ImageGear .NET v25.2 - Updated
ImageGear.Processing.Advanced Assembly / ImageGear.FreqIP Namespace / ImGearFrequencyProcessing Class / ForwardDCTFromImage Method
An ImageGear.Core.ImGearPage class object to be transformed.




In This Topic
    ForwardDCTFromImage Method
    In This Topic
    Computes the forward Discrete Cosine Transform (DCT) of the input image.
    Syntax
    '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
    ) 

    Parameters

    page
    An ImageGear.Core.ImGearPage class object to be transformed.

    Return Value

    Remarks
    This method computes the forward Discrete Cosine Transform (DCT) of the input image. The difference between this method and ForwardDCT method is that this one takes an ImageGear.Core.ImGearPage class as the input.

    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.

    See Also