image retrieval 8 Image retrieval 7 Deep learning 5 Convolution 4 Convolutional neural network 4 deep learning 4 human 4 Algorithms 3 Diagnosis 3 Image processing 3 Medical imaging 3 Semantics 3 algorithm 3 article 3 Article 2 CCA fusion 2 Convolutional neural networks 2 Criminal investigation 2 Cross modality 2 Hash functions 2 Humans 2 Identity of interest 2 Multilayer neural networks 2 Search engines 2 State-of-the-art methods 2 classification algorithm 2 face sketch 2 forensic 2 image segmentation 2 learning 2