@camera.ui/rust-postprocessor

Native Rust detection post-processing for the camera.ui ecosystem — NMS, IoU, box merging, a multi-class IoU + Kalman object tracker, line-crossing events and zone filtering.

Built with napi-rs — ships prebuilt binaries for Linux (glibc/musl), macOS, Windows and FreeBSD across x64, arm64 and riscv64, so there is no compile step on install.

Installation

npm install @camera.ui/rust-postprocessor

Usage

import { nms, merge, ObjectTracker } from '@camera.ui/rust-postprocessor';

// Greedy non-maximum suppression (per label), normalized [0,1] boxes
const kept = nms(detections, 0.5);

// Cluster nearby/overlapping same-label boxes into union boxes
const merged = merge(detections, 0.5, 0.02);

// Stateful multi-class tracker with stable track ids across frames
const tracker = new ObjectTracker({ iouThreshold: 0.3, hitCounterMax: 15 });
const { tracked, crossings } = tracker.update(detections, Date.now());

Also exposes nmsIndices, boxIou, and tracker configuration for crossing lines (setLines), detection zones / privacy masks (setZones), confidence thresholds and ReID. See index.d.ts for the full, documented API.

Development

npm install
npm run build        # release build (napi build --platform --release)
npm run build:debug  # debug build
npm run lint         # cargo clippy + eslint

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Part of the camera.ui ecosystem - A comprehensive camera management solution.