1. Relationship between Images and Videos
2. Persistence of vision in playing (and computing) Videos
3. Extend filtering and processing of Images to Videos
4. Tracking points in Videos
Digital Image
numeric representation in two-dimensions (x and y)
referred to as I(x,y) in continuous function from I(i,j) in descrete
Image resolution
expressed as representation of width and Height of the image
Each pixel (picture element) contains light intensities for each value of x and y of I(x,y)
Video Resolution
– expressed as representation of width and height of the image
– usually in aspect ratios of 4*3, 16*9, etc
Foundation observation of why we perceive video
Rational behind the invention of video cameras
muybirdge(1830-1904) used stop-action photographs to study animal motion
Processing/ Filtering Video
– same as with images, just over a video volume
– Can filter in 3D
(x,y,t)
– Motion information is used in video compression
apply to xt- and yt- space
if all pixels from one frame to another frame, different, than it maybe a drastic motion change
same as in images
leverage the fact that features found in one frame may be visible in the next
