add detect_tresh to kcf params

Author: piercus

cc/modules/tracking/Trackers/TrackerKCFParams.cc

@@ -19,6 +19,7 @@ NAN_MODULE_INIT(TrackerKCFParams::Init) {
 	Nan::SetAccessor(instanceTemplate, FF_NEW_STRING("interp_factor"), interp_factorGet, interp_factorSet);
 	Nan::SetAccessor(instanceTemplate, FF_NEW_STRING("output_sigma_factor"), output_sigma_factorGet, output_sigma_factorSet);
 	Nan::SetAccessor(instanceTemplate, FF_NEW_STRING("pca_learning_rate"), pca_learning_rateGet, pca_learning_rateSet);
+	Nan::SetAccessor(instanceTemplate, FF_NEW_STRING("detect_thresh"), detect_threshGet, detect_threshSet);
 	Nan::SetAccessor(instanceTemplate, FF_NEW_STRING("resize"), resizeGet, resizeSet);
 	Nan::SetAccessor(instanceTemplate, FF_NEW_STRING("split_coeff"), split_coeffGet, split_coeffSet);
 	Nan::SetAccessor(instanceTemplate, FF_NEW_STRING("wrap_kernel"), wrap_kernelGet, wrap_kernelSet);

cc/modules/tracking/Trackers/TrackerKCFParams.h

@@ -23,6 +23,8 @@ class TrackerKCFParams : public Nan::ObjectWrap {
 	static FF_SETTER_NUMBER(TrackerKCFParams, output_sigma_factor, params.output_sigma_factor);
 	static FF_GETTER(TrackerKCFParams, pca_learning_rateGet, params.pca_learning_rate);
 	static FF_SETTER_NUMBER(TrackerKCFParams, pca_learning_rate, params.pca_learning_rate);
+	static FF_GETTER(TrackerKCFParams, detect_threshGet, params.detect_thresh);
+	static FF_SETTER_NUMBER(TrackerKCFParams, detect_thresh, params.detect_thresh);
 	static FF_GETTER(TrackerKCFParams, resizeGet, params.resize);
 	static FF_SETTER_BOOL(TrackerKCFParams, resize, params.resize);
 	static FF_GETTER(TrackerKCFParams, split_coeffGet, params.split_coeff);

test/tests/modules/tracking/trackerParamTests.js

@@ -32,6 +32,7 @@ module.exports = () => {
         compress_feature: false,
         max_patch_size: 64,
         compressed_size: 32,
+        detect_thresh: 0.5,
         desc_pca: cv.trackerKCFModes.GRAY,
         desc_npca: cv.trackerKCFModes.CN