This is a specific model architecture proposed in the field of Computer Vision and Natural Language Processing (specifically within the "Change Captioning" task). The primary paper associated with this methodology is:
Change Captioning is the task of describing the difference between two similar images (a "before" image and an "after" image). The challenge is to ignore background clutter and focus on the subtle changes (e.g., an object being removed, added, or changed color). amp4cc