Multi-Graph Fusion and Learning for RGBT Image Saliency Detection

RGB and thermal infrared (RGBT) image saliency detection is a relatively new direction in the field of computer vision. Combining the advantages of RGB images and T images can significantly improve detection performance. Currently, there are only a few methods to work on RGBT saliency detection, and the number of image samples cannot meet the training requirements for deep learning, so it remains valuable to propose an effective unsupervised method. In this paper, we present an unsupervised RGBT saliency detection method based on multi-graph fusion and learning. Firstly, RGB images and T images are adaptively fused based on boundary information to produce more accurate superpixels. Next, a multi-graph fusion model is proposed to selectively learn useful information from multi-modal images. Finally, we implement the theory of finding good neighbors in the graph affinity and propose different algorithms for two stages of saliency ranking. Experimental results on three RGBT datasets show that the proposed method is effective compared with the state-of-the-art algorithms.