image-tools

Original：🇺🇸 English
Translated

Image analysis and manipulation. Use when: user wants to analyze images, extract metadata, convert formats, resize, or get image information.

6installs
Sourcewinsorllc/upgraded-carnival
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NPX Install

npx skill4agent add winsorllc/upgraded-carnival image-tools

Tags

Translated version includes tags in frontmatter
image-processingimage-analysiscommand-line-toolsimagemagicktesseract

SKILL.md Content

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Image Tools Skill

Image analysis and manipulation tools.

When to Use

  • Extract image metadata (EXIF, dimensions, format)
  • Convert between image formats
  • Resize or crop images
  • Analyze image content
  • Get image information

Image Information

Get Image Details

bash
# Using file command
file image.jpg

# Using identify (ImageMagick)
identify -verbose image.jpg

# Get dimensions
identify -format "%wx%h" image.jpg

# Get EXIF data
identify -format "%[EXIF:*]" image.jpg

Quick Info Script

bash
#!/bin/bash
# Get basic image info
FILE="$1"
if [ -z "$FILE" ]; then
    echo "Usage: $0 <image-file>"
    exit 1
fi

echo "=== Image Info ==="
file "$FILE"
echo ""
echo "Dimensions:"
identify -format "%wx%h\n" "$FILE"
echo ""
echo "Format:"
identify -format "%m\n" "$FILE"

Image Conversion

Convert Formats

bash
# PNG to JPEG
convert input.png output.jpg

# JPEG to PNG
convert input.jpg output.png

# Convert to grayscale
convert input.jpg -colorspace Gray output.jpg

# Resize
convert input.jpg -resize 800x600 output.jpg
convert input.jpg -resize 50% output.jpg

WebP Conversion

bash
# JPEG to WebP
cwebp input.jpg -o output.webp

# PNG to WebP
cwebp -lossless input.png -o output.webp

Image Analysis

Count Colors

bash
# Unique colors in image
identify -format "%k" input.jpg

Image Histogram

bash
# Get color histogram
convert input.jpg -format %c histogram:info:-

# Simple histogram
identify -verbose input.jpg | grep -A 100 "Histogram:"

OCR (Text Extraction)

bash
# Extract text from image
tesseract image.jpg stdout

# Specific language
tesseract image.jpg stdout -l eng

Screenshots

Capture Screen

bash
# Full screen (Linux)
import -window root screenshot.png

# Region selection
import screenshot.png

# Using scrot (if installed)
scrot -s selection.png

Capture URL as Image

bash
# Using wkhtmltoimage
wkhtmltoimage https://example.com page.png

# Using chromium headless
chromium --headless --screenshot=output.png https://example.com

Useful Tools

ToolPurpose
file
Detect file type
identify
Get image metadata
convert
Format conversion, resize
composite
Blend images
montage
Create image grids
tesseract
OCR text extraction

Examples

Check if image is valid:
bash
file image.jpg && identify image.jpg >/dev/null 2>&1 && echo "Valid image"
Batch resize:
bash
for f in *.jpg; do convert "$f" -resize 800x600 "thumb_$f"; done
Extract thumbnail:
bash
convert input.jpg -thumbnail 200x200^ -gravity center -extent 200x200 thumb.jpg