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Basic Stitcher.cpp
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Basic Stitcher.cpp
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// Prototype.cpp : Defines the entry point for the console application.
#include <iostream>
#include <fstream>
#include "opencv2/imgcodecs.hpp"
#include "opencv2/highgui.hpp"
#include "opencv2/stitching.hpp"
#include <sstream>
#include <string.h>
using namespace cv;
using namespace std;
bool check_row(Mat image, int y, Rect roi) //returns true if black pixels found
{
int black_count = 0;
for (int x = roi.x; x < roi.width; x++)
{
Scalar intensity = image.at<uchar>(y, x);
if (intensity.val[0] == 0)
{
black_count++;
}
if (black_count>0)
{
return true;
}
}
return false;
}
bool check_col(Mat image, int x, Rect roi) //returns true if black pixels found
{
int black_count = 0;
for (int y = roi.y; y < roi.height; y++)
{
Scalar intensity = image.at<uchar>(y, x);
if (intensity.val[0] == 0)
{
black_count++;
}
if (black_count>0)
{
return true;
}
}
return false;
}
void cropper(Mat &src, Mat &dest)
{
//Crops all blank/black pixels from image borders
//Minimum area cropped per call = 2x+2y pixels
//Preserving backup of original input image
Mat original = src;
//Convert input image to gray
cvtColor(src, src, CV_BGR2GRAY);
//Initialize ROI
Rect roi(0, 0, src.cols, src.rows);
while (1)
{
//Check edges for black/blank pixels
bool left_edge = check_col(src, roi.x, roi);
bool bottom_edge = check_row(src, roi.y + roi.height - 1, roi);
bool right_edge = check_col(src, roi.x + roi.width - 1, roi);
bool top_edge = check_row(src, roi.y, roi);
if (!(left_edge || bottom_edge || right_edge || top_edge))
{
//Shrinking each edge of ROI by 1 pixel width
//To compensate for black/blank pixels lying on ROI boundary
roi.x++;
roi.y++;
roi.height--;
roi.width--;
//Extracting ROI
dest = original(roi);
break;
}
if (left_edge)
{
roi.x++;
roi.width--;
}
if (bottom_edge)
{
roi.height--;
}
if (right_edge)
{
roi.width--;
}
if (top_edge)
{
roi.y++;
roi.height--;
}
}
}
int main()
{
//Set GPU flag
bool try_use_gpu = false;
Stitcher::Mode mode = Stitcher::SCANS;
//Set total image count and row length
int total_images = 2;
int row_length = 2;
//Calculate number of rows
//int no_of_rows = (total_images / row_length);
int no_of_rows = 1;
//Create a vector to store input images
vector <Mat> inputs;
string input_folder = "/home/atul/DeWinter/Stitcher/data3";
for (int i = 1; i <= 2; i++)
{
string path = input_folder;
path.append("/");
stringstream ss;
ss << i;
string str = ss.str();
path.append(str);
path.append(".jpg");
Mat temp = imread(path);
inputs.push_back(temp);
}
cout << "Loaded all input images to inputs vector...";
//Create a vector to store rows
vector <Mat> rows;
for (int i = 0; i < no_of_rows*row_length; i = i + row_length)
{
vector <Mat> desk; //vector that stores stiched result and next image to be stiched (never more than 2 elements)
Mat temp_row = inputs[i];
desk.push_back(temp_row);
cout << "\n" << i << " ";
for (int j = i + 1; j < i + row_length; j++)
{
cout << j << " ";
desk.push_back(inputs[j]);
Ptr<Stitcher> stitcher = Stitcher::create(mode, try_use_gpu);
Stitcher::Status status = stitcher->stitch(desk, temp_row);
//Stitcher stitcher = Stitcher::createDefault(false);
//Stitcher::Status status = stitcher.stitch(desk, temp_row);
if (status != Stitcher::OK)
{
cout << "\nUnable to perform stitching...";
cout << "\nError code: " << status;
getchar();
return 1;
}
desk.clear();
desk.push_back(temp_row);
//imshow("temp_row", temp_row); waitKey(0); destroyWindow("temp_row");
}
rows.push_back(temp_row);
}
cout << "\nGeneration of rows complete...";
///*
//Display and/or write all stitched rows
for (int a = 0; a < rows.size(); a++)
{
//imshow("Individual Rows", rows[a]); waitKey(0);
string dest_path = "/home/atul/DeWinter/Stitcher/";
dest_path.append("");
stringstream ss;
ss << a;
string str = ss.str();
dest_path.append(str);
dest_path.append(".jpg");
imwrite(dest_path, rows[a]);
}
//*/
//All rows generated at this point
//Stitching all rows together
///*
vector <Mat> desk;
Mat temp_result = rows[0];
desk.push_back(temp_result);
for (int i = 1; i < no_of_rows; i++)
{
desk.push_back(rows[i]);
Ptr<Stitcher> stitcher = Stitcher::create(mode, try_use_gpu);
//Stitcher stitcher = Stitcher::create(mode,try_use_gpu);
Stitcher::Status status = stitcher->stitch(desk, temp_result);
//Stitcher::Status status = stitcher.stitch(desk, temp_result);
cropper(temp_result, temp_result);
desk.clear();
desk.push_back(temp_result);
//imshow("temp_result", temp_result); waitKey(0); destroyWindow("temp_result");
}
string dest_path = "/home/atul/final.jpg";
imwrite(dest_path, temp_result);
//*/
//getchar();
return 0;
}