Latest Build (2026-02-09)

Latest OpenCV.js Build

Auto-updated on every push to main branch.

• Build Date: 2026-02-09
• Commit: 5536ff9
• OpenCV Version: 4.13.0

Available Builds

Build	WASM Size	Use Case
Essential	5.4M	Core image processing, fast loading
Full	9.7M	All features including DNN, contrib, threading

Feature Comparison

Feature	Essential	Full
Core Modules
Basic operations (Mat, Scalar, Point)	✅	✅
Image processing (blur, threshold, morphology)	✅	✅
Edge detection (Canny, Sobel, Laplacian)	✅	✅
Drawing functions (lines, shapes, text)	✅	✅
Color conversion (BGR, HSV, Lab)	✅	✅
Contour detection	✅	✅
Feature detection (ORB, AKAZE, BRISK)	✅	✅
Camera calibration (calib3d)	✅	✅
Advanced Modules
DNN (deep neural network inference)	❌	✅
Object detection (Haar, HOG)	❌	✅
Photo (denoising, HDR, inpainting)	❌	✅
Video analysis (optical flow, tracking)	❌	✅
Machine learning (ml)	❌	✅
Stitching	❌	✅
Contrib Modules
ArUco marker detection	❌	✅
SIFT/SURF (xfeatures2d)	❌	✅
Face recognition	❌	✅
Extended image processing (ximgproc)	❌	✅
Background segmentation (bgsegm)	❌	✅
Object tracking (KCF, CSRT)	❌	✅
Image hashing (pHash)	❌	✅
WeChat QR code detection	❌	✅
Performance
SIMD optimization	✅	✅
Multi-threading (Web Workers)	❌	✅

Download Files

Build	JavaScript	WebAssembly
Essential	opencv-essential.js	opencv_js-essential.wasm
Full	opencv-full.js	opencv_js-full.wasm

Quick Usage

// Essential build (smaller, faster)
import cv from 'opencv-contrib-wasm/essential';

// Full build (all features)
import cv from 'opencv-contrib-wasm/full';

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For stable releases, use a versioned release instead.