Xiangyang Xu, Wenjing Geng, Ran Ju, Yang Yang, Tongwei Ren, and Gangshan Wu
Figure 1. OBSIR indexes objects instead of images using stereo cues to improve searching results. Returned examples are ranked based on the visual similarity to the object/ROI of the query image. Higher PR can be achieved owing to a powerful stereo object segmentation method.
Recent years, the stereo image has become an emerging media in the field of 3D technology, which leads to an urgent demand of stereo image retrieval. In this paper, we will introduce a framework for object-based stereo image retrieval (OBSIR), which retrieves images containing the similar objects to the one captured in the query image by the user. The proposed approach consists of both online and offline procedures. In the offline procedure, we propose a salient object segmentation method making use of both color and depth to extract objects from each image. The extracted objects are then represented by multiple visual feature descriptors. In order to improve the image search efficiently, we build an approximate nearest neighbor (ANN) index using clustering based locality sensitive hashing (LSH). In the online stage, the user may supply the query object by selecting a region of interest (ROI) in the query image, or clicking one of the objects recommended by the salient object detector. For the image retrieval evaluation we build a new dataset containing over 10K stereo images. The experiments on this dataset show that the proposed method can effectively recommend the correct object and the final retrieval result is also better than other baseline methods.
Figure 2. Comparisons with state-of-the-art methods.