JPEG Medic // Accurate Manual JPEG Recovery
Table of Contents
  1. Overview
  2. Theory of JPEG Repair
    1. JPEG structure
    2. How to fix broken JPEG file
  3. Working with the Program
    1. Main menu
    2. Virtual folder tree
    3. Files panel
    4. Preview panel
    5. Cluster view
    6. Hex view
  4. Repairing JPEG image
    1. Opening JPEG file
    2. Repair window
      1. Menu commands
    3. Repair procedure
      1. Visual analysis and localization of damaged MCUs
      2. Finding the next correct MCU
      3. Deleting damaged MCUs
      4. Inserting empty MCUs
      5. Color correction
        1. Automatic color correction
        2. Manual color correction
      6. Filling empty MCUs with data
        1. Use the thumbnail image to fill the empty MCUs
        2. Auto-generate missing content
    4. Saving repaired JPEG image
    5. Repairing fragmented JPEG file
    6. Repairing damaged JPEG image based on SOS marker
    7. Repairing JPEG file encoded by ransomware

Manual color correction

Manual color correction is done by manually adjusting each color channel individually. Use the sliders in the Repair window to change each individual color channel.

color correction

By moving a slider, you should attempt to eliminate any differences in colors between the MCUs in the original part of the image and recovered MCUs.

Sometimes you may prefer to adjust color channels individually, that is visually estimate changes in each individual color channel. To do this, turn on the corresponding channel in the Image > Channels menu. This makes the Preview area grayscale, and the grayscale tone is calculated based on the value of the selected color channel. To switch back to the full color mode, use the Image > Channels > YCbCr menu command.

color channel

The Auto select option in the Image > Channels menu allows you to switch to individual color channel display automatically every time you start moving the corresponding slider. Whenever the control focus switches to any other part of the window, the image changes back to full color display.