This conclusion provides an overview of the key concepts discussed in this book. The book covers the theory of moments and moment invariants and addresses the main categories of 2D and 3D moments and moment invariants, the computational issues, and their applicability in various domains. The individual classes of moments were introduced, comprising geometric moments, complex moments, and a wide variety of orthogonal moments such as Legendre, Zernike, Chebyshev, and many others. The core section of the book is dedicated to the invariance of moments with respect to various geometric and intensity degradations. It summarizes the positive as well as negative issues of moment applicability. The moments are by definition global features, computed from the whole image or from the selected region of interest (ROI). The book focuses on the vulnerability of certain moment invariants with respect to the violence of the degradation model.