The term illusory motion, also known as motion illusion, is an optical illusion in which a static image appears to be moving due to the cognitive effects of interacting color contrasts ans shape position. Illusion of motion was used in many different types of animation when it was first brought to life in the 3rd millennium B.C. as the first ever animation piece what was created.
Persistence of vision
Persistence of vision refers to the optical illusion whereby multiple discrete images blend into a single image in the human mind and believed to be the explanation for motion perception in cinema and animated films. Persistence of vision is a commonly-accepted although somewhat controversial theory which states that the human eye always retains visions of images for a fraction of a second. In animation moving characters are often shot on twos which means one image is shown for every two frames of film, a total of 12 drawings per second. Although this is just on the limit of our persistence of vision it is usually satisfactory for creating smooth and lifelike animation.
Beta Movement
The beta movement is an optical illusion, first described by Max Wertheimer in 1912, whereby a series of static images on a screen creates the illusion of a smoothly flowing scene. This occurs when the frame rate is greater than 10 to 12 separate images per second. It might be considered to the effects of animation. The static images do not physically change but give the appearance of motion because of being rapidly changed faster than the human eye can see. The optical illusion is caused by the fact that the human optic nerve responds to changes in light at about 10 cycles per second. So changes about double of this are registered as motion instead of being separate distinct images.
Frame Rate
Frame rate also known as frame frequency, is the frequency (rate) at which an imaging device displays consecutive images called frames. The term applies equally to film and video cameras, computer graphics, and motion capture systems. Frame rate is expressed in frames per second (FPS). The temporal sensitivity and resolution of human vision varies depending on the type and characteristics of visual stimulus, and it differs between individuals. The human visual system can process 10 to 12 separate images per second and perceive them individually and sequences at higher rates are perceived as motion.
Suspension of Disbelief
The term suspension of disbelief or willing suspension of disbelief has been defined as a willingness to suspend one's critical faculties and believe the unbelievable; sacrifice of realism and logic for the sake of enjoyment. The phrase suspension of disbelief came to be used more loosely in the 20th century, often used to imply that the burden was on the reader rather than the writer, to achieve it.
Beta Movement
The beta movement is an optical illusion, first described by Max Wertheimer in 1912, whereby a series of static images on a screen creates the illusion of a smoothly flowing scene. This occurs when the frame rate is greater than 10 to 12 separate images per second. It might be considered to the effects of animation. The static images do not physically change but give the appearance of motion because of being rapidly changed faster than the human eye can see. The optical illusion is caused by the fact that the human optic nerve responds to changes in light at about 10 cycles per second. So changes about double of this are registered as motion instead of being separate distinct images.
Frame Rate
Frame rate also known as frame frequency, is the frequency (rate) at which an imaging device displays consecutive images called frames. The term applies equally to film and video cameras, computer graphics, and motion capture systems. Frame rate is expressed in frames per second (FPS). The temporal sensitivity and resolution of human vision varies depending on the type and characteristics of visual stimulus, and it differs between individuals. The human visual system can process 10 to 12 separate images per second and perceive them individually and sequences at higher rates are perceived as motion.
Suspension of Disbelief
The term suspension of disbelief or willing suspension of disbelief has been defined as a willingness to suspend one's critical faculties and believe the unbelievable; sacrifice of realism and logic for the sake of enjoyment. The phrase suspension of disbelief came to be used more loosely in the 20th century, often used to imply that the burden was on the reader rather than the writer, to achieve it.
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