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ACL Pack

Faster than fast. Lighter than light.

ACL Pack is a high-performance computer-vision library optimized for ARM64. It ships as a static library (libacl.a) with a single C++17 header surface (<acl/api.h>), delivering NEON-accelerated operators with zero third-party runtime dependencies.

Quick Links

• Changelog
• API Reference
• GitHub Releases

Documentation Map

Page	What you'll find
Changelog	Version history, migration notes, and regression highlights.
API Reference	Operator catalog, getting started, error codes, type definitions, and per-category signatures.
Analysis	Integral, histogram, moments, matchTemplate, connected components, etc.
Arithmetic	Threshold, addWeighted, LUT, normalize, bitwise, etc.
Color Conversion	RGB↔Gray, RGB↔HSV/Lab/YUV, Bayer, gamma, channel swap.
Filter	Gaussian blur, box filter, bilateral, NL-Means, morphology, etc.
Geometric	Resize, rotate, warp, remap, pyramid.
Feature Detection	Harris, FAST, ORB, SIFT, SURF, HOG, Hough, optical flow.
Transform	WarpAffine, warpPerspective, remap, homography.
Math	DFT/IDFT, mulSpectrums.
Drawing	Line, rectangle, circle, text.
Contour Analysis	contourArea, convexHull, minAreaRect, fitEllipse.
Utilities	Helper and availability helpers.

Platform Support

Platform	Toolchain	Status
Android arm64-v8a	NDK 26.3+ (Clang 17)	✅ Stable
Linux aarch64	aarch64-linux-gnu-g++ 9.4+	✅ Stable (since v1.0.3)

License Tiers

• Trial — limited operators, fixed resolution, watermarked output.
• Starter — base operator set, uint8_t support.
• Pro — Starter + Pro operators, uint8_t / uint16_t.
• Business — full operator set, uint8_t / uint16_t / float.

See the operator catalog for tier annotations.