Proof of concept of detecting edge in a 2 bit bitmap image

edge-detect-demo.cpp

#include <cstdlib>
#include <iostream>

using namespace std;

/*
 * 
 */
int main(int argc, char** argv) {
    
    int bitmapImage[3][10] = { { 0, 1, 1, 1, 1, 1, 0, 0, 0, 0 },
                               { 0, 1, 1, 1, 1, 1, 1, 1, 1, 0 },
                               { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 } };
    
    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 10; j++) {
            cout << bitmapImage[i][j] << " ";
        }
        cout << endl;
    }
    
    for (int i = 0; i < 3; i++) {
        bool flipped = false;
        for (int j = 0; j < 8; j++) {
            if (bitmapImage[i][j+1] == 1 && bitmapImage[i][j+2] == 1) {
                if (flipped == true && (bitmapImage[i][j] == 0)) { 
                    // check for 011 and flipped true, i.e. again 111
                    bitmapImage[i][j+1] = 0;
                    flipped = true;
                } else if (flipped == false && (bitmapImage[i][j] == 1)) { 
                    //flipped = false so check for 111
                    bitmapImage[i][j+1] = 0;
                    flipped = true;
                } else { 
                    // u did nothing, so set flipped to false
                    flipped = false;
                }
            } else {
                // u did nothing, so set flipped to false
                flipped = false;
            }         
        }
    }
    
    cout << "After change" << endl;
    
    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 10; j++) {
            cout << bitmapImage[i][j] << " ";
        }
        cout << endl;
    }

    return 0;
}