Differences between Low Pass Filter and High Pass Filter

What is a low pass filter?

The lowpass filter is one type of frequency-domain filter that is used for smoothing the image and also it attenuated the high-frequency components and preserve the low-frequency components 

What is a high pass filter?

As we know that the high pass filter is the one type of frequency-domain filter that is used for sharpening the image and it also attenuates the low-frequency components and preserves the high-frequency components.

Here this article gives the difference between low pass filter and high pass filter to better understand this topic.

The main key difference between low pass filter and high pass filter are listed below:

  • A low pass filter is used for smoothing the image while in high pass filter is used for sharpening the image.
  • Low pass filter attenuates the high frequency while in high pass filter is attenuate the low frequency.
  • Low pass filter allows the frequency below the cut off frequency to pass through it but in high pass filter allows the frequencies above the cut-off frequency to pass through it.
  • In the Low pass filter, the low frequency is preserved in it but in high pass filter, high frequency is preserved in it.
  • A low pass filter consists of a resistor that is followed by a capacitor while in high pass filter consists of a capacitor that is followed by a resistor.
  • Low pass filter helps in removal of aliasing effect, High pass filter helps In the removal of noise.
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