Why is bandwidth in frequency?

Bandwidth is completely related to frequency but definitely, bandwidth is not frequency. However, bandwidth is the range of frequencies. Bandwidth is defined as the difference in the upper and lower frequency components present in a signal . Thus, it specifies the amount of data being transmitted per second.

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Why is spatial frequency important?

The spatial frequency (SF) scales of facial information are generally used to categorizing faces . The image with high spatial frequencies (HSF) represents the fine-scale details of the original image, while the low spatial frequencies (LSF) retain the large-scale global shape of visual formation.

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