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Table 3 The MAP of different hashing methods for mobile visual search based location recognition

From: Deep learning hashing for mobile visual search

Method MAP
  16-bits 32-bits 64-bits 128-bits
VHB [81] - - 19.36% -
SSFS [77] - - 20.22% -
DLBH+QCNN 59.80% 78.68% 87.15% 90.67%
SSDH+QCNN 78.26% 91.82% 92.43% 93.21%