Thursday, 18 September 2014

Persistance of vision


Persistence of vision is when an afterimage imprints in your retina for one twentieth of a second giving the illusion that the light is still shining. 




For example when a light is shone in the eye for a brief amount of time the light will appear as a bright spot.The bright spot will appear to remain in sight when the light has been taken away. This is possible because of the persistence of vision. 

https://www.youtube.com/watch?v=QAGnpKz7zvY





Thursday, 11 September 2014

Walt Disney presentation

The Thaumatrope



A Thaumatrope is a disk with a picture on each side and attached to two pieces of string. When the strings are twirled quickly between the fingers the two pictures appear to blend into one due to the persistence of vision. Persistence of vision is when the retina retains an image for a brief split-second after the image was actually seen, and lends itself to animation by fostering the illusion of motion when we view images in closely-timed sequence to one another. We don't notice the fractional skips between images because that persistence fills in the momentary gap to make the motion seem seamless. Thaumatropes are recognised as important antecedents of cinematography and in particular of animation




Here is the Thaumatrope I have made myself I watched the tutorial below on YouTube to help me :

https://www.youtube.com/watch?v=SzFiuswzIa4





http://animation.about.com/od/glossaryofterms/g/pervision_def.htm














Pioneers of animation


                                                                  Pioneers of animation
  
Joseph Plateau (1801-1883) was a Belgian physicist. He was inspired by the work of Faraday and Roget and developed their ideas further to create the Phenakistoscope. He drew multiple progressive images onto counter rotating disks to give the impression that the images were moving. When spun and viewed in a mirror the impression of movement was given. To prevent the images from blurring together he added splits in the card so the image appeared to be a single moving picture.


                             


William Horner (1786-1837), a British mathematician, was another animation pioneer who created the Zoetrope in 1834. The Zoetrope was far more practical because more than one person could view the images at a time. The Zoetrope was in the shape of a drum with an open top with hand drawn sequenced pictures on a strip of paper placed in the inner bottom of the drum. The slots are cut at equal distances around the outside of the drum. to create an illusion of motion the drum is spun so the images are moving. The Zoetrope is an improvement on the Phenakistoscope (No mirror was needed and allowed several people to view at once).
                                                                                                                       http://earlycinema.com/
  
Charles-Émile Reynaud (1844-1918) was a French inventor, responsible for the first projected animated cartoons. He invented the Praxinoscope, patented in 1877, it was an adaptation of the Zoetrope. Instead of narrow viewing slits it used a prism of mirrors to reflect  and create clearer images, resulting in perfect animation without the loss in luminosity in movement. He then went on to adapt this device so that the animations could be projected, replacing the opaque drawings with transparent drawings meaning that light could be shone through them.This light was then reflected by the mirror prism and focused onto a screen through a lens.
In 1872 Reynaud developed his idea further to become theatrical entertainment. He devised a way of painting a series of pictures on small glass plates which were then joined together in a single flexible strip. The animated characters were then projected onto a screen from behind. This effect was successful but very jerky and slow and because hand drawn his films could not easily be reproduced.  Known as Reynaud theatre optique it was a very early version of cinema, all that was lacking was the addition of photography.


Eadward Muybridge( 1830-1904)(known as the father of motion) was an important British photographer who secured at least two British patents for his inventions. His large photographs of Yosemite Valley made him world famous. Having sparked considerable scientific interest, Eadweard took his work to the University of Pennslyvania. Developing a new multi-lens camera, he produced a celebrated high-speed study into the movement of both animals and humans, published in eleven volumes as Animal Locomotion: An electro-photographic investigation of consecutive phases of animal movement (1887). His Zoopraxiscope (considered the first movie projector), was a device for projecting motion pictures that pre-dated the flexible perforated film strip used in cinematography. He influenced visual artists and the developing fields of scientific and industrial photography.The Zoopraxiscope projected images from rotating glass disks in rapid succession to give the impression of motion. The stop-motion images were initially painted onto the glass, as silhouettes. A second series of discs, made in 1892–94, used outline drawings printed onto the discs photographically, then colored by hand

















Thomas Edison(1847-1931) was an American inventor and businessman who developed many devices that greatly influenced life around the world, including the Phonograph (the mechanical recording and reproduction of sound), the motion picture camera(a type of photographic camera which takes a rapid sequence of photographs on strips of film), and a long-lasting, practical electric light bulb. He was one of the first inventors to apply the principles of mass production and large-scale teamwork to the process of invention, and because of that, he is often credited with the creation of the first industrial research laboratory.






 The Lumière brothers(Auguste 1862- 1954,Louis:  1864-1948)(were the first film makers in history. They patented the Cinematograph, which was far more practical than the Kinetoscope because more than one person could view at a time, much like current cinema. The brothers thought that "the cinema is an invention without any future" and declined to sell their camera to other filmmakers because of this, their role in the history of film was very brief. They turned their attentions to colour photography and in 1903 they patented a colour photography process, the "Autochrome Lumière", launched on the market in 1907.