jdluther2020/crop-tool
skills/crop-tool/SKILL.md
Gives Claude the ability to crop and enhance specific regions of an image for detailed analysis, improving accuracy on vision tasks involving small text, charts, legends, and fine details.
tools
Updated Apr 6, 2026
$ install --global
skillsauthnpx skillsauth add jdluther2020/ai-claude-code-talk crop-toolInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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Last scanned: Apr 6, 2026, 2:56 AM3.9s16 files scanned
SKILL.md
- name:
- crop-tool
- description:
- Gives Claude the ability to crop and enhance specific regions of an image for detailed analysis, improving accuracy on vision tasks involving small text, charts, legends, and fine details.
Crop Tool
When to Use
- Reading small text, legends, or axis labels in charts
- Extracting values from dense tables or diagrams
- Any region where initial analysis feels uncertain
How to Use
Simply ask naturally about the image. Claude decides which regions to examine and handles the cropping automatically — no coordinates or technical input needed from the user.
"Read the values in the legend."
"What does the small text in the bottom section say?"
"Compare the metrics across all three columns."
Skill Mechanics
See Giving Claude a crop tool for better image analysis for a detailed understanding of the mechanics.
In addition to cropping, this skill enhances the extracted region further:
- 2x upscale — using LANCZOS resampling for maximum quality
- 1.4x contrast boost — makes text and edges pop
- 1.3x sharpness boost — reduces blur introduced by upscaling
How Claude Must Invoke the Tool
IMPORTANT: Always use the skill's crop_tool.py CLI via Bash — do NOT write your own PIL/image-processing code.
python3 /Users/jdl/.claude/skills/crop-tool/crop_tool.py \
<image_path> <x1> <y1> <x2> <y2> [--output <out_path>]
- Coordinates are normalized (0–1), where
(0,0)is top-left and(1,1)is bottom-right - The script prints the output file path; read that file with the Read tool to view the cropped region
- Iterate across regions as needed until the question is fully answered
Example:
python3 /Users/jdl/.claude/skills/crop-tool/crop_tool.py \
chart.png 0.5 0.2 1.0 0.65 --output /tmp/legend_crop.png
For full documentation see README.md.
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