The present invention is to provide a neuromorphic memristor crossbar circuit having a twin crossbar circuit consisting of two identical crossbar arrays of image-recognition binary memristor. The neuromorphic memristor crossbar circuit comprises a first crossbar array composed of a memristor array composed of N X M memristors and storing an image vector, a second crossbar array composed of the first crossbar array and a memristor array having a twin crossbar structure, receiving an inverted vector of the input vector of the first crossbar array and storing the inverted image vector, a subtractor for subtracting the output vector of the first crossbar array and the output vector of the second crossbar array and measuromg the amount of similarity, and a winner-take-all circuit part which compares the amount of similarity measured by the subtractor with a stored image vector, selects and outputs a stored image vector having the most similarity.;COPYRIGHT KIPO 2017
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