JPEG-Repair 2.8.249 updates

Drag & drop in file browser.

The file browser is archaic and I know it. At the same time it’s quite intertwined with JPEG-Repair functionality which makes it difficult to ditch it and replace it by default Windows file open and save dialogs. I myself am probably the most frequent user of JPEG-Repair and it bothered me too, specially when I had to browse to deeply nested folders for the corrupted photos.

To make life somewhat easier you can not grab a file or folder from the deeply nested folder and drop it onto the directory box of the JPEG-Repair file browse dialog. This will automatically select the folder which you dropped.

Bitmap Viewer

With analysis tools that JPEG-Repair offered until now, it was still possible to have a JPEG like entropy and a JPEG like byte histogram while the corrupt file does not contain JPEG data, and thus can’t be repaired. With the Bitmap Viewer we add useful tools for corrupt file diagnostics:

Bitmap View:

Allows you to see data (and thus distinguish with non data areas). But also quickly reveals patterns of repeating data for example.

JPEG Analysis shows presence of typical JPEG vs non-JPEG byte patterns: Virtually all pixels are blue, this is 100% JPEG data.

Examples of non JPEG data: Total absence of blue pixels while the red pixels suggest data patterns that should not occur in JPEG data by definition .. The screenshot show total absence of JPEG data.

Same block of data: The lower 5/8th of the image shows too much structure. It’s too structured to be JPEG data.

You’ll be able to tell if it’s worth investing time into a file or not. Remember, to repair JPEGs or to extract JPEG data from whatever file, the file needs to contain JPEG image data.