Digital Revolution

Pixel Pictures

Joseph Malkevitch
Department of Mathematics and Computing
York College (CUNY)
Jamaica, New York 11451-0001

email: joeyc@cunyvm.cuny.edu
web page: www.york.cuny.edu/~malk

Suppose the following code is used:

00 = white
01 = x
10 = +
11 = black.

1. Reconstruct an 6 x 5 image (6 rows and 5 columns) if the image was scanned top row to bottom row and from left to right in each row:

000000000000100010000011001100001111110000010001000000000000

2. What image would you get from the binary string above if the 6 x 5 image were reconstructed scanned leftmost column to rightmost column, and within each column from top to bottom?

3. Suppose the code used were:

00 = black
01 = x
10 = +
11 = white

what images would you get for 1. and 2. above?

4. What other ways might one scan the rows and columns different from the choices above? Why might one choose such an exotic system?