LAUSR

Image classification has been an incredibly active research topic in recent years with widespread applications. Researchers have put forward many remarkable techniques and semi-supervised learning (SSL) is one among them. However, due to not taking the relationship of samples among different classes in consideration, previous approaches cannot often get a clear decision boundary. In this paper, we propose an improved classification model on the basis of SSL. First, we adopt a deformable part-based model to capture a stable global structure and salient objects, and then, we find a better decision boundary by our classification algorithm-based on an improved ensemble projection (IEP). Our IEP exploits the weighted average method. To evaluate the effectiveness of our approach, we do experiments not only with the LandUse-21 (L-21) data set, but also with an architecture style data set. Experimental results show that our approach is capable of achieving the state-of-the-art performance on the two data sets. For each class in L-21 data set, when 50 images are randomly chosen as training images, the multi-class average precision increases to 97.63%. Besides, for the architecture style data set, we achieve the best result with about 80% accuracy and have about a 10% improvement over the previous best work. Although there are a small number of labeled data used to train, we get the satisfactory performance.