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imageTools.cpp
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imageTools.cpp
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#include <iostream>
#include <string>
#include <cmath>
#include <opencv2/opencv.hpp>
using namespace cv;
using namespace std;
int* imageToMat(string filename, int* dims){
Mat image;
image = imread(filename, CV_LOAD_IMAGE_COLOR);
Mat gray_image;
cvtColor(image, gray_image, CV_BGR2GRAY);
// Check for invalid input
if (!image.data)
{
cout << "Could not open or find the image" << std::endl ;
int* temp;
return temp;
}
int width = gray_image.size().width;
int height = gray_image.size().height;
dims[0] = height;
dims[1] = width;
cout << "Height: " << dims[0] << endl;
cout << "Width : " << dims[1] << endl;
//namedWindow( "Original Image", WINDOW_AUTOSIZE );// Create a window for display.
//imshow( "Original Image", gray_image ); // Show our image inside it.
//allocate 2d array
int *matrix;
matrix = (int*) malloc(height*width*sizeof(*matrix));
for (int i = 0; i < height; i++){
for(int j = 0; j < width; j++){
int intensity = gray_image.at<uchar>(i,j);
if (intensity > 254) {
intensity = 254;
}
if (intensity < 0) {
intensity = 0;
}
matrix[i*width+j] = intensity;
}
}
return matrix;
}
void matToImage(string filename, int* mat, int* dims){
int height = dims[0];
int width = dims[1];
Mat image(height, width, CV_8UC1, Scalar(0,0,0));
for(int i = 0; i < height; i++){
for(int j = 0; j < width; j++){
image.at<uchar>(i,j) = (int) mat[i*width+j];
}
}
//namedWindow( "Processed Image", WINDOW_AUTOSIZE );// Create a window for display.
//imshow( "Processed Image", image ); // Show our image inside it.
imwrite(filename, image);
//waitKey(0); // Wait for a keystroke in the window
return;
}