The numbers to the left of the grids below are encodings of the images. Each row of numbers tells you how to fill in a row of pixels (squares) in the grid from left to right. The first number tells how many blanks there are, then the second tells you how many colored squares follow the blanks, then the next number tells you how many blanks follow the squares, and on and on, until there are no more numbers in the row. Complete all the rows in this way, and you'll have a picture! (We've done the third row for you.)
Here's another:
