The classification of remote sensing image plays an important role in pattern recognition. The objective of the image classification is extracted the tremendous information,  patterns present in the image in form of classes The Satellite images play a major role in a hassle-free monitoring and management of the natural resources such as land, forest, water etc. This paper presents a comprehensive overview of Image classification, its techniques, and review of various previously conducted works with techniques observations and the results obtained by them respectively. It also discusses the emerging classification techniques such as Fuzzy Logic and Artificial Neural Networks in brief.