Help install

[vardenko12]

Please help me build this assembly.

Also, please help me, if possible, add a web worker to this assembly.

I am ready to pay for your work. Write to TG: @ vardenko1

[EdwardLu2018]

Sure. What do you need help on?

First step is to download and install emsdk:

git clone https://github.com/emscripten-core/emsdk
cd emsdk
./emsdk update
./emsdk install 1.39.16
./emsdk activate 1.39.16

Next, instead of building opencv, you can use opencv-em, made by the lovely folks at webarkit: https://gist.github.com/kalwalt/a5fb9230f21b9e39f6fbc872cf20c376

OR you can build opencv_js: https://docs.opencv.org/master/d4/da1/tutorial_js_setup.html

After all this, run ./build.sh

I am working on adding a web worker.

[stevanusdk]

Hi @EdwardLu2018

amazing, I am also looking at how to build the CPP code with OpenCV files (like your img_tracker_wasm.cpp),
when I run build.sh, it gives me the error wasm-ar/emscripten/img_tracker_wasm.cpp:5:10: fatal error: 'opencv2/opencv.hpp' file not found, may I know if there is anything that I miss?

Note:
I am using Emscripten v.3.1.34,
but changed to v. 1.39.16, it produce the same error,

[ 33%] Building CXX object CMakeFiles/img_tracker_wasm.dir/emscripten/img_tracker_wasm.cpp.o
../wasm-ar/emscripten/img_tracker_wasm.cpp:5:10: fatal error: 'opencv2/opencv.hpp' file not found
#include <opencv2/opencv.hpp>
^~~~~~~~~~~~~~~~~~~~

[EdwardLu2018]

You should build opencv_wasm from source. The opencv-em way is a bit outdated. Then it should work with latest version of emsdk:

git clone git@github.com:opencv/opencv.git
cd opencv
python3 ./platforms/js/build_js.py build_wasm --build_wasm

I updated the README. Been while since I've worked on this repo, so many things may be out of date...
Feel free to make a PR if you get it working and I missed something!

[hexwhyzet]

Hi, could explain, please, what should I make with folder build_wasm that I got after building opencv to build project? Where should I place it? Or should I write sudo make install?

I tried to place opencv inside your project, and build_wasm inside opencv, but I got new error

In file included from /home/kabakov/webasm/wasm-ar/emscripten/img_tracker_wasm.cpp:5:
/home/kabakov/webasm/wasm-ar/opencv/include/opencv2/opencv.hpp:52:10: fatal error: 'opencv2/core.hpp' file not found
   52 | #include "opencv2/core.hpp"
      |          ^~~~~~~~~~~~~~~~~~
1 error generated.