title: Headlights detection using Difference of Gaussian (DoG)
body: <p>I am developing a project of detecting vehicles' headlights in night scene. First I am working on a demo on MATLAB. My detection method is edge detection using Difference of Gaussian (DoG): I take the convolution of the image with Gaussian blur with 2 difference sigma then minus 2 filtered images to find edge. My result is shown below: </p>
  
  <p>Now my problem is to find a method in MATLAB to circle the round edge such as car's headlights and even street lights and ignore other edge. If you guys got any suggestion, please tell me. </p>
  
  <p><img src="https://i.stack.imgur.com/QjZIJ.jpg" alt="enter image description here"></p>
  
  <p><img src="https://i.stack.imgur.com/IRGbc.jpg" alt="enter image description here"></p>