Howtosignalprocessing
- What is LPF and HPF?
- How do you calculate low-pass filter coefficients?
- How can you tell if a filter is high pass or low pass?
- What is Q-factor of high-pass filter?
What is LPF and HPF?
Low pass filter: Low pass filter is the type of frequency domain filter that is used for smoothing the image. It attenuates the high frequency components and preserves the low frequency components. High pass filter: High pass filter is the type of frequency domain filter that is used for sharpening the image.
How do you calculate low-pass filter coefficients?
The numerator coefficients for a low-pass filter can be calculated as follows: b0 = W / α b1 = 2 * W / α b2 = b0. The numerator coefficients for a high-pass filter can be calculated as follow: b0 = 1 / α b1 = -2 / α b2 = b0.
How can you tell if a filter is high pass or low pass?
If a filter passes low frequencies and blocks high frequencies, it is called a low-pass filter. If it blocks low frequencies and passes high frequencies, it is a high-pass filter.
What is Q-factor of high-pass filter?
The Q-factor determines the sharpness of the gain slope as it rises to meet the cutoff frequency. A Q of 1.00 causes a constant slope directly to the maximum Gain at the cutoff frequency, a slight rise above the maximum Gain, then gradually falls back to the maximum Gain as frequency increases.
