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Diffstat (limited to 'ftnoir_tracker_pt/point_extractor.cpp')
-rw-r--r-- | ftnoir_tracker_pt/point_extractor.cpp | 96 |
1 files changed, 0 insertions, 96 deletions
diff --git a/ftnoir_tracker_pt/point_extractor.cpp b/ftnoir_tracker_pt/point_extractor.cpp deleted file mode 100644 index 09be967a..00000000 --- a/ftnoir_tracker_pt/point_extractor.cpp +++ /dev/null @@ -1,96 +0,0 @@ -/* Copyright (c) 2012 Patrick Ruoff - * - * Permission to use, copy, modify, and/or distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - */ - -#include "point_extractor.h" -#include <QDebug> - -using namespace cv; -using namespace std; - -// ---------------------------------------------------------------------------- -const vector<Vec2f>& PointExtractor::extract_points(Mat frame, float dt, bool draw_output) -{ - const int W = frame.cols; - const int H = frame.rows; - - // clear old points - points.clear(); - - // convert to grayscale - Mat frame_grey; - cvtColor(frame, frame_grey, COLOR_BGR2GRAY); - - // convert to binary - Mat frame_bin; - threshold(frame_grey, frame_bin, threshold_val, 255, THRESH_BINARY); - - unsigned int region_size_min = 3.14*min_size*min_size; - unsigned int region_size_max = 3.14*max_size*max_size; - - int blob_index = 1; - for (int y=0; y<H; y++) - { - for (int x=0; x<W; x++) - { - // find connected components with floodfill - if (frame_bin.at<unsigned char>(y,x) != 255) continue; - Rect rect; - floodFill(frame_bin, Point(x,y), Scalar(blob_index), &rect, Scalar(0), Scalar(0), FLOODFILL_FIXED_RANGE); - blob_index++; - - // calculate the size of the connected component - unsigned int region_size = 0; - for (int i=rect.y; i < (rect.y+rect.height); i++) - { - for (int j=rect.x; j < (rect.x+rect.width); j++) - { - if (frame_bin.at<unsigned char>(i,j) != blob_index-1) continue; - region_size++; - } - } - - if (region_size < region_size_min || region_size > region_size_max) continue; - - // calculate the center of mass: - // mx = (sum_ij j*f(frame_grey_ij)) / (sum_ij f(frame_grey_ij)) - // my = ... - // f maps from [threshold,256] -> [0, 1], lower values are mapped to 0 - float m = 0; - float mx = 0; - float my = 0; - for (int i=rect.y; i < (rect.y+rect.height); i++) - { - for (int j=rect.x; j < (rect.x+rect.width); j++) - { - if (frame_bin.at<unsigned char>(i,j) != blob_index-1) continue; - float val = frame_grey.at<unsigned char>(i,j); - val = float(val - threshold_val)/(256 - threshold_val); - val = val*val; // makes it more stable (less emphasis on low values, more on the peak) - m += val; - mx += j * val; - my += i * val; - } - } - - // convert to centered camera coordinate system with y axis upwards - Vec2f c; - c[0] = (mx/m - W/2)/W; - c[1] = -(my/m - H/2)/W; - points.push_back(c); - - if (blob_index >= 255) break; - } - if (blob_index >= 255) break; - } - - // draw output image - if (draw_output) { - frame.setTo(Scalar(255,0,0), frame_bin); - } - - return points; -} |