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

As we know from the school computer science curriculum, it takes 1 bit to encode 1 point of a black and white picture (2 = 21).

Let’s determine how many dots a black and white picture contains when it is known from the condition that its size is 128 * 256:

128 * 256 = 32768.

That is, it will contain 32768 bits of information.

Let’s translate the received information into Kbytes:

32768: 8: 1024 = 4.

Answer: Under such conditions, a black and white picture will contain the amount of information equal to 32768 bits or 4 Kbytes.