Extract Foreground from background

Question

I have a background image and foreground image. Their point of view are equal. But shadows are different. I am going to extract contours of the legs.

I've applied background difference, but it doesn't work very well. Please someone tell me the good way. You can see the images below.

Thanks.

Possible duplicate of [CV - Extract differences between two images](http://stackoverflow.com/questions/27035672/cv-extract-differences-between-two-images) — Miki, Mar 03 '16 at 08:22

Saransh Kejriwal · Accepted Answer · 2016-03-03T09:13:54.110

1

If you're interested solely in extracting the image of a leg, then HSV-based skin detection, followed by repetitive dilation should produce better results. See code below:

#include<iostream>
#include<opencv2/core/core.hpp>
#include<opencv2/imgproc/imgproc.hpp>
#include<opencv2/highgui/highgui.hpp>
#include<stdio.h>
using namespace std;
using namespace cv;

int main()

{

Mat b=imread("b2.png");//back
Mat f=imread("f2.png");//fore
Mat hsv_th;
cvtColor(b,b,CV_BGR2HSV);
cvtColor(f,f,CV_BGR2HSV);

inRange(f,Scalar(0,100,0),Scalar(100,255,100),hsv_th);
dilate(hsv_th,hsv_th,cv::Mat());
dilate(hsv_th,hsv_th,cv::Mat());
dilate(hsv_th,hsv_th,cv::Mat());
dilate(hsv_th,hsv_th,cv::Mat());


for(;;)
{
  imshow("fore",f);
  imshow("hsv",hsv_th);

 char c=waitKey(10);
 if(c=='b')//break when 'b' is pressed
      {
         break;
      }
 }
return 0;
}

Output image:

edited Mar 03 '16 at 09:13

answered Mar 03 '16 at 04:12

Saransh Kejriwal

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OP is working with still images. You can't compute average background. – Miki Mar 03 '16 at 08:18
You can improve the answer providing the code for that showing the results ;D – Miki Mar 03 '16 at 08:30
I've changed the background and foreground. Please review again. Thanks. – Chris Asadi Mar 03 '16 at 08:55

Extract Foreground from background

1 Answers1