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Updated matchTemplate and added an example #389

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Mar 22, 2016
Merged

Updated matchTemplate and added an example #389

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40 changes: 38 additions & 2 deletions src/Matrix.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -2249,7 +2249,7 @@ NAN_METHOD(Matrix::MatchTemplate) {
v8::String::Utf8Value args0(info[0]->ToString());
std::string filename = std::string(*args0);
cv::Mat templ;
templ = cv::imread(filename, CV_8S);
templ = cv::imread(filename, -1);

Local<Object> out = Nan::New(Matrix::constructor)->GetFunction()->NewInstance();
Matrix *m_out = Nan::ObjectWrap::Unwrap<Matrix>(out);
Expand All @@ -2268,8 +2268,44 @@ NAN_METHOD(Matrix::MatchTemplate) {

int method = (info.Length() < 2) ? (int)cv::TM_CCORR_NORMED : info[1]->Uint32Value();
cv::matchTemplate(self->mat, templ, m_out->mat, method);
cv::normalize(m_out->mat, m_out->mat, 0, 1, cv::NORM_MINMAX, -1, cv::Mat());
double minVal;
double maxVal;
cv::Point minLoc;
cv::Point maxLoc;
cv::Point matchLoc;

info.GetReturnValue().Set(out);
minMaxLoc(m_out->mat, &minVal, &maxVal, &minLoc, &maxLoc, cv::Mat());

if(method == CV_TM_SQDIFF || method == CV_TM_SQDIFF_NORMED) {
matchLoc = minLoc;
}
else {
matchLoc = maxLoc;
}

//detected ROI
unsigned int roi_x = matchLoc.x;
unsigned int roi_y = matchLoc.y;
unsigned int roi_width = templ.cols;
unsigned int roi_height = templ.rows;

//draw rectangle
if(info.Length() >= 3) {
cv::Rect roi(roi_x,roi_y,roi_width,roi_height);
cv::rectangle(self->mat, roi, cv::Scalar(0,0,255));
}

m_out->mat.convertTo(m_out->mat, CV_8UC1, 255, 0);

v8::Local <v8::Array> arr = Nan::New<v8::Array>(5);
arr->Set(0, out);
arr->Set(1, Nan::New<Number>(roi_x));
arr->Set(2, Nan::New<Number>(roi_y));
arr->Set(3, Nan::New<Number>(roi_width));
arr->Set(4, Nan::New<Number>(roi_height));

info.GetReturnValue().Set(arr);
}

// @author ytham
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