Photography Motion Blur
When a shutter is clicked to create an image, due to technology restriction or creative artistic requisites, the
image doesn't represent the subject for only one instant but over a time frame of instances. As objects within a particular scene move about, an image representation of a scene must integrate all the positions of each object, along with the camera's point of view, over the exposure time period establish by the speed of the shutter. In a like image, any object having movement in relation to the
camera can appear to be blurred or smeared toward the path of relative movement. This smearing may happen on an entity that is stirring or on a stationary background if there is
camera movement. With a
film or TV image, this appears natural as the human eye acts pretty identical.
Your camera's shutter speed controls motion blur by regulating the time the shutter remains open to allow light to enter the camera’s
image sensor. If there is movement in the while the camera's shutter is open, the resulting image will be blurred. Another way of saying that the slower the shutter speed, generally the more motion blur.
Do to the effect of motion being created in relationship to the camera, the objects and the scene itself, it's possible to avoid motion blur may by moving the camera with the direction of the object in order to track any objects that are moving. By panning even with a long exposure time, the objects will come out sharper, while the background will appear more blurred.
Pretty much the same thing in computer animation every frame shows a flawless instant in time (similar to a still camera with an unlimited shutter speed), with no motion blur. Which is the very reason a video game employing a frame rate using 25- to 30 fps will appear staggered, while typical motion filmed using same frame rate will appear more continuous. A large number of next gen video games employ motion blur, particularly vehicle simulated games. In pre-depicted computer animation, similar to CGI movies, lifelike motion blur is able to be be created as the renderer has ample time to create every frame animation. Temporal anti-aliasing creates frames as a amalgamation of several instants.
Amusement ride moving as image was being exposed
Downside of motion blur effects
Typical televised sports cameras expose images at 25 or 30 times each second, while motion blur becomes inconvenient as it shrouds the exact location of a shot or athlete performing in slow motion speed. For this very reason distinctive cameras are employed that eradicate motion blurring by shooting rapid exposures in the range of 1/1000 per second, and then retransmitting them during the course of
successive 1/25 or 1/30 per second intervals. While this provides sharper slow motion replay it can appear very strange at typical speed as the human eye expects motion blurring to be present which is not.
There are times when motion blur is able to be removed from photos with the assistance of deconvolution
An example of blurred image restoration with Wiener deconvolution (reverse the
From left: original image, blurred image and de-blurred image. Notice some artifacts in de-blurred image.
Apr 15, 2011