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Exercises_9_5.cpp
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Exercises_9_5.cpp
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//Exercises_9_5.cpp Exercises at end of Chapter 9
#include <opencv2/opencv.hpp>
#include <iostream>
using namespace cv;
using namespace std;
void help(const char **argv) {
cout << "\n\n"
<< "This program solves the Exercise 4、5 at the end of Chapter 9 \n"
<< "Call:\n"
<< argv[0] << " <path/image_name1>" << " <path/image_name2>\n\n"
<< "For example: ./" << argv[0] << " ../left.jpg "<< " ../left.jpg\n"
<< endl;
}
int main( int argc, const char** argv )
{
help(argv);
if(argc < 3) {
cout << "\nERROR: You had too few parameters.\n" << endl;
return -1;
}
Mat temp;
Mat temp2;
/************************************************************************/
/* 5. Create an outline of an object. Take a picture of a scene. Then, without moving
the camera, put a coffee cup in the scene and take a second picture. Load these
images and convert both to 8-bit grayscale images.
a. Take the absolute value of their difference. Display the result, which should
look like a noisy mask of a coffee mug.
b. Do a binary threshold of the resulting image using a level that preserves most
of the coffee mug but removes some of the noise. Display the result. The “on”
values should be set to 255.
c. Do a cv::MOP_OPEN on the image to further clean up noise.
d. Using the erosion operator and logical XOR function, turn the mask of the
coffee cup image into an outline of the coffee cup (only the edge pixels
remaining). */
/************************************************************************/
Mat matMug = imread(argv[1],IMREAD_GRAYSCALE);
Mat matNoMug = imread(argv[2],IMREAD_GRAYSCALE);
if (matMug.empty() || matNoMug.empty())
{
cout << "\nERROR: parameters is not a image name.\n" << endl;
return -1;
}
//a
absdiff(matMug,matNoMug,temp);
imshow("absolute value of mug ",temp);
//b
threshold(temp,temp,100,255,THRESH_OTSU);
imshow("a binary threshold",temp);
//c
morphologyEx(temp,temp,cv::MORPH_OPEN,Mat());
imshow("MORPH_OPEN",temp);
//d
erode(temp,temp,Mat());
matMug.copyTo(temp2,temp);
imshow("an outline of the coffee cup",temp2);
waitKey();
return 0;
}