int initARtagPose(int width, int height, float markerWidth, vector<string> camParamFiles)
{
size_t numPixels = width*height;
cameraBuffer = new unsigned char[numPixels];
imgwidth = width;
imgheight = height;
patternCenter_[0] = patternCenter_[1] = 0.0;
patternWidth_ = markerWidth;
numCams_ = camParamFiles.size();
trackers = new ARToolKitPlus::TrackerSingleMarker *[numCams_];
// create a tracker that does:
// - 6x6 sized marker images
// - samples at a maximum of 6x6
// - works with luminance (gray) images
// - can load a maximum of 1 pattern
// - can detect a maximum of 8 patterns in one image
for (int i = 0; i < numCams_; ++i) {
if (camParamFiles[i].compare("null") == 0) {
trackers[i] = NULL;
continue;
}
ARToolKitPlus::TrackerSingleMarker *tracker = new ARToolKitPlus::TrackerSingleMarkerImpl<6,6,6, 1, 8>(width,height);
tracker->setPixelFormat(ARToolKitPlus::PIXEL_FORMAT_LUM);
// load a camera file.
if(!tracker->init(camParamFiles[i].c_str(), 1.0f, 1000.0f))
{
printf("ERROR: init() failed\n");
delete cameraBuffer;
delete tracker;
return -1;
}
// define size of the marker
tracker->setPatternWidth(patternWidth_);
// the marker in the BCH test image has a thin border...
tracker->setBorderWidth(THIN_PATTERN_BORDER);
// set a threshold. alternatively we could also activate automatic thresholding
tracker->setThreshold(150);
tracker->activateAutoThreshold(true);
// let's use lookup-table undistortion for high-speed
// note: LUT only works with images up to 1024x1024
tracker->setUndistortionMode(ARToolKitPlus::UNDIST_LUT);
// RPP is more robust than ARToolKit's standard pose estimator
tracker->setPoseEstimator(ARToolKitPlus::POSE_ESTIMATOR_RPP);
//tracker->setPoseEstimator(ARToolKitPlus::POSE_ESTIMATOR_ORIGINAL);
// switch to simple ID based markers
// use the tool in tools/IdPatGen to generate markers
tracker->setMarkerMode(useBCH ? ARToolKitPlus::MARKER_ID_BCH : ARToolKitPlus::MARKER_ID_SIMPLE);
trackers[i] = tracker;
}
init = true;
return 0;
}
int main(int argc, char** argv)
{
// switch this between true and false to test
// simple-id versus BCH-id markers
//
const bool useBCH = false;
const int width = 320, height = 240, bpp = 1;
size_t numPixels = width*height*bpp;
size_t numBytesRead;
const char *fName = useBCH ? "data/image_320_240_8_marker_id_bch_nr0100.raw" :
"data/image_320_240_8_marker_id_simple_nr031.raw";
unsigned char *cameraBuffer = new unsigned char[numPixels];
MyLogger logger;
// try to load a test camera image.
// these images files are expected to be simple 8-bit raw pixel
// data without any header. the images are expetected to have a
// size of 320x240.
//
if(FILE* fp = fopen(fName, "rb"))
{
numBytesRead = fread(cameraBuffer, 1, numPixels, fp);
fclose(fp);
}
else
{
printf("Failed to open %s\n", fName);
delete cameraBuffer;
return -1;
}
if(numBytesRead != numPixels)
{
printf("Failed to read %s\n", fName);
delete cameraBuffer;
return -1;
}
// create a tracker that does:
// - 6x6 sized marker images
// - samples at a maximum of 6x6
// - works with luminance (gray) images
// - can load a maximum of 1 pattern
// - can detect a maximum of 8 patterns in one image
ARToolKitPlus::TrackerSingleMarker *tracker = new ARToolKitPlus::TrackerSingleMarkerImpl<6,6,6, 1, 8>(width,height);
const size_t memUsage = tracker->getMemoryUsage();
printf("ARToolKitPlus memory usage: %ld kBytes\n", memUsage/1024);
const char* description = tracker->getDescription();
printf("ARToolKitPlus compile-time information:\n%s\n\n", description);
// set a logger so we can output error messages
//
tracker->setLogger(&logger);
tracker->setPixelFormat(ARToolKitPlus::PIXEL_FORMAT_LUM);
//tracker->setLoadUndistLUT(true);
// load a camera file. two types of camera files are supported:
// - Std. ARToolKit
// - MATLAB Camera Calibration Toolbox
if(!tracker->init("data/LogitechPro4000.dat", 1.0f, 1000.0f)) // load std. ARToolKit camera file
//if(!tracker->init("data/PGR_M12x0.5_2.5mm.cal", 1.0f, 1000.0f)) // load MATLAB file
{
printf("ERROR: init() failed\n");
delete cameraBuffer;
delete tracker;
return -1;
}
// define size of the marker
tracker->setPatternWidth(80);
// the marker in the BCH test image has a thin border...
tracker->setBorderWidth(useBCH ? 0.125f : 0.250f);
// set a threshold. alternatively we could also activate automatic thresholding
tracker->setThreshold(150);
// let's use lookup-table undistortion for high-speed
// note: LUT only works with images up to 1024x1024
tracker->setUndistortionMode(ARToolKitPlus::UNDIST_LUT);
// RPP is more robust than ARToolKit's standard pose estimator
//tracker->setPoseEstimator(ARToolKitPlus::POSE_ESTIMATOR_RPP);
// switch to simple ID based markers
// use the tool in tools/IdPatGen to generate markers
tracker->setMarkerMode(useBCH ? ARToolKitPlus::MARKER_ID_BCH : ARToolKitPlus::MARKER_ID_SIMPLE);
// do the OpenGL camera setup
//glMatrixMode(GL_PROJECTION)
//glLoadMatrixf(tracker->getProjectionMatrix());
// here we go, just one call to find the camera pose
int markerId = tracker->calc(cameraBuffer);
float conf = (float)tracker->getConfidence();
// use the result of calc() to setup the OpenGL transformation
//glMatrixMode(GL_MODELVIEW)
//glLoadMatrixf(tracker->getModelViewMatrix());
printf("\n\nFound marker %d (confidence %d%%)\n\nPose-Matrix:\n ", markerId, (int(conf*100.0f)));
for(int i=0; i<16; i++)
printf("%.2f %s", tracker->getModelViewMatrix()[i], (i%4==3)?"\n " : "");
tracker->getDescription();
delete [] cameraBuffer;
delete tracker;
return 0;
}