v0.3.1

[0.3.1] - 2026-05-01

🐛 Bug Fixes

• (video) Fix calc_optical_flow_pyramid_lk doctest using blank image
• (core, benches, video) Resolve clippy warnings for data_ptr casts and implicit saturating sub

📚 Documentation

• (core) Add doc-test example for Scalar::channel_or_default
• (video) Improve doc comments on optical_flow example helpers
• (benchmarks) Remove accidentally duplicated header from benchmark_results.md
• (wasm) Fix outdated api references in readme (fixes #42)

🕸️ WebAssembly & Emscripten

• (wasm) Add optical flow bindings and webcam demo
• (wasm) Expose data_ptr, copy_to, and VecN to JS bindings

🚀 Features

• (core) Add generic N-dimensional VecN type
• (core) Add VecN::new() constructors and Add/Sub for VecN
• (core) Add vecn_ops example demonstrating VecN type
• (core) Add data_ptr, data_ptr_mut, and copy_to to Matrix
• (video) Implement buildOpticalFlowPyramid and calcOpticalFlowPyrLK
• (video) Add optical_flow example using real image (butterfly.jpg)
• (video) Add multi-frame optical flow example with GIF input
• (video) Add parallel and SIMD support to optical flow functions

🚜 Refactor

• (core) Extract Scalar::channel_or_default, rename verbose test

🧪 Testing

• (video) Add optical flow benchmarks and update documentation