title: image analysis/openCV object detection
body: <p>I'm attempting to experiment and get started with image analysis and OpenCV</p>
  
  <p>My aim is to detect certain objects in random pictures, which are easy to detect, for example: symbols and brand logos. I'd also like to be able to detect more variable features like facial features, porn features. usecase: autotagging, autofiltering </p>
  
  <p>My questions:</p>
  
  <ol>
  <li>Where should I start learning applied image-analysis in the context of my aims?</li>
  <li>What are important existing concepts/approches that I should introduce myself to?</li>
  <li>What are good existing solutions/components of OpenCV which i can feed with training-datasets of example pictures showing the objects of interest and then make a human manually outline the shapes of interest in order to make it learn to detect the features.</li>
  </ol>