ImageGear21.Processing.Advanced Assembly > ImageGear.FreqIP Namespace > ImGearFrequencyProcessing Class : ForwardDCTFromImage Method |
'Declaration Public Shared Function ForwardDCTFromImage( _ ByVal page As ImGearPage _ ) As ImGearComplexObject
'Usage Dim page As ImGearPage Dim value As ImGearComplexObject value = ImGearFrequencyProcessing.ForwardDCTFromImage(page)
public static ImGearComplexObject ForwardDCTFromImage( ImGearPage page )
public: static ImGearComplexObject* ForwardDCTFromImage( ImGearPage* page )
public: static ImGearComplexObject^ ForwardDCTFromImage( ImGearPage^ page )
Before using this method, like other frequency processing methods, InitializeFFTW method must be called first to initialize the support for FFTW.
Can be applied only to 8, 16, or 32bit grayscale images with one channel.
ImGearFrequencyProcessingVerifier.CanApplyForwardDCTFromImage method can be called to check whether the operation can be performed or not.