1 The ability of computer to see.
Image Understanding
Machine Vision
Robot Vision
Image Analysis
Video Understanding
2 how about a picture ?
usually : A picture is worth a thousand words.
how about a word ?
usually : A word is worth a thousand pictures.
3 Image
2-D array of numbers (intensity values, gray levels)
Gray levels 0 (black) to 255 (white)
Color image is 3 2-D arrays of numbers
Red
Green
Blue
Resolution (number of rows and columns)
example
128*128
256*256
512*512
640*480
1920*1080
4k
...
4 Image Formats
pgm
gif
jpeg
png
...
5 Video
Sequence of frames
30 frames per second
...
Formats
AVI
MPEG
.....