mirror of
https://github.com/peterbraden/node-opencv.git
synced 2025-12-08 19:45:55 +00:00
376 lines
14 KiB
C++
Executable File
376 lines
14 KiB
C++
Executable File
#include "Contours.h"
|
|
#include "OpenCV.h"
|
|
#include <nan.h>
|
|
|
|
#include <iostream>
|
|
|
|
Nan::Persistent<FunctionTemplate> Contour::constructor;
|
|
|
|
void Contour::Init(Local<Object> target) {
|
|
Nan::HandleScope scope;
|
|
|
|
// Class/contructor
|
|
Local<FunctionTemplate> ctor = Nan::New<FunctionTemplate>(Contour::New);
|
|
constructor.Reset(ctor);
|
|
ctor->InstanceTemplate()->SetInternalFieldCount(1);
|
|
ctor->SetClassName(Nan::New("Contours").ToLocalChecked());
|
|
|
|
// Prototype
|
|
// Local<ObjectTemplate> proto = constructor->PrototypeTemplate();
|
|
Nan::SetPrototypeMethod(ctor, "point", Point);
|
|
Nan::SetPrototypeMethod(ctor, "points", Points);
|
|
Nan::SetPrototypeMethod(ctor, "size", Size);
|
|
Nan::SetPrototypeMethod(ctor, "cornerCount", CornerCount);
|
|
Nan::SetPrototypeMethod(ctor, "area", Area);
|
|
Nan::SetPrototypeMethod(ctor, "arcLength", ArcLength);
|
|
Nan::SetPrototypeMethod(ctor, "approxPolyDP", ApproxPolyDP);
|
|
Nan::SetPrototypeMethod(ctor, "convexHull", ConvexHull);
|
|
Nan::SetPrototypeMethod(ctor, "boundingRect", BoundingRect);
|
|
Nan::SetPrototypeMethod(ctor, "minAreaRect", MinAreaRect);
|
|
Nan::SetPrototypeMethod(ctor, "fitEllipse", FitEllipse);
|
|
Nan::SetPrototypeMethod(ctor, "isConvex", IsConvex);
|
|
Nan::SetPrototypeMethod(ctor, "moments", Moments);
|
|
Nan::SetPrototypeMethod(ctor, "hierarchy", Hierarchy);
|
|
Nan::SetPrototypeMethod(ctor, "serialize", Serialize);
|
|
Nan::SetPrototypeMethod(ctor, "deserialize", Deserialize);
|
|
target->Set(Nan::GetCurrentContext(), Nan::New("Contours").ToLocalChecked(), ctor->GetFunction( Nan::GetCurrentContext() ).ToLocalChecked());
|
|
};
|
|
|
|
NAN_METHOD(Contour::New) {
|
|
Nan::HandleScope scope;
|
|
|
|
if (info.This()->InternalFieldCount() == 0) {
|
|
Nan::ThrowTypeError("Cannot instantiate without new");
|
|
}
|
|
|
|
Contour *contours;
|
|
contours = new Contour;
|
|
|
|
contours->Wrap(info.Holder());
|
|
info.GetReturnValue().Set(info.Holder());
|
|
}
|
|
|
|
Contour::Contour() :
|
|
Nan::ObjectWrap() {
|
|
}
|
|
|
|
NAN_METHOD(Contour::Point) {
|
|
Nan::HandleScope scope;
|
|
|
|
Contour *self = Nan::ObjectWrap::Unwrap<Contour>(info.This());
|
|
int pos = info[0].As<Number>()->Value();
|
|
int index = info[1].As<Number>()->Value();
|
|
|
|
cv::Point point = self->contours[pos][index];
|
|
|
|
Local<Object> data = Nan::New<Object>();
|
|
data->Set(Nan::GetCurrentContext(), Nan::New("x").ToLocalChecked(), Nan::New<Number>(point.x));
|
|
data->Set(Nan::GetCurrentContext(), Nan::New("y").ToLocalChecked(), Nan::New<Number>(point.y));
|
|
|
|
info.GetReturnValue().Set(data);
|
|
}
|
|
|
|
NAN_METHOD(Contour::Points) {
|
|
Nan::HandleScope scope;
|
|
|
|
Contour *self = Nan::ObjectWrap::Unwrap<Contour>(info.This());
|
|
int pos = info[0].As<Number>()->Value();
|
|
|
|
std::vector<cv::Point> points = self->contours[pos];
|
|
Local<Array> data = Nan::New<Array>(points.size());
|
|
|
|
for (std::vector<int>::size_type i = 0; i != points.size(); i++) {
|
|
Local<Object> point_data = Nan::New<Object>();
|
|
point_data->Set(Nan::GetCurrentContext(), Nan::New<String>("x").ToLocalChecked(), Nan::New<Number>(points[i].x));
|
|
point_data->Set(Nan::GetCurrentContext(), Nan::New<String>("y").ToLocalChecked(), Nan::New<Number>(points[i].y));
|
|
|
|
data->Set(Nan::GetCurrentContext(), i, point_data);
|
|
}
|
|
|
|
info.GetReturnValue().Set(data);
|
|
}
|
|
|
|
// FIXME: this should better be called "Length" as ``Contours`` is an Array like
|
|
// structure also, this would allow to use ``Size`` for the function returning
|
|
// the number of corners in the contour for better consistency with OpenCV.
|
|
NAN_METHOD(Contour::Size) {
|
|
Nan::HandleScope scope;
|
|
|
|
Contour *self = Nan::ObjectWrap::Unwrap<Contour>(info.This());
|
|
|
|
info.GetReturnValue().Set(Nan::New<Number>(self->contours.size()));
|
|
}
|
|
|
|
NAN_METHOD(Contour::CornerCount) {
|
|
Nan::HandleScope scope;
|
|
|
|
Contour *self = Nan::ObjectWrap::Unwrap<Contour>(info.This());
|
|
int pos = info[0].As<Number>()->Value();
|
|
|
|
info.GetReturnValue().Set(Nan::New<Number>(self->contours[pos].size()));
|
|
}
|
|
|
|
NAN_METHOD(Contour::Area) {
|
|
Nan::HandleScope scope;
|
|
|
|
Contour *self = Nan::ObjectWrap::Unwrap<Contour>(info.This());
|
|
int pos = info[0].As<Number>()->Value();
|
|
bool orientation = (info.Length() > 1 && info[1]->BooleanValue( v8::Isolate::GetCurrent() ));
|
|
|
|
// info.GetReturnValue().Set(Nan::New<Number>(contourArea(self->contours)));
|
|
info.GetReturnValue().Set(Nan::New<Number>(contourArea(cv::Mat(self->contours[pos]), orientation)));
|
|
}
|
|
|
|
NAN_METHOD(Contour::ArcLength) {
|
|
Nan::HandleScope scope;
|
|
|
|
Contour *self = Nan::ObjectWrap::Unwrap<Contour>(info.This());
|
|
int pos = info[0].As<Number>()->Value();
|
|
bool isClosed = info[1]->BooleanValue( v8::Isolate::GetCurrent() );
|
|
|
|
info.GetReturnValue().Set(Nan::New<Number>(arcLength(cv::Mat(self->contours[pos]), isClosed)));
|
|
}
|
|
|
|
NAN_METHOD(Contour::ApproxPolyDP) {
|
|
Nan::HandleScope scope;
|
|
|
|
Contour *self = Nan::ObjectWrap::Unwrap<Contour>(info.This());
|
|
int pos = info[0].As<Number>()->Value();
|
|
double epsilon = info[1].As<Number>()->Value();
|
|
bool isClosed = info[2]->BooleanValue( v8::Isolate::GetCurrent() );
|
|
|
|
cv::Mat approxed;
|
|
approxPolyDP(cv::Mat(self->contours[pos]), approxed, epsilon, isClosed);
|
|
approxed.copyTo(self->contours[pos]);
|
|
|
|
info.GetReturnValue().Set(Nan::Null());
|
|
}
|
|
|
|
NAN_METHOD(Contour::ConvexHull) {
|
|
Nan::HandleScope scope;
|
|
|
|
Contour *self = Nan::ObjectWrap::Unwrap<Contour>(info.This());
|
|
|
|
int pos = info[0].As<Number>()->Value();
|
|
bool clockwise = info[1]->BooleanValue( v8::Isolate::GetCurrent() );
|
|
|
|
cv::Mat hull;
|
|
cv::convexHull(cv::Mat(self->contours[pos]), hull, clockwise);
|
|
hull.copyTo(self->contours[pos]);
|
|
|
|
info.GetReturnValue().Set(Nan::Null());
|
|
}
|
|
|
|
NAN_METHOD(Contour::BoundingRect) {
|
|
Nan::HandleScope scope;
|
|
|
|
Contour *self = Nan::ObjectWrap::Unwrap<Contour>(info.This());
|
|
int pos = info[0].As<Number>()->Value();
|
|
|
|
cv::Rect bounding = cv::boundingRect(cv::Mat(self->contours[pos]));
|
|
Local<Object> rect = Nan::New<Object>();
|
|
|
|
rect->Set(Nan::GetCurrentContext(), Nan::New("x").ToLocalChecked(), Nan::New<Number>(bounding.x));
|
|
rect->Set(Nan::GetCurrentContext(), Nan::New("y").ToLocalChecked(), Nan::New<Number>(bounding.y));
|
|
rect->Set(Nan::GetCurrentContext(), Nan::New("width").ToLocalChecked(), Nan::New<Number>(bounding.width));
|
|
rect->Set(Nan::GetCurrentContext(), Nan::New("height").ToLocalChecked(), Nan::New<Number>(bounding.height));
|
|
|
|
info.GetReturnValue().Set(rect);
|
|
}
|
|
|
|
NAN_METHOD(Contour::MinAreaRect) {
|
|
Nan::HandleScope scope;
|
|
|
|
Contour *self = Nan::ObjectWrap::Unwrap<Contour>(info.This());
|
|
int pos = info[0].As<Number>()->Value();
|
|
|
|
cv::RotatedRect minimum = cv::minAreaRect(cv::Mat(self->contours[pos]));
|
|
|
|
Local<Object> rect = Nan::New<Object>();
|
|
rect->Set(Nan::GetCurrentContext(), Nan::New("angle").ToLocalChecked(), Nan::New<Number>(minimum.angle));
|
|
|
|
Local<Object> size = Nan::New<Object>();
|
|
size->Set(Nan::GetCurrentContext(), Nan::New("height").ToLocalChecked(), Nan::New<Number>(minimum.size.height));
|
|
size->Set(Nan::GetCurrentContext(), Nan::New("width").ToLocalChecked(), Nan::New<Number>(minimum.size.width));
|
|
rect->Set(Nan::GetCurrentContext(), Nan::New("size").ToLocalChecked(), size);
|
|
|
|
Local<Object> center = Nan::New<Object>();
|
|
center->Set(Nan::GetCurrentContext(), Nan::New("x").ToLocalChecked(), Nan::New<Number>(minimum.center.x));
|
|
center->Set(Nan::GetCurrentContext(), Nan::New("y").ToLocalChecked(), Nan::New<Number>(minimum.center.y));
|
|
|
|
v8::Local<v8::Array> points = Nan::New<Array>(4);
|
|
|
|
cv::Point2f rect_points[4];
|
|
minimum.points(rect_points);
|
|
|
|
for (unsigned int i=0; i<4; i++) {
|
|
Local<Object> point = Nan::New<Object>();
|
|
point->Set(Nan::GetCurrentContext(), Nan::New("x").ToLocalChecked(), Nan::New<Number>(rect_points[i].x));
|
|
point->Set(Nan::GetCurrentContext(), Nan::New("y").ToLocalChecked(), Nan::New<Number>(rect_points[i].y));
|
|
points->Set(Nan::GetCurrentContext(), i, point);
|
|
}
|
|
|
|
rect->Set(Nan::GetCurrentContext(), Nan::New("points").ToLocalChecked(), points);
|
|
|
|
info.GetReturnValue().Set(rect);
|
|
}
|
|
|
|
NAN_METHOD(Contour::FitEllipse) {
|
|
Nan::HandleScope scope;
|
|
|
|
Contour *self = Nan::ObjectWrap::Unwrap<Contour>(info.This());
|
|
int pos = info[0].As<Number>()->Value();
|
|
|
|
if (self->contours[pos].size() >= 5) { // Minimum number for an ellipse
|
|
cv::RotatedRect ellipse = cv::fitEllipse(cv::Mat(self->contours[pos]));
|
|
|
|
Local<Object> jsEllipse = Nan::New<Object>();
|
|
jsEllipse->Set(Nan::GetCurrentContext(), Nan::New("angle").ToLocalChecked(), Nan::New<Number>(ellipse.angle));
|
|
|
|
Local<Object> size = Nan::New<Object>();
|
|
size->Set(Nan::GetCurrentContext(), Nan::New("height").ToLocalChecked(), Nan::New<Number>(ellipse.size.height));
|
|
size->Set(Nan::GetCurrentContext(), Nan::New("width").ToLocalChecked(), Nan::New<Number>(ellipse.size.width));
|
|
jsEllipse->Set(Nan::GetCurrentContext(), Nan::New("size").ToLocalChecked(), size);
|
|
|
|
Local<Object> center = Nan::New<Object>();
|
|
center->Set(Nan::GetCurrentContext(), Nan::New("x").ToLocalChecked(), Nan::New<Number>(ellipse.center.x));
|
|
center->Set(Nan::GetCurrentContext(), Nan::New("y").ToLocalChecked(), Nan::New<Number>(ellipse.center.y));
|
|
jsEllipse->Set(Nan::GetCurrentContext(), Nan::New("center").ToLocalChecked(), center);
|
|
|
|
info.GetReturnValue().Set(jsEllipse);
|
|
}
|
|
|
|
info.GetReturnValue().Set(Nan::Null());
|
|
}
|
|
|
|
NAN_METHOD(Contour::IsConvex) {
|
|
Nan::HandleScope scope;
|
|
|
|
Contour *self = Nan::ObjectWrap::Unwrap<Contour>(info.This());
|
|
int pos = info[0].As<Number>()->Value();
|
|
|
|
info.GetReturnValue().Set(Nan::New<Boolean>(isContourConvex(cv::Mat(self->contours[pos]))));
|
|
}
|
|
|
|
NAN_METHOD(Contour::Moments) {
|
|
Nan::HandleScope scope;
|
|
|
|
Contour *self = Nan::ObjectWrap::Unwrap<Contour>(info.This());
|
|
int pos = info[0].As<Number>()->Value();
|
|
|
|
// Get the moments
|
|
cv::Moments mu = moments( self->contours[pos], false );
|
|
|
|
Local<Object> res = Nan::New<Object>();
|
|
|
|
res->Set(Nan::GetCurrentContext(), Nan::New("m00").ToLocalChecked(), Nan::New<Number>(mu.m00));
|
|
res->Set(Nan::GetCurrentContext(), Nan::New("m10").ToLocalChecked(), Nan::New<Number>(mu.m10));
|
|
res->Set(Nan::GetCurrentContext(), Nan::New("m01").ToLocalChecked(), Nan::New<Number>(mu.m01));
|
|
res->Set(Nan::GetCurrentContext(), Nan::New("m11").ToLocalChecked(), Nan::New<Number>(mu.m11));
|
|
|
|
info.GetReturnValue().Set(res);
|
|
}
|
|
|
|
NAN_METHOD(Contour::Hierarchy) {
|
|
Nan::HandleScope scope;
|
|
|
|
Contour *self = Nan::ObjectWrap::Unwrap<Contour>(info.This());
|
|
int pos = info[0]->IntegerValue( Nan::GetCurrentContext() ).ToChecked();
|
|
|
|
cv::Vec4i hierarchy = self->hierarchy[pos];
|
|
|
|
Local<Array> res = Nan::New<Array>(4);
|
|
|
|
res->Set(Nan::GetCurrentContext(),0, Nan::New<Number>(hierarchy[0]));
|
|
res->Set(Nan::GetCurrentContext(),1, Nan::New<Number>(hierarchy[1]));
|
|
res->Set(Nan::GetCurrentContext(),2, Nan::New<Number>(hierarchy[2]));
|
|
res->Set(Nan::GetCurrentContext(),3, Nan::New<Number>(hierarchy[3]));
|
|
|
|
info.GetReturnValue().Set(res);
|
|
}
|
|
|
|
NAN_METHOD(Contour::Serialize) {
|
|
Nan::HandleScope scope;
|
|
|
|
Contour *self = Nan::ObjectWrap::Unwrap<Contour>(info.This());
|
|
|
|
Local<Array> contours_data = Nan::New<Array>(self->contours.size());
|
|
|
|
for (std::vector<int>::size_type i = 0; i != self->contours.size(); i++) {
|
|
std::vector<cv::Point> points = self->contours[i];
|
|
Local<Array> contour_data = Nan::New<Array>(points.size());
|
|
|
|
for (std::vector<int>::size_type j = 0; j != points.size(); j++) {
|
|
Local<Array> point_data = Nan::New<Array>(2);
|
|
point_data->Set(Nan::GetCurrentContext(),0, Nan::New<Number>(points[j].x));
|
|
point_data->Set(Nan::GetCurrentContext(),1, Nan::New<Number>(points[j].y));
|
|
|
|
contour_data->Set(Nan::GetCurrentContext(),j, point_data);
|
|
}
|
|
contours_data->Set(Nan::GetCurrentContext(), i, contour_data);
|
|
}
|
|
|
|
Local<Array> hierarchy_data = Nan::New<Array>(self->hierarchy.size());
|
|
for (std::vector<int>::size_type i = 0; i != self->hierarchy.size(); i++) {
|
|
Local<Array> contour_data = Nan::New<Array>(4);
|
|
contour_data->Set(Nan::GetCurrentContext(),0, Nan::New<Number>(self->hierarchy[i][0]));
|
|
contour_data->Set(Nan::GetCurrentContext(),1, Nan::New<Number>(self->hierarchy[i][1]));
|
|
contour_data->Set(Nan::GetCurrentContext(),2, Nan::New<Number>(self->hierarchy[i][2]));
|
|
contour_data->Set(Nan::GetCurrentContext(),3, Nan::New<Number>(self->hierarchy[i][3]));
|
|
|
|
hierarchy_data->Set(Nan::GetCurrentContext(), i, contour_data);
|
|
}
|
|
|
|
Local<Object> data = Nan::New<Object>();
|
|
data->Set(Nan::GetCurrentContext(), Nan::New<String>("contours").ToLocalChecked(), contours_data);
|
|
data->Set(Nan::GetCurrentContext(), Nan::New<String>("hierarchy").ToLocalChecked(), hierarchy_data);
|
|
|
|
info.GetReturnValue().Set(data);
|
|
}
|
|
|
|
NAN_METHOD(Contour::Deserialize) {
|
|
Nan::HandleScope scope;
|
|
|
|
Contour *self = Nan::ObjectWrap::Unwrap<Contour>(info.This());
|
|
|
|
Local<Object> data = Local<Object>::Cast(info[0]);
|
|
|
|
Local<Array> contours_data = Local<Array>::Cast(data->Get(Nan::GetCurrentContext(),Nan::New<String>("contours").ToLocalChecked()).ToLocalChecked());
|
|
Local<Array> hierarchy_data = Local<Array>::Cast(data->Get(Nan::GetCurrentContext(),Nan::New<String>("hierarchy").ToLocalChecked()).ToLocalChecked());
|
|
|
|
std::vector<std::vector<cv::Point> > contours_res;
|
|
int contours_length = contours_data->Length();
|
|
|
|
for (int i = 0; i < contours_length; i++) {
|
|
Local<Array> contour_data = Local<Array>::Cast(contours_data->Get(Nan::GetCurrentContext(),i).ToLocalChecked());
|
|
std::vector<cv::Point> points;
|
|
|
|
int contour_length = contour_data->Length();
|
|
for (int j = 0; j < contour_length; j++) {
|
|
Local<Array> point_data = Local<Array>::Cast(contour_data->Get(Nan::GetCurrentContext(),j).ToLocalChecked());
|
|
int x = point_data->Get(Nan::GetCurrentContext(),0).ToLocalChecked()->IntegerValue( Nan::GetCurrentContext() ).ToChecked();
|
|
int y = point_data->Get(Nan::GetCurrentContext(),1).ToLocalChecked()->IntegerValue( Nan::GetCurrentContext() ).ToChecked();
|
|
points.push_back(cv::Point(x, y));
|
|
}
|
|
|
|
contours_res.push_back(points);
|
|
}
|
|
|
|
std::vector<cv::Vec4i> hierarchy_res;
|
|
int hierarchy_length = hierarchy_data->Length();
|
|
|
|
for (int i = 0; i < hierarchy_length; i++) {
|
|
Local<Array> contour_data = Local<Array>::Cast(hierarchy_data->Get(Nan::GetCurrentContext(),i).ToLocalChecked());
|
|
int a = contour_data->Get(Nan::GetCurrentContext(),0).ToLocalChecked()->IntegerValue( Nan::GetCurrentContext() ).ToChecked();
|
|
int b = contour_data->Get(Nan::GetCurrentContext(),1).ToLocalChecked()->IntegerValue( Nan::GetCurrentContext() ).ToChecked();
|
|
int c = contour_data->Get(Nan::GetCurrentContext(),2).ToLocalChecked()->IntegerValue( Nan::GetCurrentContext() ).ToChecked();
|
|
int d = contour_data->Get(Nan::GetCurrentContext(),3).ToLocalChecked()->IntegerValue( Nan::GetCurrentContext() ).ToChecked();
|
|
hierarchy_res.push_back(cv::Vec4i(a, b, c, d));
|
|
}
|
|
|
|
self->contours = contours_res;
|
|
self->hierarchy = hierarchy_res;
|
|
|
|
info.GetReturnValue().Set(Nan::Null());
|
|
}
|