JPG-Repair Toolkit allows you to recover data from corrupted CR2 photos (JPEG). Canon RAW photos (CR2) contain the raw, ‘undeveloped’ sensor data. JPG-Repair Toolkit can process multiple Canon RAW files (Cr2) files in batch.
High resolution, full frame JPEG from a corrupted CR2 photo.
Commonly Canon RAW photos embed one or more JPEGs: a low resolution thumbnail, a medium resolution preview, and in many cases a full frame preview. I have seen CR2 photos were a full frame JPEG was embedded even though the camera was set to shoot at a lower resolution! Using JPG-Repair Toolkit you can extract the full frame preview.
Technically JPG-Repair Toolkit does not repair CR2 photos, it extracts JPEGs already embedded! Of course having undeveloped and unprocessed RAW data is probably preferable, the full frame JPEG is hardly worthless. If the RAW itself is absolutely necessary, please submit one or two corrupted + an intact CR2 shot with the same camera and settings as I am some times able to repair these manually.
How to recover data from corrupted CR2 photos using JPG-Repair Toolkit
Time needed: 1 minute, assuming you have downloaded JPG-Repair Toolkit.
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Steps to extract JPEGs from corrupted CR2 photos:
For RAW files select a minimum resolution, probably > 1.9 (MP) to skip lower resolution thumbnails and medium sized previews. Many RAW photo formats contain a full frame JPEG. If this setting is set to a too low value, JPG-Repair may simply extract the medium sized preview. If too high it will skip every JPEG it comes across. JPG-Repair will get to work and save files using the following format: OriginalName-1.JPG. For each file it is able to repair it will show a preview and certain details such as resolution. Note that the free version only saves scaled down BMP images!
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Acknowledgements:
To determine signatures I examined RAW files taken from: http://www.rawsamples.ch/index.php/en/canon.
And also: https://www.wesaturate.com/.