Final answer:
False, A bounding box around an image is not always a rectangle as there are different types of bounding shapes used in various applications, although rectangular bounding boxes are the most common.
Step-by-step explanation:
The statement 'A bounding box around an image is always a rectangle?' can be answered as False. Although the most commonly used bounding box is rectangular, especially in computer graphics and image processing, there are other shapes of bounding boxes in existence. For example, a bounding box can be any polygon that encloses an object but rectilinear or axis-aligned bounding boxes (AABB) that are rectangular are the most typical because they are simple to compute and work with. In some advanced applications, oriented bounding boxes (OBB) or bounding spheres are used depending on the spatial requirements.