This is a proof of concept project showing how to detect AprilTags using JavaScript. The original C code was cross compiled to JavaScript with emscripten. The result is html/apriltag.js. An example of how to use this wrapped c library can be found in html/index.html.

Try it out here. You can either choose the included example.jpg file, or, if you're on a device that allows you to directly capture images, you might want to capture a picture of the above image.

It should detect the three tags visible.

• Only the tag36h11 family is supported. I didn't bother including the other families as that seems to be the recommended anyway.

• The example code scales the input image down to a maximum resolution of 800x800. Otherwise Safari on my IPad crashes :-)

• All detection parameters are fixed at the moment. So you have to recompile with emscripten if you want to change any of those.

• No error handling whatsoever :-P