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HistogramCommandFlags Enumeration

Summary

Flags that indicate which channel to use.

Syntax
C#
VB
Java
Objective-C
C++
[FlagsAttribute()] 
public enum HistogramCommandFlags   
<FlagsAttribute()> 
Public Enum HistogramCommandFlags  
typedef NS_OPTIONS(NSUInteger, LTHistogramCommandFlags) 
public enum HistogramCommandFlags 
[FlagsAttribute()] 
public enum class HistogramCommandFlags   

Members
ValueMemberDescription
0x00000000LowHighBits Use only the bits between the LowBit and HighBit values.
0x00000000Master All channels.

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))
0x00000001Red Red channel only.
0x00000002Green Green channel only.
0x00000003Blue Blue channel only.
0x00000010AllBits Use all the bits for calculating the histogram (the LowBit and HighBit values are ignored.)
0x00000100Force256 Force the resulted histogram array to 256 entries length.

Requirements

Target Platforms

Help Version 20.0.2019.3.11
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Leadtools.ImageProcessing.Color Assembly