|
Marçal Rusiñol and Josep Llados. 2006. Symbol Spotting in Technical Drawings Using Vectorial Signatures. Graphics Recognition: Ten Years Review and Future Perspectives, W. Liu, J. Llados (Eds.), LNCS 3926: 35–46.
|
|
|
Albert Gordo, Florent Perronnin, Yunchao Gong and Svetlana Lazebnik. 2014. Asymmetric Distances for Binary Embeddings. TPAMI, 36(1), 33–47.
Abstract: In large-scale query-by-example retrieval, embedding image signatures in a binary space offers two benefits: data compression and search efficiency. While most embedding algorithms binarize both query and database signatures, it has been noted that this is not strictly a requirement. Indeed, asymmetric schemes which binarize the database signatures but not the query still enjoy the same two benefits but may provide superior accuracy. In this work, we propose two general asymmetric distances which are applicable to a wide variety of embedding techniques including Locality Sensitive Hashing (LSH), Locality Sensitive Binary Codes (LSBC), Spectral Hashing (SH), PCA Embedding (PCAE), PCA Embedding with random rotations (PCAE-RR), and PCA Embedding with iterative quantization (PCAE-ITQ). We experiment on four public benchmarks containing up to 1M images and show that the proposed asymmetric distances consistently lead to large improvements over the symmetric Hamming distance for all binary embedding techniques.
|
|
|
Alicia Fornes, Sergio Escalera, Josep Llados, Gemma Sanchez, Petia Radeva and Oriol Pujol. 2007. Handwritten Symbol Recognition by a Boosted Blurred Shape Model with Error Correction. 3rd Iberian Conference on Pattern Recognition and Image Analysis (IbPRIA 2007), J. Marti et al. (Eds.) LNCS 4477:13–21.
|
|
|
Jose Antonio Rodriguez, Gemma Sanchez and Josep Llados. 2007. Rejection strategies involving classifier combination for handwriting recognition. 3rd Iberian Conference on Pattern Recognition and Image Analysis (IbPRIA 2007), J. Marti et al. (Eds.) LNCS 4478:97–104.
|
|
|
Marçal Rusiñol, Philippe Dosch and Josep Llados. 2007. Boundary Shape Recognition Using Accumulated Length and Angle Information. 3rd Iberian Conference on Pattern Recognition and Image Analysis (IbPRIA 2007), J. Marti et al. (Eds.) LNCS 4478:210–217.
|
|
|
Josep Llados, Partha Pratim Roy, Jose Antonio Rodriguez and Gemma Sanchez. 2007. Word Spotting in Archive Documents using Shape Contexts. 3rd Iberian Conference on Pattern Recognition and Image Analysis (IbPRIA 2007), J. Marti et al. (Eds.) LNCS 4478:290–297.
|
|
|
Josep Llados. 2007. Advances in Graphics Recognition. Digital Document Processing, Major Directions and Recent Advances, Advances in Pattern Recognition, B.B. Chaudhuri, ed., 281–304.
|
|
|
Josep Llados and Dorothea Blostein. 2007. Special Issue on Graphics Recognition. Guest Editors.
|
|
|
Miquel Ferrer, Ernest Valveny and F. Serratosa. 2007. Bounding the Size Of the Median Graph. 3rd Iberian Conference on Pattern Recognition and Image Analysis (IbPRIA 2007), J. Marti et al. (Eds.) LNCS 4478(2):491–498.
|
|
|
Miquel Ferrer, Ernest Valveny and F. Serratosa. 2007. Comparison Between two Spectral-based Methods for Median Graph Computation. 3rd Iberian Conference on Pattern Recognition and Image Analysis (IbPRIA 2007), J. Marti et al. (Eds.) LNCS 4478(2):580–587.
|
|