jpegrepair

by Don Mahurin, 2017-12-22

Do you have JPEG images that have corrupt or missing blocks?

JPEG repair may be able to help

jpegrepair

JPEG Repair can fix images at the block level, using the following operations:

• Change color components: Y,Cb,Cr
• Insert blocks
• Delete blocks
• Copy relative blocks

Build

make

Usage

jpegrepair infile OP ...

where OP is: cdelta dest insert delete copy

Examples

Increase luminance.

jpegrepair dark.jpg light.jpg cdelta 0 100

Fix blueish image.

jpegrepair blueish.jpg fixed.jpg cdelta 1 -100

Insert 2 blocks at position 50:5

jpegrepair before.jpg after.jpg dest 50 5 insert 2

Delete 1 block at position 63:54, and after that, correct luminance. Delete 1 block at position 112:0

jpegrepair corrupt.jpg fixed.jpg dest 63 54 delete 1 cdelta 0 -450 dest 112 0 delete 1

Copy to position 9:35 2x2 blocks from relative block 1:-20 (1 row forward, 20 columns back).

jpegprepair before.jpg after.jpg dest 9 35 2 2 copy 1 -20