Brent Perteet
2719ec244d
Created split_png_by_brightness.py to split rasterized logos into separate SVG files by color for Underground Magnetics logo conversion. Key features: - OpenCV contour hierarchy detection for proper hole handling - Letters with enclosed shapes (d, o, g, etc.) now render correctly - Tight brightness thresholds to avoid antialiasing artifacts - Automatic bounding box cropping for optimal file sizes - Black text: brightness < 40 (236k pixels, 21 shape groups) - Grey icon: brightness 108-118 (119k pixels, 2 shape groups) Results: - um_black.svg: 6.1KB, 3070x233px (was 139KB, 3613x391px) - um_grey.svg: 728B, 413x390px (was 253KB, 3613x391px) Files: - split_png_by_brightness.py: Main color separation tool - IMPROVEMENTS.md: Detailed changelog and comparison - README_underground_magnetics.md: Usage documentation - underground-magnetics.eps: Source logo file - um_black.svg: Separated black text (cropped) - um_grey.svg: Separated grey icon (cropped) - requirements.txt: Added opencv-python dependency 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
22 lines
357 B
Plaintext
22 lines
357 B
Plaintext
cairocffi==1.7.1
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CairoSVG==2.9.0
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cffi==2.0.0
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cssselect2==0.9.0
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defusedxml==0.7.1
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ImageIO==2.37.3
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lazy-loader==0.5
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mapbox_earcut==2.0.0
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networkx==3.4.2
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numpy==2.2.6
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opencv-python==4.13.0.92
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packaging==26.2
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pillow==12.2.0
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pycparser==3.0
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scikit-image==0.25.2
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scipy==1.15.3
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shapely==2.1.2
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tifffile==2025.5.10
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tinycss2==1.5.1
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trimesh==4.12.2
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webencodings==0.5.1
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