public class RemapHueCommand : RasterCommand
Public Class RemapHueCommand
Inherits RasterCommand
@interface LTRemapHueCommand : LTRasterCommand
public class RemapHueCommand extends RasterCommand
public ref class RemapHueCommand : public RasterCommand
For more information, refer to Changing Brightness and Contrast.
Run the RemapHueCommand on an image and change all green hues (and hues near green).
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing.Color;
public int INCREMENT_S1(int x, int Length)
{
return ((x + 1) % Length);
}
public int DECREMENT_S1(int x, int Length)
{
return ((x + (Length - 1)) % Length);
}
public int ADD_S1(int x, int y, int Length)
{
return ((x + y) % Length);
}
public void RemapHueCommandCommandExample()
{
// Load an image
RasterCodecs codecs = new RasterCodecs();
codecs.ThrowExceptionsOnInvalidImages = true;
RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "cannon.jpg"));
// Prepare the command
int[] MaskTable;
int[] HueTable;
RasterHsvColor hsvRef;
int HueGreen, HueChange;
int Change;
int i, Count;
int Length;
if (image.BitsPerPixel >= 48)
Length = 0x10000;
else if (!(image.BitsPerPixel == 16 || image.BitsPerPixel == 12))
Length = 256;
else if (image.GetLookupTable() != null && image.UseLookupTable)
Length = 256;
else
Length = (1 << image.BitsPerPixel);
//Allocate tables
MaskTable = new int[Length];
HueTable = new int[Length];
//Initialize tables
for (i = 0; i < Length; i++)
{
MaskTable[i] = 0;
HueTable[i] = i;
}
//Get the hue for green
hsvRef = RasterHsvColor.FromRasterColor(new RasterColor(0, 255, 0));
HueGreen = hsvRef.H;
//Obtain new hue
hsvRef = RasterHsvColor.FromRasterColor(new RasterColor(255, 128, 0));
Change = (int)hsvRef.H - (int)HueGreen;
HueChange = (Change > 0) ? (int)Change : (int)(Change + Length - 1);
HueGreen *= (Length - 1) / 255;
HueChange *= (Length - 1) / 255;
//Set values in HueTable, MaskTable
HueTable[HueGreen] = (HueTable[HueGreen] + HueChange);
MaskTable[HueGreen] = 1;
//set the hues near green (+/- 15)
Count = (15 * (Length - 1)) / 255;
for (i = INCREMENT_S1(HueGreen, Length); Count > 0; i = INCREMENT_S1(i, Length), Count--)
{
HueTable[i] = ADD_S1(HueTable[i], HueChange, Length);
MaskTable[i] = 1;
}
Count = (15 * (Length - 1)) / 255;
for (i = DECREMENT_S1(HueGreen, Length); Count > 0; i = DECREMENT_S1(i, Length), Count--)
{
HueTable[i] = ADD_S1(HueTable[i], HueChange, Length);
MaskTable[i] = 1;
}
RemapHueCommand command = new RemapHueCommand(MaskTable, HueTable, null, null, Length);
command.Run(image);
codecs.Save(image, Path.Combine(LEAD_VARS.ImagesDir, "Result.jpg"), RasterImageFormat.Jpeg, 24);
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\LEADTOOLS21\Resources\Images";
}
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing.Color
Public Function INCREMENT_S1(ByVal x As Integer, ByVal Length As Integer) As Integer
Return ((x + 1) Mod Length)
End Function
Public Function DECREMENT_S1(ByVal x As Integer, ByVal Length As Integer) As Integer
Return ((x + (Length - 1)) Mod Length)
End Function
Public Function ADD_S1(ByVal x As Integer, ByVal y As Integer, ByVal Length As Integer) As Integer
Return ((x + y) Mod Length)
End Function
Public Sub RemapHueCommandCommandExample()
Dim codecs As New RasterCodecs()
codecs.ThrowExceptionsOnInvalidImages = True
Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "cannon.jpg"))
' Prepare the command
Dim MaskTable() As Integer
Dim HueTable() As Integer
Dim hsvRef As RasterHsvColor
Dim HueGreen As Integer
Dim HueChange As Integer
Dim Change As Integer
Dim i As Integer
Dim Count As Integer
Dim Length As Integer
If (leadImage.BitsPerPixel >= 48) Then
Length = 65536
ElseIf (Not (leadImage.BitsPerPixel = 16 Or leadImage.BitsPerPixel = 12)) Then
Length = 256
ElseIf (IsNothing(leadImage.GetLookupTable) And leadImage.UseLookupTable) Then
Length = 256
Else
Length = (1 << leadImage.BitsPerPixel)
End If
'Allocate tables
ReDim MaskTable(Length - 1)
ReDim HueTable(Length - 1)
'Initialize tables
For i = 0 To Length - 1
MaskTable(i) = 0
HueTable(i) = i
Next
'Get the hue for green
hsvRef = RasterHsvColor.FromRasterColor(New RasterColor(0, 255, 0))
HueGreen = hsvRef.H
'Obtain new hue
hsvRef = RasterHsvColor.FromRasterColor(New RasterColor(255, 128, 0))
Change = hsvRef.H - HueGreen
If (Change > 0) Then
HueChange = Change
Else
HueChange = Change + Length - 1
End If
HueGreen = (HueGreen * (Length - 1)) \ 255
HueChange = (HueChange * (Length - 1)) \ 255
'Set values in HueTable, MaskTable
HueTable(HueGreen) = HueTable(HueGreen) + HueChange
MaskTable(HueGreen) = 1
'set the hues near green (+/- 15)
i = INCREMENT_S1(HueGreen, Length)
For Count = (15 * (Length - 1)) \ 255 To 1 Step -1
i = INCREMENT_S1(i, Length)
HueTable(i) = ADD_S1(HueTable(i), HueChange, Length)
MaskTable(i) = 1
Next
i = DECREMENT_S1(HueGreen, Length)
For Count = (15 * (Length - 1)) \ 255 To 1 Step -1
i = DECREMENT_S1(i, Length)
HueTable(i) = ADD_S1(HueTable(i), HueChange, Length)
MaskTable(i) = 1
Next
Dim command As RemapHueCommand = New RemapHueCommand(MaskTable, HueTable, Nothing, Nothing, Length)
command.Run(leadImage)
codecs.Save(leadImage, Path.Combine(LEAD_VARS.ImagesDir, "Result.jpg"), RasterImageFormat.Jpeg, 24)
End Sub
Public NotInheritable Class LEAD_VARS
Public Const ImagesDir As String = "C:\LEADTOOLS21\Resources\Images"
End Class
Leadtools.ImageProcessing.Color Namespace
Changing Brightness and Contrast
HistogramContrastCommand Class
HistogramEqualizeCommand Class
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