This chapter covers a hybrid solution between the original software-only approach and hardware devices. This became possible only recently, with the advent of the smartphone. People now had a high quality camera and a gyroscope in a small form.
The idea behind this approach is to use the gyroscope to capture motion and the camera sensor to capture light. These two streams are then fused so that the image is always stable.
As the sensors' density increases and we head to 4K cameras, selecting a (stable) subregion of the image becomes an increasingly viable option as we can discard more of the image without compromising on the quality.