OpenCV.js 4.13.0 (Build #2)

Build Configuration

• OpenCV Version: 4.13.0
• Emscripten Version: 4.0.20
• Build Flags: Default (-s WASM=1 -s SINGLE_FILE=1 -s USE_PTHREADS=0)
• CMake Options: -DCMAKE_CXX_STANDARD=17
• Build Date: 2026-01-28 14:20:24 UTC
• Build Number: #2

File Information

• File Size: 9.0M
• SHA256: 7d04b9822f29c6d7784235cc9557037b3b85d95e15c80f2a9194e6a4bb9a3f8c

For more information, see OpenCV.js Tutorials.

OpenCV.js 4.13.0 (Build #1)

Build Configuration

• OpenCV Version: 4.13.0
• Emscripten Version: 2.0.10
• Build Flags: Default (-s WASM=1 -s SINGLE_FILE=1 -s USE_PTHREADS=0)
• Build Date: 2026-01-21 09:50:29 UTC
• Build Number: #1

File Information

• File Size: 11M
• SHA256: de3686e38ab24a5cccdfb1be49659a03365b8e3d2fa032e01e07df0bc7a8fc67

For more information, see OpenCV.js Tutorials.

v4.12.0-release.1

What's Changed

• Update opencv.js to 4.12.0
• Fix: Make second parameter of Mat.ucharPtr optional by @Copilot in #83
• Add comprehensive GitHub Copilot instructions for opencv-js development by @Copilot in #95
• Add TypeScript definitions for QRCodeDetector and QRCodeDetectorAruco with comprehensive tests by @Copilot in #92
• Fix boxPoints type definition to match runtime behavior by @Copilot in #97
• Add TypeScript definitions for applyColorMap function and colormap constants by @Copilot in #88

New Contributors

• @Copilot made their first contribution in #83

Full Changelog: v4.11.0-release.1...v4.12.0-release.1

v4.11.0-release.1

Breaking Changes

• needs to use a different way to import opencv.js 4.11.0 (see README)

What's Changed

• fix: RotatedRect types by @dusionlike in #77

New Contributors

• @dusionlike made their first contribution in #77

Full Changelog: v4.10.0-release.1...v4.11.0-release.1

v4.10.0-release.1

What's Changed

• Complement Mat class and BackgroundSubtractorMOG2 declaration by @Piemontez in #61
• Change import to import type when importing _types.ts by @tbmc in #68

New Contributors

• @Piemontez made their first contribution in #61
• @tbmc made their first contribution in #68

Full Changelog: v4.9.0-release.3...v4.10.0-release.1

v4.9.0-release.3

What's Changed

• Correct TypeScript signature for minEnclosingCircle to match opencv.js single parameter by @th-alexmak in #57

New Contributors

• @th-alexmak made their first contribution in #57

Full Changelog: v4.9.0-release.2...v4.9.0-release.3

v4.9.0-release.2

• export TypeScript declaration cv.fisheye_initUndistortRectifyMap (#51)

v4.9.0-release.1

• Update opencv.js to version 4.9.0

v4.8.0-release.10

Fix TypeScript declaration issue #43

v4.8.0-release.9

• Fix TypeScript declaration #40