupported tiff format

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I have a folder of tifs that were recovered from an sd card out of a Canon 7D.  The only recovery software that worked saved them as Tif files.  I can view the thumbnail but not the picture itself and the files cannot be opened by  Photoshop CC or camera raw  They all spit out a message to the tune of "unsupported tiff format" or 
"Could not complete your request because the TIFF file uses an unsupported compression method" Please help I have over 1000 pics stuck!!!!

This is the format of the files I have: CANKN_Cankn EKS 7@_28472-74877_000.TIF
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Edith Kindrachuk

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Posted 1 year ago

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Johan Elzenga, Champion

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A Canon EOS camera cannot shoot in TIFF format, so whatever these images are, they are not TIFF. Change the file extension to '.CR2' if the images were shot in RAW format, or change it to '.JPG' if you shot in jpeg format.
(Edited)
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Benjamin Golinvaux

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If you are lost, post a link to one of these files. We'll try to help you find a way to open them.
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Edith Kindrachuk

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Hi Benjamin I just posted a link. Hope you can help. Thank you
https://www.dropbox.com/s/uyp3f4ngkwoe01y/CANKN_Cankn%20EKS%207%40_86072-240061_001.TIF?dl=0
(Edited)
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aaron dougherty

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It's not a fix for CC, but you might have better luck with Canon's DPP.  I really prefer their Raw converter anyway, it gives a more "three-dimensional" rendering.....
(Edited)
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PATRICK CRAIG

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When I am unable to open a file I use the free UrfanView and save to wherever I want.
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Edith Kindrachuk

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https://www.dropbox.com/s/uyp3f4ngkwoe01y/CANKN_Cankn%20EKS%207%40_86072-240061_001.TIF?dl=0
I submitted a link to one of the pictures. Thanks for your help
(Edited)
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Johan Elzenga, Champion

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The file is 75 MB. That means it's neither a raw file nor a jpeg. It's far too big for that. Maybe somebody can open it and extract a useful image, but I wouldn't hold my breath.
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Benjamin Golinvaux

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It doesn't look good. It is indeed some kind of tiff file (header starts with "II" (0x49 0x49)) and are NOT cr2 or crw files (the tag is missing from the file header). IrfanView correctly opens the TIFF file, and displays it as a plain white image. Its contents look corrupted, because here is what IrfanView says about the file (see picture below)

Obviously some fields are incorrect (I assume you do not shoot in black & white :) ). Also, the resolution mentioned matches none of the Canon 7D image sizes, whatever the settings.

Two possibilities at this point :
1)  either your SD card recovery software tried to be smart : it found CR2 files, assumed they were TIFF files (they indeed are, but very special ones) and tried to somehow "repair" them. Hence the IrfanView result above

---> ACTION : could you please try another recovery software ? In order to help me pick you one, could you please tell me why the card was unreadable ? Did you DELETE the images by mistake, or did you FORMAT the card by mistake ?  This will have an impact on the best program for the job. Third option : if it simply became corrupted due to an unknown reason, please tell me so.

2) either the file are really CR2 files with a variant I did not recognize from the header (maybe M-RAW or S-RAW files...). Anyway, they are probably corrupted, too, because my version of Camera Raw is up to date and should be able to open 7D files. 

--> ACTION : can you please try to use your Canon software to open the files ? I'm an Oly shooter and I am not familiar with the Canon software suite, but there must be some kind of RAW file converter/viewer. Have you tried opening your file in these ?

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Benjamin Golinvaux

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Wow. I missed the part about the file size :)   That was obvious ;p  Sometimes I am too geeky and forget to check for the basic stuff.   Definitely some kind of misdoing from your recovery software.

Edith, please give this program a try : 

https://www.stellarinfo.com/europe/photo/sd-card-recovery/?gclid=CJfApMnHtdQCFQMcGwod2PIJEw

(I'm in Belgium so the link might be broken from your end, but the program to look for is Stellar Phoenix Photo Recovery..... what a cheesy name)
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Edith Kindrachuk

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Hi Benjamin,  I have tried with another recovery tool and this is a sample of the new files I got? I still can't open them but getting another message for the jpg file ( Could not complete your request because an invalid JPEG DQT quantizer value is found) I am so distress as most my pictures seem to be corrupted from my recent trip ti Thailand and Laos. Hope you can see something. I did nothing specific with the cards. I was uploading the photos from the card reader and it suddenly stopped and was displaying blank folder. I tried with the second card (same brand-Scandisk-) and the same thing occurred. All other cards from a different brand are fine
https://www.dropbox.com/s/9c494jt5ln2j6oh/File002.jpg?dl=0
https://www.dropbox.com/s/sxzsbio00a877s7/File002.tif?dl=0

Thank you very much for your help
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Benjamin Golinvaux

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Hello Edith. The file sizes are, again, not correct. 

Could you please try to create an image of your SD card so that maybe I can try to recover the individual files ? It might be a big file so I'd suggest you use a service like wetransfer to send it.

The program that lets you create a raw low-level copy of your SD card is there : http://hddguru.com/software/HDD-Raw-Copy-Tool/

Are these results achieved with the app I suggested for recovery (Phoenix) ?

Best
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Benjamin Golinvaux

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And, BTW, can you remember which mode your 7D was in? RAW ? RAW+fine jpeg? RAW+ medium jpeg?  etc...
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Benjamin Golinvaux

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Needless to say, do not try to repair your card by modifying its contents. Just try to extract files from it while leaving it untouched. If succeed in creating an image of the broken card, just let me know.

And your JPEG files suffer from the same problem as the first attempt : the recovery program incorrectly assumed their type and produced garbage.

Another question : during the first attempt, when you got files that were invalid but where the previews were OK, were there enough of them with correct previews ? Or were many photos missing ?

Thanks 
(Edited)
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Benjamin Golinvaux

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A pro photograph I discussed with told me that Wondershare photo recovery was, for him, the most reliable app available : https://datarecovery.wondershare.com/data-recovery/photo-recovery.html