1. Dance, C.R., Fan, L., Willamowski, J., Bray, C.: Visual categorization with bags of keypoints. In: European Conference on Computer Vision Workshop on Statistical Learning in Computer Vision (2004)
2. Mikolajczyk, K., Schmid, C.: A performance evaluation of local descriptors. Trans. Pattern Anal. Mach. Intell. 27(10), 1615–1630 (2005)
3. Fei-Fei, L., Perona, P.: A bayesian hierarchical model for learning natural scene categories. In: Computer Vision and Pattern Recognition (2005)
4. Zhang, J., Marszalek, M., Lazebnik, S., Schmid, C.: Local features and kernels for classification of texture and object categories: an in-depth study: a comprehensive study. Int. J. Comput. Vis. 73(2), 213–218 (2007)
5. Lazebnik, S., Schmid, C., Ponce, J.: Beyond bags of features: spatial pyramid matching for recognizing natural scene categories. In: Computer Vision and Pattern Recognition (2006)