History of engineering & technology 5 Technology: general issues 5 image matching 5 Image matching 4 identity of interest 3 sketch to photo 3 Difference of Gaussian 2 Feature extraction 2 Research and information: general 2 Semantics 2 oriented gradient histogram 2 Aerial images 1 Airborne platforms 1 Algorithms 1 Antennas 1 Automatic identification 1 Automation 1 Autonomous navigation 1 Cameras 1 Cascaded feature extraction 1 Chinese universities 1 Classification (of information) 1 Cluster analysis 1 Computer hardware 1 Computer science 1 Computer vision 1 Computers 1 Criminal investigation 1 Cross-platform 1 Data acquisition 1