43 lines
819 B
C++
43 lines
819 B
C++
#include "histo.h"
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#include "opencv2/imgcodecs.hpp"
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#include "opencv2/videoio.hpp"
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#include <opencv2/core.hpp>
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#include <opencv2/highgui.hpp>
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#include <opencv2/imgproc.hpp>
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#include <iostream>
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using namespace cv;
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int calc_th(Mat img, float fg_ratio = 0.1f){
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int nfg = img.cols * img.rows * fg_ratio;
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Mat histo;
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Histo::calcHistoC1(img, histo);
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double s = 0;
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int th = 0;
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for(; th < 256; th++){
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s += histo.at<int>(th);
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if(s >= nfg){
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return th;
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}
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}
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return -1;
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}
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int main(){
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Mat img = imread("../scanned3.png", IMREAD_GRAYSCALE);
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int th = calc_th(img, 0.1f);
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Mat mask;
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if(th != -1){
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threshold(img, mask, th, 255, THRESH_BINARY);
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imshow("img2", mask);
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}
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while(waitKey(3) != 'q');
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return 0;
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}
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