Recognizing humans by their ear have recently received significant attention in the field of research. Ear is the rich in characteristics. The ear recognition does not suffer from some problems associated with other passive biometrics, such as face recognition and the ear shape very stable with respect to age. Further, the ear can be used for human recognition in surveillance videos where the face may be occluded completely or in part. This paper provides a detailed survey of research done in

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... r detection and recognition on 2D and 3D images respectively. This survey paper is very useful in the current state-of-art for those who are working in this area and also for those who might exploit this new approach.