From: Antonio Ospite <ao2@ao2.it>
Date: Sat, 10 Oct 2020 16:47:04 +0000 (+0200)
Subject: Port to OpenCV4 and use the C++ API for everything
X-Git-Url: https://git.ao2.it/experiments/opencv_trail_effect.git/commitdiff_plain/9c0fa72ef05f2cc8dde373376b733b6b67e76e97

Port to OpenCV4 and use the C++ API for everything
---

diff --git a/Makefile b/Makefile
index 4e316b9..75dde40 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-CXXFLAGS = -ansi -pedantic -pedantic-errors -Wall -g3 -O2 -D_ANSI_SOURCE_
+CXXFLAGS = -std=c++11 -pedantic -pedantic-errors -Wall -g3 -O2 -D_ANSI_SOURCE_
 CXXFLAGS += -fno-common \
 	    -fvisibility=hidden \
 	    -Wall \
@@ -34,8 +34,8 @@ ifeq ($(COMPILER), clang)
   LDFLAGS += -Qunused-arguments
 endif
 
-CXXFLAGS += $(shell pkg-config --cflags opencv)
-LDLIBS += $(shell pkg-config --libs opencv)
+CXXFLAGS += $(shell pkg-config --cflags opencv4)
+LDLIBS += $(shell pkg-config --libs opencv4)
 
 LINK.o = $(LINK.cpp)
 opencv_trail_effect:
diff --git a/Segmentation.hpp b/Segmentation.hpp
index 5e87326..9ad76d7 100644
--- a/Segmentation.hpp
+++ b/Segmentation.hpp
@@ -51,8 +51,8 @@ public:
 		cv::Mat gray_frame;
 		cv::Mat frame_mask;
 
-		cvtColor(frame, gray_frame, CV_RGB2GRAY);
-		cv::threshold(gray_frame, frame_mask, threshold, 255, CV_THRESH_TOZERO);
+		cvtColor(frame, gray_frame, cv::COLOR_RGB2GRAY);
+		cv::threshold(gray_frame, frame_mask, threshold, 255, cv::THRESH_TOZERO);
 
 		return frame_mask;
 	}
@@ -84,7 +84,7 @@ public:
 		pMOG2->apply(frame, foreground_mask, 0);
 		cv::erode(foreground_mask, foreground_mask, cv::Mat());
 		cv::dilate(foreground_mask, foreground_mask, cv::Mat());
-		cv::threshold(foreground_mask, foreground_mask, 0, 255, CV_THRESH_OTSU);
+		cv::threshold(foreground_mask, foreground_mask, 0, 255, cv::THRESH_OTSU);
 		cv::medianBlur(foreground_mask, foreground_mask, 9);
 
 		return foreground_mask;
diff --git a/opencv_trail_effect.cpp b/opencv_trail_effect.cpp
index 6c0d09c..357cc42 100644
--- a/opencv_trail_effect.cpp
+++ b/opencv_trail_effect.cpp
@@ -142,15 +142,15 @@ int main(int argc, char *argv[])
 		goto out;
 	}
 
-	frame_size = cv::Size((int) inputVideo.get(CV_CAP_PROP_FRAME_WIDTH),
-			      (int) inputVideo.get(CV_CAP_PROP_FRAME_HEIGHT));
+	frame_size = cv::Size((int) inputVideo.get(cv::CAP_PROP_FRAME_WIDTH),
+			      (int) inputVideo.get(cv::CAP_PROP_FRAME_HEIGHT));
 
 	if (output_file) {
-		int fps = inputVideo.get(CV_CAP_PROP_FPS);
+		int fps = inputVideo.get(cv::CAP_PROP_FPS);
 		if (fps < 0)
 			fps = 25;
 
-		outputVideo.open(*output_file, CV_FOURCC('M','J','P','G'), fps, frame_size, true);
+		outputVideo.open(*output_file, cv::VideoWriter::fourcc('M','J','P','G'), fps, frame_size, true);
 		if (!outputVideo.isOpened()) {
 			std::cerr  << "Could not open the output video for write." << std::endl;
 			ret = -1;
@@ -176,7 +176,7 @@ int main(int argc, char *argv[])
 	if (*segmentation_method == "background") {
 		segmentation = new MOG2Segmentation(inputVideo, background_learn_frames);
 		if (show_background) {
-			cv::Mat background(frame_size, inputVideo.get(CV_CAP_PROP_FORMAT));
+			cv::Mat background(frame_size, inputVideo.get(cv::CAP_PROP_FORMAT));
 
 			((MOG2Segmentation *)segmentation)->getBackgroundImage(background);
 			trail->setBackground(background);
@@ -191,7 +191,7 @@ int main(int argc, char *argv[])
 		goto out_delete_trail;
 	}
 
-	cv::namedWindow("Frame", CV_WINDOW_NORMAL);
+	cv::namedWindow("Frame", cv::WINDOW_NORMAL);
 
 	for (;;) {
 		inputVideo >> input_frame;