Electronic filters

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band-pass filter A filtering device that permits only those components in the frequency domain whose frequencies lie between two critical values to pass through with little attenuation, all other components being attenuated. See also band-stop filter, low-pass filter, high-pass filter.

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high-pass filter A filtering device that permits only those components in the frequency domain whose frequencies lie above some critical value to pass through with little attenuation, all other components being attenuated. See also band-stop filter, low-pass filter, band-pass filter.

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high-pass filter In remote sensing, a type of spatial-frequency filter which selectively removes low spatial-frequency data from an image and increases contrast between high spatial-frequency data. The result is that the lines which make up the edges of objects are more clearly defined. High-pass filters are used to achieve edge enhancement.

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band-pass filter See BAND FILTER.

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