Binarization threshold

Five types of binarization threshold value

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 Code:

 

#include <opencv2/opencv.hpp>
#include <iostream>
#include <math.h>

using namespace cv;
Mat src, gray_src, dst;
int threshold_value = 127;
int threshold_max = 255;
int type_value = 2;
int type_max = 4;
const char* output_title = "binary image";
void Threshold_Demo(int, void*);
int main(int argc, char** argv) {
    src = imread("L:/4.jpg");
    if (!src.data) {
        printf("could not load image...\n");
        return -1;
    }
    namedWindow("input image", CV_WINDOW_AUTOSIZE);
    namedWindow(output_title, CV_WINDOW_AUTOSIZE);
    imshow("input image", src);

    createTrackbar("Threshold Value:", output_title, &threshold_value, threshold_max, Threshold_Demo); 
    createTrackbar ( " the Type the Value: " , output_title, & type_value, type_max, Threshold_Demo);
     // Parameter: 1 2 slidably attached to the sliding space name of the name of the image window 4. 3. Initialize threshold slide control the scale range scale callback hreshold_Demo 
    Threshold_Demo ( 0 , 0 ); 

    waitKey ( 0 );
     return  0 ; 
} 

void Threshold_Demo ( int , void * ) { 
    cvtColor (the src, gray_src, CV_BGR2GRAY); 
    threshold (gray_src, DST, threshold_value , threshold_max, type_value);   //Type_value displayed by selecting five methods
     // threshold (gray_src, DST, threshold_value, threshold_max, THRESH_BINARY); the first method of THRESH_ 
    imshow (output_title, DST); 
}

 

Original:

 

 result: