Blending.cpp

//
// Created by stephan on 03.04.19.
//

#include "Blending.h"

cv::Mat Blending::blend() {
    double alpha = 0.5; double beta;

    cv::Mat src1, src2, dst;

    src1 = cv::imread("img/test.jpg");
    src2 = cv::imread("img/test2.jpg");

    if( !src1.data ) { printf("Error loading src1 \n"); return src1; }
    if( !src2.data ) { printf("Error loading src2 \n"); return src1; }

    /// Create Windows
    //cv::namedWindow("Linear Blend", 1);

    int width, height;
    if(src1.cols > src2.cols) width = src1.cols;
    else width = src2.cols;

    if(src1.rows > src2.rows) height = src1.rows;
    else height = src2.rows;

    cv::Mat img1(height, width, CV_8UC3, cv::Scalar(0, 0, 0));
    src1.copyTo(img1(cv::Rect(0,0,src1.cols, src1.rows)));

    int min_x = ( img1.cols - src2.cols)/2;
    int min_y = ( img1.rows - src2.rows)/2;

    cv::Rect roi = cv::Rect(min_x, min_y, src2.cols, src2.rows);
    cv::Mat out_image = img1.clone();
    cv::Mat A_roi= img1(roi);
    cv::Mat out_image_roi = out_image(roi);
    beta = ( 1.0 - alpha );

    cv::addWeighted(A_roi,alpha,src2, beta,0.0,out_image_roi);
    //imshow( "Linear Blend", out_image_roi );
    return out_image_roi;
}