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#ifndef CAFFE2_VIDEO_OPTICAL_FLOW_H_
#define CAFFE2_VIDEO_OPTICAL_FLOW_H_
#include <opencv2/core.hpp>
#include <opencv2/highgui.hpp>
#include <opencv2/opencv.hpp>
#include <opencv2/video.hpp>
#include <caffe2/core/logging.h>
namespace caffe2 {
// Four different types of optical flow algorithms supported;
// BroxOpticalFlow doesn't have a CPU version;
// DensePyrLKOpticalFlow only has sparse CPU version;
enum FLowAlgType {
FarnebackOpticalFlow = 0,
DensePyrLKOpticalFlow = 1,
BroxOpticalFlow = 2,
OpticalFlowDual_TVL1 = 3,
};
// Define different types of optical flow data type
// 0: original two channel optical flow
// 1: three channel optical flow with magnitude as the third channel
// 2: two channel optical flow + one channel gray
// 3: two channel optical flow + three channel rgb
enum FlowDataType {
Flow2C = 0,
Flow3C = 1,
FlowWithGray = 2,
FlowWithRGB = 3,
};
void OpticalFlowExtractor(
const cv::Mat& prev_gray,
const cv::Mat& curr_gray,
const int optical_flow_alg_type,
cv::Mat& flow);
void MergeOpticalFlow(cv::Mat& prev_flow, const cv::Mat& curr_flow);
void MultiFrameOpticalFlowExtractor(
const std::vector<cv::Mat>& grays,
const int optical_flow_alg_type,
cv::Mat& flow);
} // namespace caffe2
#endif // CAFFE2_VIDEO_OPTICAL_FLOW_H_
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