Final answer:
The compression ratio can be calculated by comparing the number of values kept after compression to the original number of values.
Step-by-step explanation:
The compression ratio can be calculated by comparing the number of values kept after compression to the original number of values. In this case, the original Fourier transform has a total of 16x16 = 256 values. If we want to keep only the top 10 Fourier values, the compression ratio would be 10/256.
To calculate the compression ratio as a decimal, divide the number of values kept by the original number of values: 10/256 = 0.0391. This means that the compression ratio is approximately 0.0391 or 3.91%.