nicephore niepce invented the zöopraxiscope which projected still photographs in rapid succession.
who invented the zöopraxiscope which projected still photographs in rapid succession?
nicephore niepce
the first movie projector was the zoopraxiscope, invented by british photographer eadweard muybridge in 1879. 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.
movie projector
wobulation works by overlapping pixels. it does so by generating multiple sub-frames of data while an optical image shifting mechanism (e.g. the mirror of a digital micromirror device) then displaces the projected image of each sub-frame by a fraction of a pixel (e.g. one-half or one-third). the sub-frames are then projected in rapid succession, and appear to the human eye as if they are being projected simultaneously and superimposed. for example, a high-resolution hdtv video frame is divided into two sub-frames, a and b. sub-frame a is projected, and then the miniature mirror on a digital micromirror device switches and displaces sub-frame b one half pixel length as it is projected. when projected in rapid succession, the sub-frames superimpose, and create to the human eye a complete and seamless image. if the video sub-frames are aligned so that the corners of the pixels in the second sub-frame are projected at the centers of the first, the illusion of double the resolution is achieved, like in an interlaced crt display. thus a lower resolution fixed pixel device using wobulation can emulate the picture of higher resolution fixed device, at a reduced cost.
wobulation