Dynamically Updated Semi-Supervised Change Detection Network Combining Cross-Supervision and Screening Algorithms

Semi-supervised change detection (CD) is increasingly becoming an interesting and challenging topic for the remote sensing image processing community. As the application of deep learning in change detection becomes more and more widespread, there is a growing lack of labeled training data, which substantially limits the practical application of change detection. In order to discuss a more effective semi-supervised change detection approach and to make more reasonable use of the large amount of remote sensing data, we propose a semi-supervised change detection framework in this article, which utilizes two different networks to cross-supervise and provide information to each other. Unlike most existing semi-supervised change detection, the proposed framework also incorporates a new filtering algorithm to find better pseudolabels for the retraining of the two networks in the article. Then, the computation of the loss functions of the two networks is crossed and the two networks are used for Transformer and convolutional neural network (CNN) different learning paradigms, respectively, while simplifying the classical deep collaborative learning for consistency regularization. In addition, we add two markers to record the highest mean intersection over union (MIoU) of training during retraining, and dynamically update the pseudolabels as the training metrics progressively improve, which significantly improves the training effect. Our approach is tested on public dataset and achieves very good results that effectively demonstrate the effectiveness of the proposed framework.

I. Introduction

Since change detection (CD) has been an important issue in remote sensing applications, a large amount of literature has been published in recent years to discuss various issues in change detection [1], [2], [3], [4]. With the gradual improvement of the resolution and quality of remote sensing images, change detection is becoming more and more effective because of the development of remote sensing technology, which gradually produces application values in land use [5], [6], [7], urban planning [8], ecological environmental protection [9], [10], and so on.