An invariant object recognition system needs to be able to recognise the object under any usual a priori defined distortions such as translation, scaling and in‐plane and outof‐ plane rotation. Ideally, the system should be able to recognise (detect and classify) any complex scene of objects even within background clutter noise. This problem is a very complex and difficult one. In this book, we present recent advances towards achieving fully‐robust object recognition. In the book’s chapters’ cutting edge recent research is discussed in details for all the readers with a core or wider interest in this area