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Merging two images showing brightness

asked 2014-05-13 15:02:09 -0500

FLY gravatar image

updated 2014-05-23 08:36:58 -0500

I am trying to blend two image or you can say put one image on other image , when i apply blending overlay on the image or simple merge two image it show me brightness in it.

here are my two images (first image is empty from inside like PS vignette)

and the other is

The code which i did is

int main( int argc, char** argv )
{
    Mat img=imread("E:\\vig.png",-1); 
    Mat ch[4]; 
    split(img,ch);
    Mat im2 = ch[3];              // here's the vignette
    im2 = 255 - im2; // eventually cure the inversion
    Mat img2 = imread("E:\\ew.jpg");
    Mat out2;
    blending_overlay3(img2 , im2 , out2);
    imshow("image",out2);
    imwrite("E:\\image.jpg",out2);
    waitKey();}

It show me the result like

but i require result like

EDIT

The first image is hollow/empty from center (the vignette one) , but when i read the image (vignette one) with my program then it become solid(bright) from the center , the history behind its implementation is here

There is the only problem and its with first (vignette) image reading , if it read as it is , like hollow/empty from the center , so that the other image with which we merge/blend/weight whatever apply it didn't effect the center part of the image , not even show brightness etc , that's what i want to do

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answered 2014-05-26 03:59:01 -0500

FLY gravatar image

Let me answer my own question from knowledge of others and other visitors ease . The answer i got from here by @Andrey Somorodov , below program will give you your required result and requirement

#include <iostream>
#include <vector>
#include <stdio.h>
#include <functional>
#include <algorithm>
#include <numeric>
#include <cstddef>
#include "opencv2/opencv.hpp"
#include <iostream>
#include <fstream>

using namespace std;
using namespace cv;
 int main( int argc, char** argv )
{
    namedWindow("Image");

    Mat Img1=imread("Img1.png",-1);
    Mat Img2=imread("Img2.png");
    cv::resize(Img1,Img1,Img2.size());
    Img1.convertTo(Img1,CV_32FC4,1.0/255.0);
    Img2.convertTo(Img2,CV_32FC3,1.0/255.0);

    vector<Mat> ch; 
    split(Img1,ch);

    Mat mask = ch[3].clone();              // here's the vignette

    ch.resize(3);

    Mat I1,I2,result;

    cv::multiply(mask,ch[0],ch[0]);
    cv::multiply(mask,ch[1],ch[1]);
    cv::multiply(mask,ch[2],ch[2]);
    merge(ch,I1);

    vector<Mat> ch2(3);
    split(Img2,ch2);
    cv::multiply(1.0-mask,ch2[0],ch2[0]);
    cv::multiply(1.0-mask,ch2[1],ch2[1]);
    cv::multiply(1.0-mask,ch2[2],ch2[2]);
    merge(ch2,I2);

    result=I1+I2;

    imshow("Image",result);
    waitKey(0);
}
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Asked: 2014-05-13 15:02:09 -0500

Seen: 922 times

Last updated: May 26 '14