Often, even with the best efforts, it is not possible to get the perfect shot - the limitations of the equipment itself, the unsuitable environment or the inevitable movement prevent this. But scientists have figured out a way to make several imperfect images into one better one - a process called digital image fusion. It takes advantage of the fact that errors occur randomly and in a different part of each image. The method works in two steps. First, the images are transformed on top of each other, and then magic can be done in the overlay area: removing blur and increasing resolution.

It often happens that even with the best efforts we do not get a perfect image - this is prevented by inappropriate lighting conditions, movement of the subjects, hand shake or even limitations in the instruments themselves.

Sometimes we want to see if the person behind the bush is hiding a weapon, or what is the nature of the formation depicted by various medical methods. We would need to image in multiple spectral bands at the same time, or have a higher resolution image. This is often not technically feasible. But scientists have figured out a way to make one better image out of several imperfect ones - a process called digital image fusion.

Prof. Ing. Jan Flusser, DrSc., Institute of Information Theory and Automation of the CAS: The procedure is based on the idea that we take several low-quality images of the same object, and the main idea is that in each low-quality image there is some slightly different information hidden, and by combining these few low-quality images you get one that is high quality.

The full video can be found here.