Code-Aligned Autoencoders for Unsupervised Change Detection in Multimodal Remote Sensing Images

Understand

Image translation with convolutional autoencoders has recently been used as an approach to multimodal change detection in bitemporal satellite images.

• A main challenge is the alignment of the code spaces by reducing the contribution of change pixels to the learning of the translation function.
• Many existing approaches train the networks by exploiting supervised information of the change areas, which, however, is not always available.
• We propose to extract relational pixel information captured by domain-specific affinity matrices at the input and use this to enforce alignment of the code spaces and reduce the impact of change pixels on the learning objective.