High pass or low pass kernel?

1. Whats the difference between high pass and low pass?
2. What is low-pass filter kernel?
3. When should I use high pass?
4. What is high pass in image processing?

Whats the difference between high pass and low pass?

The key difference between high pass and low pass filter is that the high pass filter circuit passes signals of the frequency higher than the cut off frequency while the low pass filter passes signals of the frequency lower than the cut off frequency.

What is low-pass filter kernel?

A low pass filter is the basis for most smoothing methods. An image is smoothed by decreasing the disparity between pixel values by averaging nearby pixels. Using a low pass filter tends to retain the low frequency information within an image while reducing the high frequency information.

When should I use high pass?

If you are broadcasting or reinforcing sound outside, and even your best windscreen can't keep out the persistent low-frequency rumble from wind noise, then stopping it right at the source may be your best option. Highpass filters are excellent for this application.

What is high pass in image processing?

A high pass filter is the basis for most sharpening methods. An image is sharpened when contrast is enhanced between adjoining areas with little variation in brightness or darkness. A high pass filter tends to retain the high frequency information within an image while reducing the low frequency information.