Computer Vision ---- Introduction to Computer Vision

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

                .....