Channel Property

Summary

Gets or sets the channel for which to get the information.

Syntax

Objective-C

C++

Java

public RasterColorChannel Channel { get; set; }

Public Property Channel As RasterColorChannel

@property (nonatomic, assign) LTRasterColorChannel channel

public RasterColorChannel getChannel() 
public void setChannel(RasterColorChannel value)

public: 
property RasterColorChannel Channel { 
   RasterColorChannel get(); 
   void set (    RasterColorChannel ); 
}

Property Value

The channel for which to get the information. This value is ignored if the image is 12 or 16-bit grayscale.

Remarks

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))

Example

Refer to StatisticsInformationCommand example.

Requirements

Target Platforms