How much information does a black and white picture consisting of 128 * 256 pixels contain?

Since the picture is black and white, the information volume of one color will be equal to:

N = 2 ^ i

2 = 2 ^ 1

i = 1 bit.

Find the total number of pixels in the image.

To do this, we multiply its sizes among ourselves.

We get:

128 * 256 = 32768 pixels.

32768 * 1 = 32768 bits.

We translate the amount of information into Kbytes.

Since 1 KB contains 1024 bytes, and 1 byte contains 8 bits, we get:

32768/1024 * 8 = 32768/8196 = 4Kb.

Answer:

The picture contains 4 Kbytes of information.