JpegDigger is a JPEG carver. As such you may not expect it to be useful to recover RAW photos. However I have been able to put it to good use in a number of cases where: RAW photos were lost or deleted Photos appear corrupt on memory card RAW photos were corrupt after recovery JpegDigger… Read More »
When you discover photos on your SD card are corrupt you should: Do as little as possible (read: nothing) with the card. Do NOT run chkdsk on the card itself! Create a disk image of the card immediately! There are free and paid ways to try to recover or repair your photos. So I’ll be… Read More »
Unfortunately it is a common problem that you are unable to open recovered photos after using file recovery, undelete or photo recovery software on a SD card. In this post I will make some assumptions: Photos are on a memory card and therefor: File system is a variation of FAT (FAT32, exFAT) File type is… Read More »
There’s basically three things that can be wrong if a JPEG opens but is partially grey:
1. File is too small. Let’s an average JPEG shot with same camera and settings is 4 MB and the ones that are damaged are like 1 MB or 2 MB. Then probably half the data is simply missing. These files can not be repaired.
2. Normal file size. Either part of the file does not contain image data or file does contain image data but is interrupted by some invalid data.
If part of the file does not contain image data then this is sometimes easy to spot using a hex editor. All of a sudden ‘random’ binary data stops and changes to FF FF FF or 00 00 00 etc.. Repair: Impossible.
In case the data is however is there but it is interrupted repair is often possible. JPG-Repair tries to detect and will try to get rid of the invalid data, however this does not always work. Current version detects invalid JPEG markers, common damage due to bad sectors and some type of corruption I observed a few times with images shot with certain Samsung phones.
Can corrupt Canon CR2 RAW photos be repaired? Edit 2nd of March, 2019: After having successfully repaired a number of corrupted CR2 (Canon RAW files) rather than having JPEGs extracted, I now accept CR2 files for my photo repair service. Unfortunately I know of no software that can successfully repair corrupt Canon CR2 RAW Canon… Read More »
Raymond.cc’s JPEG repair challenge If you have googled for software to repair corrupt JPEG photos, then there’s a good chance you have come across this article on Raymond.cc: 5 Tools to Repair Corrupted JPEG Photos and Images. Raymond, or the article author HAL9000 (utterly cool nick!) set up an artificial test to test various tools that… Read More »
Recover Canon CR2 RAW photos. Canon CR2 raw files contain unprocessed raw sensor data. Depending on the camera’s resolution they tend to be quite large and due to typical usage patterns (preview photo > dismiss/delete file > shoot new file etc.) the files become easily fragmented. Shoot video too? Then fragmentation is very likely to… Read More »
Creating an image file for the purpose of data recovery An image file of a disk for the purpose of data recovery is one that captures each and every sector from the source medium. Used and unused. It is also referred to a bit-stream image, a sector-by-sector disk copy or a raw image. Creating an… Read More »
I recently did a MP4 video recovery from a memory card (SD). It contained combined JPEG photo and MP4 video data, shot with a Canon EOS 600 D. Previous recovery attempts done by the customer resulted in the majority of the files being corrupt. All MP4 video was unplayable. Most recovered MP4 videos were tiny… Read More »
Comparison between various tools for photo recovery The case of the corrupt JPEG files Sometimes it turns out photos can not be repaired after recovery. Best thing to do then is to use better photo recovery software and recover the files again. Files were originally recovered using Easeus Data Recovery. Case: Contacted via Facebook Chat,… Read More »