Remote Sensing Digital Image Analysis: An Introduction

I own the 3rd edition of this book and it's a bit dated for a course I took recently, but it got me through the difficult to grasp concepts like PCA and Fourier analysis.Not bad.

This is one of the best books in the field of remote sensing. This book describes in detail, with good examples, the most important methods for multispectral image analysis. No previous background is needed and only basic mathematics are required.