Distinctive Image Features from Scale-Invariant Keypoints
International Journal of Computer Vision
A Performance Evaluation of Local Descriptors
IEEE Transactions on Pattern Analysis and Machine Intelligence
Creating Efficient Codebooks for Visual Recognition
ICCV '05 Proceedings of the Tenth IEEE International Conference on Computer Vision (ICCV'05) Volume 1 - Volume 01
Local Features for Object Class Recognition
ICCV '05 Proceedings of the Tenth IEEE International Conference on Computer Vision - Volume 2
Machine Learning
Scalable Recognition with a Vocabulary Tree
CVPR '06 Proceedings of the 2006 IEEE Computer Society Conference on Computer Vision and Pattern Recognition - Volume 2
Beyond Bags of Features: Spatial Pyramid Matching for Recognizing Natural Scene Categories
CVPR '06 Proceedings of the 2006 IEEE Computer Society Conference on Computer Vision and Pattern Recognition - Volume 2
Evaluation campaigns and TRECVid
MIR '06 Proceedings of the 8th ACM international workshop on Multimedia information retrieval
International Journal of Computer Vision
Towards optimal bag-of-features for object categorization and semantic video retrieval
Proceedings of the 6th ACM international conference on Image and video retrieval
Speeded-Up Robust Features (SURF)
Computer Vision and Image Understanding
A comparison of color features for visual concept classification
CIVR '08 Proceedings of the 2008 international conference on Content-based image and video retrieval
Randomized Clustering Forests for Image Classification
IEEE Transactions on Pattern Analysis and Machine Intelligence
ACCV'06 Proceedings of the 7th Asian conference on Computer Vision - Volume Part I
Fast anisotropic Gauss filtering
IEEE Transactions on Image Processing
New trends and ideas in visual concept detection: the MIR flickr retrieval evaluation initiative
Proceedings of the international conference on Multimedia information retrieval
Proceedings of the Tenth International Workshop on Multimedia Data Mining
Unsupervised multi-feature tag relevance learning for social image retrieval
Proceedings of the ACM International Conference on Image and Video Retrieval
Surfing on artistic documents with visually assisted tagging
Proceedings of the international conference on Multimedia
Visual codebooks survey for video on-line processing
ICCVG'10 Proceedings of the 2010 international conference on Computer vision and graphics: Part I
The University of Aamsterdam's concept detection system at ImageCLEF 2009
CLEF'09 Proceedings of the 10th international conference on Cross-language evaluation forum: multimedia experiments
An eye fixation database for saliency detection in images
ECCV'10 Proceedings of the 11th European conference on Computer vision: Part IV
Innovative directions in self-organized distributed multimedia systems
Multimedia Tools and Applications
A BOVW based query generative model
MMM'11 Proceedings of the 17th international conference on Advances in multimedia modeling - Volume Part I
A hybrid supervised-unsupervised vocabulary generation algorithm for visual concept recognition
ACCV'10 Proceedings of the 10th Asian conference on Computer vision - Volume Part III
Spatial codebooks for image categorization
Proceedings of the 1st ACM International Conference on Multimedia Retrieval
Shared feature extraction for semi-supervised image classification
MM '11 Proceedings of the 19th ACM international conference on Multimedia
Refining local descriptors by embedding semantic information for visual categorization
MM '11 Proceedings of the 19th ACM international conference on Multimedia
SBNMA '11 Proceedings of the 2011 ACM workshop on Social and behavioural networked media access
Multi-scale and real-time non-parametric approach for anomaly detection and localization
Computer Vision and Image Understanding
Efficient misbehaving user detection in online video chat services
Proceedings of the fifth ACM international conference on Web search and data mining
A GPU-based high-throughput image retrieval algorithm
Proceedings of the 5th Annual Workshop on General Purpose Processing with Graphics Processing Units
Robust image retrieval using bag of visual words with fuzzy codebooks and fuzzy assignment
Proceedings of the 12th International Conference on Knowledge Management and Knowledge Technologies
Fast semantic image retrieval based on random forest
Proceedings of the 20th ACM international conference on Multimedia
Topic based pose relevance learning in dance archives
Proceedings of the 21st ACM international conference on Information and knowledge management
Random forest for image annotation
ECCV'12 Proceedings of the 12th European conference on Computer Vision - Volume Part VI
Salient object detection: From pixels to segments
Image and Vision Computing
Color invariant SURF in discriminative object tracking
ECCV'10 Proceedings of the 11th European conference on Trends and Topics in Computer Vision - Volume Part II
Accelerating visual categorization with the GPU
ECCV'10 Proceedings of the 11th European conference on Trends and Topics in Computer Vision - Volume Part II
Pattern Recognition Letters
Hi-index | 0.00 |
We start from the state-of-the-art Bag of Words pipeline that in the 2008 benchmarks of TRECvid and PASCAL yielded the best performance scores. We have contributed to that pipeline, which now forms the basis to compare various fast alternatives for all of its components: (i) For descriptor extraction we propose a fast algorithm to densely sample SIFT and SURF, and we compare several variants of these descriptors. (ii) For descriptor projection we compare a k-means visual vocabulary with a Random Forest. As a preprojection step we experiment with PCA on the descriptors to decrease projection time. (iii) For classification we use Support Vector Machines and compare the x2 kernel with the RBF kernel. Our results lead to a 10-fold speed increase without any loss of accuracy and to a 30-fold speed increase with 17% loss of accuracy, where the latter system does real-time classification at 26 images per second.