Fast Dictionary Matching for Content-based Image Retrieval
This work addresses image retrieval for applications like visual search, but it appears incremental as it builds on existing SURF and dictionary-based methods.
The paper tackles the problem of content-based image retrieval by searching for common sets of descriptors between image collections, using SURF keypoints and a dictionary with tolerance to achieve good performance in finding similar areas even in different scenes.
This paper describes a method for searching for common sets of descriptors between collections of images. The presented method operates on local interest keypoints, which are generated using the SURF algorithm. The use of a dictionary of descriptors allowed achieving good performance of the content-based image retrieval. The method can be used to initially determine a set of similar pairs of keypoints between images. For this purpose, we use a certain level of tolerance between values of descriptors, as values of feature descriptors are almost never equal but similar between different images. After that, the method compares the structure of rotation and location of interest points in one image with the point structure in other images. Thus, we were able to find similar areas in images and determine the level of similarity between them, even when images contain different scenes.