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image-manipulation-image-magick

✓ Official★ 36,202

by github · part of github/awesome-copilot

Process and manipulate images using ImageMagick. Supports resizing, format conversion, batch processing, and retrieving image metadata. Use when working with images, creating thumbnails, resizing wallpapers, or performing batch image operations.

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🧩 One of 7 skills in the github/awesome-copilot package — works on its own, and pairs well with its siblings.

This is the playbook your agent receives when the skill activates — you don't need to read it to use the skill, but it's here to audit before installing.

Image Manipulation with ImageMagick

This skill enables image processing and manipulation tasks using ImageMagick across Windows, Linux, and macOS systems.

When to Use This Skill

Use this skill when you need to:

  • Resize images (single or batch)
  • Get image dimensions and metadata
  • Convert between image formats
  • Create thumbnails
  • Process wallpapers for different screen sizes
  • Batch process multiple images with specific criteria

Core Capabilities

1. Image Information

  • Get image dimensions (width x height)
  • Retrieve detailed metadata (format, color space, etc.)
  • Identify image format

2. Image Resizing

  • Resize single images
  • Batch resize multiple images
  • Create thumbnails with specific dimensions
  • Maintain aspect ratios

3. Batch Processing

  • Process images based on dimensions
  • Filter and process specific file types
  • Apply transformations to multiple files

Guidelines

  1. Always quote file paths - Use quotes around file paths that might contain spaces
  2. Use the & operator (PowerShell) - Invoke the magick executable using & in PowerShell
  3. Store the path in a variable (PowerShell) - Assign the ImageMagick path to $magick for cleaner code
  4. Wrap in loops - When processing multiple files, use ForEach-Object (PowerShell) or for loops (Bash)
  5. Verify dimensions first - Check image dimensions before processing to avoid unnecessary operations
  6. Use appropriate resize flags - Consider using ! to force exact dimensions or ^ for minimum dimensions

Common Patterns

PowerShell Patterns

Pattern: Store ImageMagick Path

$magick = (Get-Command magick).Source

Pattern: Get Dimensions as Variables

$dimensions = & $magick identify -format "%w,%h" $_.FullName
$width,$height = $dimensions -split ','

Pattern: Conditional Processing

if ([int]$width -gt 1920) {
    & $magick $_.FullName -resize 1920x1080 $outputPath
}

Pattern: Create Thumbnails

& $magick $_.FullName -resize 427x240 "thumbnails/thumb_$($_.Name)"

Bash Patterns

Pattern: Check ImageMagick Installation

command -v magick &> /dev/null || { echo "ImageMagick required"; exit 1; }

Pattern: Get Dimensions as Variables

dimensions=$(magick identify -format "%w,%h" "$img")
width=$(echo "$dimensions" | cut -d',' -f1)
height=$(echo "$dimensions" | cut -d',' -f2)

Pattern: Conditional Processing

if [[ "$width" -gt 1920 ]]; then
    magick "$img" -resize 1920x1080 "$outputPath"
fi

Pattern: Create Thumbnails

filename=$(basename "$img")
magick "$img" -resize 427x240 "thumbnails/thumb_$filename"