ImageGear for .NET
ForwardDCTFromImage Method
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ImageGear21.Processing.Advanced Assembly > ImageGear.FreqIP Namespace > ImGearFrequencyProcessing Class : ForwardDCTFromImage Method




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

Glossary Item Box

Computes the forward Discrete Cosine Transform (DCT) of the input image.

Syntax

 
Visual Basic
C#
Managed Extensions for C++
C++/CLI
 
 

Parameters

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

Return Value

ImGearComplexObject class.

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.

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