Sketch-Based Image Retrieval Using Novel Edge Detector and Feature Descriptor

Table 3

Performance comparison in terms of precision and recall between the Canny edge detector and the proposed GBME in the (a) SHOG-BOF and (b) InvertedIndex SBIR systems.

(a)

Recall@	0.0	0.1	0.2	0.3	0.4	0.5	0.6	0.7	0.8	0.9	1.0
P@SBE2^†	0.435	0.243	0.184	0.144	0.115	0.094	0.077	0.063	0.051	0.041	0.030
P@SBE1^‡	0.495	0.313	0.245	0.193	0.153	0.117	0.090	0.070	0.055	0.042	0.030

^†Precision@SHOG-BOF-EDGE2 (the Canny edge detector). ^‡Precision@SHOG-BOF-EDGE1 (the proposed GBME edge detector).

(b)

Recall@	0.0	0.1	0.2	0.3	0.4	0.5	0.6	0.7	0.8	0.9	1.0
P@IIE2^†	0.488	0.334	0.262	0.211	0.167	0.126	0.088	0.061	0.047	0.033	0.024
P@IIE1^‡	0.465	0.339	0.281	0.239	0.203	0.168	0.131	0.102	0.076	0.054	0.030

^†Precision@InvertedIndex-EDGE2 (the Canny edge detector). ^‡Precision@InvertedIndex-EDGE1 (the proposed GBME edge detector).