With line graph line at some point (such as an endpoint) began to record the coordinates of black pixels point by point, such as:(3,6),(4,7),(5,7),(6,6),(7,5),(8,5),(9,5),(10,4),(10,3),(9,2)。
With this way to store line diagram,each black pixel to be stored two coordinates(x,y),he number required to store a coordinate values and the size of the image.
For example, if an image size is 512 * 512 pixels, each coordinate values are represented with nine binary.
Why answer is 9???