imagemagick
# ImageMagick Moltbot Skill
What this skill does
# ImageMagick Moltbot Skill
Comprehensive ImageMagick operations for image manipulation in Moltbot.
## Installation
**macOS:**
```bash
brew install imagemagick
```
**Linux:**
```bash
sudo apt install imagemagick # Debian/Ubuntu
sudo dnf install ImageMagick # Fedora
```
**Verify:**
```bash
convert --version
```
## Available Operations
### 1. Remove Background (white/solid color → transparent)
```bash
./scripts/remove-bg.sh input.png output.png [tolerance] [color]
```
| Parameter | Default | Range | Description |
|-----------|---------|-------|-------------|
| input.png | — | — | Source image |
| output.png | — | — | Output transparent PNG |
| tolerance | 20 | 0-255 | Color matching fuzz factor |
| color | #FFFFFF | hex | Color to remove |
**Examples:**
```bash
./scripts/remove-bg.sh icon.png icon-clean.png # default white
./scripts/remove-bg.sh icon.png icon-clean.png 30 # loose tolerance
./scripts/remove-bg.sh icon.png icon-clean.png 10 "#000000" # remove black
```
### 2. Resize Image
```bash
convert input.png -resize 256x256 output.png
```
### 3. Convert Format
```bash
convert input.png output.webp # PNG → WebP
convert input.jpg output.png # JPG → PNG
convert input.png -quality 80 output.jpg # Compress
```
### 4. Rounded Corners (iOS style)
```bash
convert input.png -alpha set -virtual pixel transparent \
-distort viewport 512x512+0+0 \
-channel A -blur 0x10 -threshold 50% \
output-rounded.png
```
### 5. Add Watermark
```bash
convert base.png watermark.png -gravity southeast -composite output.png
```
### 6. Batch Thumbnail Generation
```bash
for f in *.png; do convert "$f" -resize 128x128 "thumbs/$f"; done
```
### 7. Color Adjustments
```bash
convert input.png -brightness-contrast 10x0 output.png # brighter
convert input.png -grayscale output.png # grayscale
convert input.png -modulate 100,150,100 output.png # more saturation
```
## Common Patterns
### Flat Icon → Transparent Background
```bash
./scripts/remove-bg.sh icon.png icon-clean.png 15
```
### Generate App Icon Set (iOS)
```bash
for size in 1024 512 256 128 64 32 16; do
convert icon.png -resize ${size}x${size} icon-${size}.png
done
```
### Optimize for Web
```bash
convert large.png -quality 85 -resize 2000x2000\> optimized.webp
```
## Tips
- **Higher tolerance (20-50):** Better for anti-aliased edges, may remove some foreground
- **Lower tolerance (5-15):** Preserves detail, may leave color fringes
- **For flat icons:** 10-20 usually works best
- Use `-quality` for JPEG/WebP compression (0-100)
- Use `-strip` to remove metadata for smaller files
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