c++ - OpenCV WebAssembly

Question

我尝试运行本教程，http://videocortex.io/2017/opencv-web-app/ ，构建和试用 OpenCV WebAssembly。但是我无法完成“构建系统”步骤我已经构建了 emscripten 1.38.21，安装了 Python 2.7.5.3_64bit 和 CMAKE 3.13.2 但最终出现错误:

我错过了什么吗？

当我运行 emcc -v 时，我也遇到了一些错误:

WARNING:root:LLVM version appears incorrect (seeing "6.0", expected "3.7") ERROR:root:Emscripten, llvm and clang versions do not match, this is dangerous (1.35.0, "1.38.21", "1.38.21") ERROR:root:Make sure to use the same branch in each repo, and to be up-to-date on each. See http://kripken.github.io/emscripten-site/docs/building_from_source/LLVM-Backend.html INFO:root:(Emscripten: Running sanity checks) emcc (Emscripten gcc/clang-like replacement + linker emulating GNU ld) 1.35.0 clang version 6.0.1 (emscripten 1.38.21 : 1.38.21) Target: x86_64-pc-windows-msvc Thread model: posix InstalledDir: D:\Repositories\emsdk\clang\e1.38.21_64bit WARNING:root:LLVM version appears incorrect (seeing "6.0", expected "3.7") ERROR:root:Emscripten, llvm and clang versions do not match, this is dangerous (1.35.0, "1.38.21", "1.38.21") ERROR:root:Make sure to use the same branch in each repo, and to be up-to-date on each. See http://kripken.github.io/emscripten-site/docs/building_from_source/LLVM-Backend.html INFO:root:(Emscripten: Running sanity checks)

Answer 1

有人已经成功地将 OpenCV 编译成 WebAssembly。您可以访问GitHub repository并按照以下步骤操作:

1. 获取源代码:
   
git 克隆 https://github.com/ucisysarch/opencvjs.git
光盘 opencvjs
git 克隆 https://github.com/opencv/opencv
CD OpenCV
git 结帐 3.1.0

2. 安装 Emscripten:
./emsdk更新
./emsdk 安装 sdk-incoming-64bit --shallow
./emsdk 激活 sdk-incoming-64bit
来源./emsdk_env.sh

3. 将 OpenCV 构建为 WebAssembly。
python make.py --wasm