High-pass filtering is a signal processing technique that allows high-frequency components of a signal to pass through while attenuating low-frequency components. This method is essential in various applications, such as image and audio processing, where it helps to enhance the clarity of details by reducing background noise or low-frequency interference. By transforming a signal into the frequency domain using techniques like Fourier transforms, one can effectively apply high-pass filters to separate useful information from undesired lower frequency content.
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