title: Meaning of the seven Hu invariant moments function from OpenCV
body: <p>I understand that the seven hu invariant moments are for translation, rotation, and scale change of the object, in order to recognize the object independently these factors.</p>
  
  <p>That's why I used the function "moments" from OpenCV to extract the central moments, then I used the  function HuMoments to get the seven invariant moments of the following binarized image :</p>
  
  <p><img src="https://i.stack.imgur.com/ALUHH.jpg" alt="enter image description here"></p>
  
  <p>My first question is regarding the use of the function "moments" from OpenCV. The second parameter is "binaryImage" and I set it true, because it's a binary image, is it ok?</p>
  
  <p>My second doubt is regarding the output of the function "HuMoments": the seven hu invariant moments. I don't understand this data. what data is related to rotation, what for translation and what for scale change?.</p>
  
  <p>Many thanks!, cheers!</p>