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HistogramCommandFlags Enumeration

Summary
Flags that indicate which channel to use.
Syntax
C#
Objective-C
C++/CLI
Java
Python
[FlagsAttribute()] 
public enum HistogramCommandFlags   
typedef NS_OPTIONS(NSUInteger, LTHistogramCommandFlags) 
public final class HistogramCommandFlags 
    extends java.lang.Enum<HistogramCommandFlags> 
[FlagsAttribute()] 
public enum class HistogramCommandFlags   
class HistogramCommandFlags(Enum): 
   Master = 0 
   Master = 0 
   LowHighBits, Red = 1 
   LowHighBits, Green = 2 
   LowHighBits, Blue = 3 
   LowHighBits, AllBits = 16 
   LowHighBits, Force256 = 256 
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 23.0.2024.3.3
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Leadtools.ImageProcessing.Color Assembly

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© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.