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.
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.
The picture contains 4 Kbytes of information.
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