Champ Image Lab

Offline image editor • Remove BG/FG • Magic remove • Repair deleted areas • Outline • Detect box
Preview No image
Click edited image = Magic / Detect
Original
Edited (PNG transparency supported)
New: Use Repair tools to replace deleted transparent areas: Restore from Original, Heal Smart Fill, or Fill Transparent.
Tools
Tip: Colorize → Auto-Contrast
tol 40
tol 30
tol 22
Detect Box draws a rectangle; Magic removes pixels (alpha=0).
• Restore copies pixels from Original only where alpha=0
• Heal fills holes using nearby pixels (multi-pass)
• Fill paints remaining transparent pixels with a color
Made for Programmer’s Picnic • Runs offline • Files never leave your device.
Champ Image Lab — Detailed Help
Offline editing, background removal, magic remove, repair, outline, and export.

1) Start

  • Open Image → choose a file from device.
  • Or click Paste and use Ctrl+V to paste an image from clipboard.
  • You’ll see Original (left) and Edited (right).
Tip: Work on the Edited image. Original is kept as a reference + for repairs.

2) Undo / Redo

  • Undo reverses your last step.
  • Redo re-applies an undone step.
  • Keyboard: Ctrl+Z undo • Ctrl+Y redo

3) Background / Foreground Removal

  • Remove BG: pick a color and set tolerance. Best for flat/studio backgrounds.
  • Remove FG: remove a solid-colored object/ink from the image.
  • Swap (BG↔FG): flips what is transparent vs visible (quick mask trick).
If too much is removed: lower tolerance. If too little: increase tolerance.

4) Magic Remove vs Detect Box

  • Magic Mode: click on the Edited image to remove a connected region of similar pixels (alpha becomes 0).
  • Detect Box Mode: click on the subject → draws a bounding box (offline region detection).
  • Use the tol slider to control sensitivity.

5) Repair Deleted Areas (NEW)

  • Restore from Original: brings back pixels only where alpha=0 (deleted parts).
  • Heal (Smart Fill): fills transparent holes using nearby pixels (good for small holes / dust).
  • Fill Transparent: fills remaining transparent pixels with chosen color.
Best workflow: Magic Remove → Repair (Restore/Heal) → Fine tune (Fill if needed) → Download PNG.

6) Outline / Poster Effects

  • Outline: edges on transparent background (good overlay).
  • Outline B/W: black lines on white background (sketch look).
  • Colorize: smart tint (not true AI color restoration).

7) Export

  • Download PNG exports the Edited image with transparency preserved.
  • If you want a solid background, use Fill Transparent before download.

Troubleshooting

  • Canvas looks blank? Open an image first.
  • Magic remove removes too much: lower tol, click closer to the target region.
  • Heal is slow on big images: resize to 1080/720 first, then heal.