In motion blur, what factors are related to image degradation?

The degradation of image quality is related to noise and illumination changes.

When a camera takes an image, it displays more than a single real-time image. Due to technical limitations or artistic requirements, images represent scenes in a period of time. When the objects in the scene move, the image of the scene must show the complete combination of all the positions of these objects during the exposure time, as well as the camera's perspective.

In such a picture, any object moving in the opposite direction of the camera will look blurred or shaky. This blur may occur when shooting a moving object or shooting a still scene while the camera is moving. Movie or TV images look natural, because the human eye works in this way.

Extended data:

Computer animation accurately displays instantaneous images (just like a camera with an infinitely fast shutter) without dynamic blur. Therefore, video games with 25-30 frames per second seem to be intermittent and unnatural, while shooting natural movements at the same picture update rate seems to be continuous.

Many new generation video games are characterized by dynamic blur, especially racing simulation games. Pre-calculated computer images, such as CGI movies, can draw realistic dynamic blur because the renderer has more time to draw each picture.

Dynamic blur is often used in dynamic photography to show a sense of speed. In order to achieve the effect, it is necessary to use a slow shutter to make the camera lens rotate slowly with the movement of the object.