OpenCV cv::gpu::SURF_GPU & cv::gpu::BruteForceMatcher_GPU sample

curf_gpu.cpp

#include <SDKDDKVer.h>
#include <Windows.h>

#pragma warning(disable:4819)
#pragma warning(disable:4996)

// for OpenCV2
#include "opencv2/imgproc/imgproc.hpp"
#include "opencv2/objdetect/objdetect.hpp"
#include "opencv2/gpu/gpu.hpp"
#include "opencv2/highgui/highgui.hpp"

#ifdef _DEBUG
#pragma comment(lib, "opencv_core231d.lib")
#pragma comment(lib, "opencv_imgproc231d.lib")
#pragma comment(lib, "opencv_objdetect231d.lib")
#pragma comment(lib, "opencv_gpu231d.lib")
#pragma comment(lib, "opencv_features2d231d.lib")
#pragma comment(lib, "opencv_highgui231d.lib")
#else
#pragma comment(lib, "opencv_core231.lib")
#pragma comment(lib, "opencv_imgproc231.lib")
#pragma comment(lib, "opencv_objdetect231.lib")
#pragma comment(lib, "opencv_objdetect231d.lib")
#pragma comment(lib, "opencv_gpu231.lib")
#pragma comment(lib, "opencv_features2d231.lib")
#pragma comment(lib, "opencv_highgui231.lib")
#endif

int main(int argc, char* argv[])
{
	cv::Mat src_img, template_img;
	cv::Mat result_mat;
	cv::Mat debug_img;

	template_img = cv::imread("..\\img\\lena_face.png", CV_LOAD_IMAGE_GRAYSCALE);
	if (template_img.data == NULL) {
		printf("cv::imread() failed...\n");
		return -1;
	}

	src_img = cv::imread("..\\img\\lena.png", CV_LOAD_IMAGE_GRAYSCALE);
	if (src_img.data == NULL) {
		printf("cv::imread() failed...\n");
		return -1;
	}

	cv::gpu::GpuMat src_gpu, template_gpu;
	cv::gpu::GpuMat src_keypoints_gpu, src_descriptors_gpu;
    cv::gpu::GpuMat template_keypoints_gpu, template_descriptors_gpu;
	cv::gpu::SURF_GPU surf;

	std::vector<cv::KeyPoint> src_keypoints, template_keypoints;
	std::vector<float> src_descriptors, template_descriptors;
	std::vector<std::vector<cv::DMatch>> matches;

	while(true) {
		// GPUへ画像をアップロード
		src_gpu.upload(src_img);
		template_gpu.upload(template_img);

		// 特徴点の抽出
		surf(src_gpu, cv::gpu::GpuMat(), src_keypoints_gpu, src_descriptors_gpu, false);
		surf(template_gpu, cv::gpu::GpuMat(), template_keypoints_gpu, template_descriptors_gpu, false);

		// GPUから結果を取り出す
		surf.downloadKeypoints(src_keypoints_gpu, src_keypoints);
		surf.downloadKeypoints(template_keypoints_gpu, template_keypoints);
		surf.downloadDescriptors(src_descriptors_gpu, src_descriptors);
		surf.downloadDescriptors(template_descriptors_gpu, template_descriptors);

		// 2つの特徴点のうち、一致する特徴点を探す
		cv::gpu::BruteForceMatcher_GPU<cv::L2<float>> matcher;
		cv::gpu::GpuMat trainIdx, distance;
		matcher.radiusMatch(src_descriptors_gpu, template_descriptors_gpu, matches, 0.1f);

		// 描画
		cv::drawMatches(src_img, src_keypoints, template_img, template_keypoints, matches, debug_img);

		cv::imshow("debug_img", debug_img);

		int c = cv::waitKey(1);
		if (c == 27) break;
	}

	return 0;
}