CDChat: A Large Multimodal Model for Remote Sensing Change Description

Understand

Large multimodal models (LMMs) have shown encouraging performance in the natural image domain using visual instruction tuning.

• However, these LMMs struggle to describe the content of remote sensing images for tasks such as image or region grounding, classification, etc.
• Recently, GeoChat make an effort to describe the contents of the RS images.
• Although, GeoChat achieves promising performance for various RS tasks, it struggles to describe the changes between bi-temporal RS images which is a key RS task.