←Select platform

Channel Property

Summary

Gets or sets a flag that indicates the channel for which to get the histogram and the bits to use in calculating the histogram.

Syntax

C#
VB
Java
Objective-C
WinRT C#
C++
public HistogramCommandFlags Channel { get; set; } 
@property (nonatomic, assign) LTHistogramCommandFlags channel 
public int getChannel() 
public void setChannel(int value) 
              
 <br/>get_Channel();<br/>set_Channel(value);<br/>Object.defineProperty('Channel');  

Property Value

Value that indicates the channel for which to get the histogram and the bits to use in calculating the histogram.

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 HistogramCommand.

Requirements

Target Platforms

Help Version 19.0.2017.10.27
Products | Support | Contact Us | Copyright Notices
© 1991-2017 LEAD Technologies, Inc. All Rights Reserved.

Leadtools.ImageProcessing.Color Assembly