title: What is the best Head Cascade Classifier in OpenCV
body: <p>I am using OpenCV 3.1 on a Raspbian Jessie OS using pi zero board.</p>
  
  <p>I used "haarcascade_frontalface_alt" for face detection and it works really good on low resolution images using Python. What i want to do is to detect the heads of people since i may not have their faces in the captured images.</p>
  
  <p>What is the best cascade to use in this case? also is there a catalog page that describe existing cascades and the use case for each one?</p>
  
  <p>Thanks.</p>