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#pragma once
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#include <opencv2/core.hpp>
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#include <opencv2/imgproc.hpp>
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#include "../vp_node.h"
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namespace vp_nodes {
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// on screen display(short as osd) node.
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// another version for vp_frame_face_target display, including displaying similarity between faces.
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class vp_face_osd_node_v2: public vp_node
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{
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private:
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// leave a gap at the bottom of osd frame
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int gap_height = 112;
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int padding = 5;
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// cache for display
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cv::Mat the_baseline_face; // the first face detected in frames
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std::vector<float> the_baseline_face_feature; // the feature of first face in frames
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std::vector<cv::Mat> faces_list; // faces detected except the first one
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std::vector<std::vector<float>> face_features; // face features except the first one
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std::vector<float> cosine_distances; // cosine distance between face and the first one
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std::vector<float> l2_distances; // l2 distance between face and the first one
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double cosine_similar_thresh = 0.363; // higher value means higher similarity, max 1.0
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double l2norm_similar_thresh = 1.128; // lower value means higher similarity, min 0.0
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// calculate distance
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// 0 cosine distance
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// 1 l2 distance
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double match(std::vector<float>& feature1, std::vector<float>& feature2, int dis_type);
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protected:
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virtual std::shared_ptr<vp_objects::vp_meta> handle_frame_meta(std::shared_ptr<vp_objects::vp_frame_meta> meta) override;
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public:
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vp_face_osd_node_v2(std::string node_name);
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~vp_face_osd_node_v2();
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};
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}
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