DiscreteFourierTransformCommandFlags Enumeration

Summary

Flags that indicate the transformation type, operation channel, frequency data type used to reconstruct the image, the clipping type, the used or computed frequencies range, the operation on the specified X harmonics range , and the operation on the specified Y harmonics range. This enumeration has a FlagsAttribute attribute that allows a bitwise combination of its member values.

Syntax

Objective-C

C++

[FlagsAttribute()] 
public enum DiscreteFourierTransformCommandFlags

<FlagsAttribute()> 
Public Enum DiscreteFourierTransformCommandFlags

typedef NS_OPTIONS(NSUInteger, LTDiscreteFourierTransformCommandFlags)

[FlagsAttribute()] 
public enum class DiscreteFourierTransformCommandFlags

Members

Value	Member	Description
0x00000000	None	No change.
0x00000001	DiscreteFourierTransform	Convert the image into frequency domain and store the results in the Data property of the FourierTransformInformation object.
0x00000002	InverseDiscreteFourierTransform	Construct an image using the frequency components from the Data property of the FourierTransformInformation object. This option will change the values of the Data property.
0x00000010	Blue	Use the blue channel.
0x00000020	Green	Use the green channel.
0x00000030	Red	Use the red channel.
0x00000040	Gray	Use the master channel. If this flag is combined with InverseDiscreteFourierTransform, the reconstructed image will be gray. In order to speed up widely used image processing filters in LEADTOOLS, the grayscale value (master channel) of a colored image is calculated using the following formulas: #define CalcGrayValue(r, g, b) ((L_UCHAR)(((L_UCHAR) (((2 * (L_UINT) (r)) + (5 * (L_UINT) (g)) + (L_UINT) (b) + 4) / 8)))) #define CalcGrayValue16(r, g, b) ((L_UINT16) (((2 * (L_UINT32) (r)) + (5 * (L_UINT32) (g)) + (L_UINT32) (b) + 4) / 8)) #define CalcGrayValue32(r, g, b) ((L_UINT32) (((2 * (L_UINT32) (r)) + (5 * (L_UINT32) (g)) + (L_UINT32) (b) + 4) / 8))
0x00000100	Magnitude	Construct the image from the frequency magnitude data only.
0x00000200	Phase	Construct the image from frequency phase data only.
0x00000300	Both	Construct the image from both magnitude and phase data.
0x00001000	Clip	Clip the constructed image values so they are between 0 and 255.
0x00002000	Scale	Scale the constructed image values so they are between 0 and 255.
0x00010000	All	Use or compute all harmonics. If this flag is used the range rectangle and the range flags will be ignored.
0x00020000	Range	Use or compute the harmonics specified in the range rectangle.
0x00100000	InsideX	Use or compute only the X harmonics inside the X range and ignore those outside the range.
0x00200000	OutsideX	Use or compute only the X harmonics outside the X range and ignore those inside the range.
0x01000000	InsideY	Use or compute only the Y harmonics inside the Y range and ignore those outside the range.
0x02000000	OutsideY	Use or compute only the Y harmonics outside the Y range and ignore those inside the range.

Remarks

You can use a bitwise OR ( ¦ ) to specify one flag from each group.

Group	Flags
Flags that represent the transformation type	DiscreteFourierTransform, InverseDiscreteFourierTransform
Flags that represent the operation channel type	Blue, Green, Red, Gray
Flags that represent the frequency data type used for constructing the image: this flag is used only if InverseDiscreteFourierTransform is set and will be ignored if DiscreteFourierTransform is set	Magnitude, Phase, Both
Flags that represent the clipping type. This flag is used only if InverseDiscreteFourierTransform is set and will be ignored if FFT_FFT is set	Clip, Scale
Flags that represent which harmonics are used	All, Range
Flags that represent the operations on the X Harmonics range	InsideX, OutsideX
Flags that represent the operations on the Y Harmonics range	InsideY, OutsideY

Requirements

Target Platforms

Reference

Leadtools.ImageProcessing.Core Namespace

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Leadtools.ImageProcessing.Core Assembly

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Leadtools.ImageProcessing.Core Namespace

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