Object detection (or rather, recognition) is one of the fundamental problems in computer vision and a lot of techniques have come up to solve it. Invariably all of them employ machine learning, because the computer has to first learn that a particular bunch of pixels with particular properties is called a book , remember that information, and use it in future to say whether the query image has a book or not.-

Object detection (or rather, recognition) is one of the fundamental problems in computer vision and a lot of techniques have come up to solve it. Invariably all of them employ machine learning, because the computer has to first　learn　that a particular bunch of pixels with particular properties is called a　book , remember that information, and use it in future to say whether the query image has a book or not.