ImageGear .NET
BandPassFilter
| User Guide > How to Work with... > Image Processing and Cleanup > Process Images in the Frequency Domain > Image Filtering > BandPassFilter |
This BandPassFilter Method filters the image using a band-pass filter.
Available filter brands include Ideal, Butterworth, Gaussian, Chebyshev I, and Chebyshev II.
Cutoff frequency is normalized between 0 and 1.0 where 0 is DC, and 1.0 is the Nyquist frequency.
Before using this method, like other frequency processing methods, ImGearFrequencyProcessing.InitializeFFTW Method must be called first to enable the support for FFTW.
Can be applied only to 8-bit grayscale images with one channel.
ImGearFrequencyProcessingVerifier.CanApplyBandPassFilter Method can be called to check whether the operation can be performed or not.