# What is the minimum amount of memory to be reserved to store any 256 x 128 pixel bitmap

March 25, 2021 | education

| **What is the minimum amount of memory to be reserved to store any 256 x 128 pixel bitmap, provided the image can use 8 different colors?**

An image with a resolution of 256×128 contains 32768 pixels.

From the equation x = 2 ^ n (where x is the number of colors, n is the size of one point) it follows that one 8-color point takes up 3 bits of memory.

To calculate the required amount of video memory, you need to multiply the total number of points by the amount of memory occupied by one point:

32768 * 3 = 98304 bits = 12288 bytes = 12 kilobytes.

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