Emscripten port of ARToolKit to JavaScript
- web (demos and examples using ARToolKit.js)
- tools (build scripts for building ARToolKit.js)
- emscripten (source code for ARToolKit.js)
- builds (compiled versions of ARToolKit.js)
- docs (documentation, coming...)
- Install Emscripten (w/ node.js + python)
- Configure parameters in jsartoolkit/tools/makem.js
- Run
node jsartoolkit/tools/makem.js(Make sure EMSCRIPTEN env variable is set. E.g. EMSCRIPTEN=/usr/lib/emsdk_portable/emscripten/master/ node jsartoolkit/tools/makem) - The built ASM.js files are in jsartoolkit/build. There's a build with debug symbols in artoolkit.debug.js and the optimized build with bundled JS API in artoolkit.min.js.
<script async src="jsartoolkit/build/artoolkit.min.js></script> - include optimized ASM.js build and JS API
<script src="jsartoolkit/build/artoolkit.debug.js></script> - include debug build
<script src="jsartoolkit/js/artoolkit.api.js></script> - include JS API
<script async src="jsartoolkit/build/artoolkit.min.js></script> - include optimized ASM.js build and JS API
<script async src="three.min.js"></script> - include Three.js
<script async src="jsartoolkit/js/artoolkit.three.js></script> - include Three.js helper API
<script>
window.ARThreeOnLoad = function() {
console.log("Three.js helper API loaded");
};
if (window.ARController && window.ARController.getUserMediaThreeScene) {
ARThreeOnLoad();
}
</script>
See jsartoolkit/examples for examples on using the raw API and the Three.js helper API.
The basic operation goes like this: load a camera param, create an AR controller, set pattern detection mode, load pattern markers or multimarkers if needed, add a getMarker event listener, and call the AR controller's process method with the image.
<script src="jsartoolkit/build/artoolkit.min.js"></script>
<script>
var param = new ARCameraParam();
param.onload = function() {
var img = document.getElementById('my-image');
var ar = new ARController(img.width, img.height, param);
// Set pattern detection mode to detect both pattern markers and barcode markers.
// This is more error-prone than detecting only pattern markers (default) or only barcode markers.
//
// For barcode markers, use artoolkit.AR_MATRIX_CODE_DETECTION
// For pattern markers, use artoolkit.AR_TEMPLATE_MATCHING_COLOR
//
ar.setPatternDetectionMode(artoolkit.AR_TEMPLATE_MATCHING_COLOR_AND_MATRIX);
ar.addEventListener('markerNum', function(ev) {
console.log('got markers', markerNum);
})
ar.addEventListener('getMarker', function(ev) {
console.log('found marker?', ev);
})
ar.loadMarker('Data/patt.hiro', function(marker) {
console.log('loaded marker', marker);
ar.process(img);
});
};
param.src = 'Data/camera_para.dat';
the calls your JS apps needs
artoolkit.init(path, camera_param_path)- load path for artoolkit emscripten filesartoolkit.onReady(callback)- runs callback when artoolkit has completely downloaded, initalized and ready to runartoolkit.setup(width, height);- initalize a buffer size for a canvas of width & heightartoolkit.process(canvas);- extracts a frame from a canvas and process itartoolkit.debugSetup()- enables debugging, adds a threshold image to the domartoolkit.getDetectedMarkers()- returns an array of detected markers from last detection processartoolkit.getCameraMatrix()-artoolkit.getTransformationMatrix()-
calls called from emscripten runtime -> artoolkit.js
artoolkit.onFrameMalloc(object)- gets called when frame buffer gets allocated for canvasartoolkit.onMarkerNum(number)- gets called with the numbers of markers detectedartoolkit.onGetMarker(object, index)- gets called with the marker struct for the positioned marker
calls available from js -> emscripten
_setup(width, height)_setThreshold(int)- 0 to 255_process()_setDebugMode(boolean)_addMarker(string)setThresholdsetThresholdMode()eg. `Module.setThresholdMode(Module.AR_LABELING_THRESH_MODE_AUTO_MEDIAN / AR_LABELING_THRESH_MODE_AUTO_OTSU );setLabelingModesetPatternDetectionModesetMatrixCodeType(): Eg. Module.setMatrixCodeType(Module.AR_MATRIX_CODE_3x3);setImageProcModesetPattRatio
artoolkit.init('', 'camera_para.dat').onReady(function() {
artoolkit.setProjectionNearPlane(1);
artoolkit.setProjectionFarPlane(1000);
artoolkit.setPatternDetectionMode(artoolkit.CONSTANTS.AR_MATRIX_CODE_DETECTION);
artoolkit.setMatrixCodeType(artoolkit.CONSTANTS.AR_MATRIX_CODE_4x4);
})
artoolkit.init('', 'camera_para.dat').onReady(function() {
artoolkit.addMarker('../bin/Data/patt.hiro', function(marker) {
artoolkit.process(v);
})
})
prepend all these constants with Module. or artoolkit.CONSTANTS to access them
- AR_DEBUG_DISABLE
- AR_DEBUG_ENABLE
- AR_DEFAULT_DEBUG_MODE
- AR_LABELING_WHITE_REGION
- AR_LABELING_BLACK_REGION
- AR_DEFAULT_LABELING_MODE
- AR_DEFAULT_LABELING_THRESH
- AR_IMAGE_PROC_FRAME_IMAGE
- AR_IMAGE_PROC_FIELD_IMAGE
- AR_DEFAULT_IMAGE_PROC_MODE
- AR_TEMPLATE_MATCHING_COLOR
- AR_TEMPLATE_MATCHING_MONO
- AR_MATRIX_CODE_DETECTION
- AR_TEMPLATE_MATCHING_COLOR_AND_MATRIX
- AR_TEMPLATE_MATCHING_MONO_AND_MATRIX
- AR_DEFAULT_PATTERN_DETECTION_MODE
- AR_USE_TRACKING_HISTORY
- AR_NOUSE_TRACKING_HISTORY
- AR_USE_TRACKING_HISTORY_V2
- AR_DEFAULT_MARKER_EXTRACTION_MODE
- AR_MAX_LOOP_COUNT
- AR_LOOP_BREAK_THRESH
- AR_MATRIX_CODE_3x3
- AR_MATRIX_CODE_3x3_HAMMING63 5
- AR_MATRIX_CODE_3x3_PARITY65 2
- AR_MATRIX_CODE_4x4
- AR_MATRIX_CODE_4x4_BCH_13_9_3 7
- AR_MATRIX_CODE_4x4_BCH_13_5_5 10
- AR_LABELING_THRESH_MODE_MANUAL
- AR_LABELING_THRESH_MODE_AUTO_MEDIAN
- AR_LABELING_THRESH_MODE_AUTO_OTSU
- AR_LABELING_THRESH_MODE_AUTO_ADAPTIVE
- AR_MARKER_INFO_CUTOFF_PHASE_NONE
- AR_MARKER_INFO_CUTOFF_PHASE_PATTERN_EXTRACTION
- AR_MARKER_INFO_CUTOFF_PHASE_MATCH_GENERIC
- AR_MARKER_INFO_CUTOFF_PHASE_MATCH_CONTRAST
- AR_MARKER_INFO_CUTOFF_PHASE_MATCH_BARCODE_NOT_FOUND
- AR_MARKER_INFO_CUTOFF_PHASE_MATCH_BARCODE_EDC_FAIL
- AR_MARKER_INFO_CUTOFF_PHASE_MATCH_CONFIDENCE
- AR_MARKER_INFO_CUTOFF_PHASE_POSE_ERROR
- AR_MARKER_INFO_CUTOFF_PHASE_POSE_ERROR_MULTI
- AR_MARKER_INFO_CUTOFF_PHASE_HEURISTIC_TROUBLESOME_MATRIX_CODES
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