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Using convolution matrix for sharpen

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Jaex 2013-11-06 00:00:55 +02:00
parent 3acf893ce0
commit dd7dcefcb5
5 changed files with 183 additions and 12 deletions
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63
HelpersLib/ConvolutionMatrix.cs Normal file
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@ -0,0 +1,63 @@
#region License Information (GPL v3)
/*
ShareX - A program that allows you to take screenshots and share any file type
Copyright (C) 2008-2013 ShareX Developers
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
Optionally you can also view the license at <http://www.gnu.org/licenses/>.
*/
#endregion License Information (GPL v3)
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace HelpersLib
{
public class ConvolutionMatrix
{
public int Size { get; private set; }
public int[,] Matrix { get; set; }
public int Factor { get; set; }
public int Offset { get; set; }
public ConvolutionMatrix()
: this(3)
{
}
public ConvolutionMatrix(int size)
{
Size = size;
Matrix = new int[Size, Size];
Factor = 1;
}
public void SetAll(int value)
{
for (int y = 0; y < Size; y++)
{
for (int x = 0; x < Size; x++)
{
Matrix[x, y] = value;
}
}
}
}
}

111
HelpersLib/ConvolutionMatrixManager.cs Normal file
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@ -0,0 +1,111 @@
#region License Information (GPL v3)
/*
ShareX - A program that allows you to take screenshots and share any file type
Copyright (C) 2008-2013 ShareX Developers
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
Optionally you can also view the license at <http://www.gnu.org/licenses/>.
*/
#endregion License Information (GPL v3)
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.Linq;
using System.Text;
namespace HelpersLib
{
public static class ConvolutionMatrixManager
{
public static Image Apply(this ConvolutionMatrix matrix, Image img)
{
Bitmap result = (Bitmap)img.Clone();
using (UnsafeBitmap source = new UnsafeBitmap((Bitmap)img, true, ImageLockMode.ReadOnly))
using (UnsafeBitmap dest = new UnsafeBitmap(result, true, ImageLockMode.WriteOnly))
{
ColorBgra[,] pixelColor = new ColorBgra[3, 3];
ColorBgra color = new ColorBgra();
for (int y = 0; y < source.Height - 2; y++)
{
for (int x = 0; x < source.Width - 2; x++)
{
pixelColor[0, 0] = source.GetPixel(x, y);
pixelColor[0, 1] = source.GetPixel(x, y + 1);
pixelColor[0, 2] = source.GetPixel(x, y + 2);
pixelColor[1, 0] = source.GetPixel(x + 1, y);
pixelColor[1, 1] = source.GetPixel(x + 1, y + 1);
pixelColor[1, 2] = source.GetPixel(x + 1, y + 2);
pixelColor[2, 0] = source.GetPixel(x + 2, y);
pixelColor[2, 1] = source.GetPixel(x + 2, y + 1);
pixelColor[2, 2] = source.GetPixel(x + 2, y + 2);
color.Alpha = pixelColor[1, 1].Alpha;
color.Red = (byte)(((((pixelColor[0, 0].Red * matrix.Matrix[0, 0]) +
(pixelColor[1, 0].Red * matrix.Matrix[1, 0]) +
(pixelColor[2, 0].Red * matrix.Matrix[2, 0]) +
(pixelColor[0, 1].Red * matrix.Matrix[0, 1]) +
(pixelColor[1, 1].Red * matrix.Matrix[1, 1]) +
(pixelColor[2, 1].Red * matrix.Matrix[2, 1]) +
(pixelColor[0, 2].Red * matrix.Matrix[0, 2]) +
(pixelColor[1, 2].Red * matrix.Matrix[1, 2]) +
(pixelColor[2, 2].Red * matrix.Matrix[2, 2])) / matrix.Factor) + matrix.Offset).Between(0, 255));
color.Green = (byte)(((((pixelColor[0, 0].Green * matrix.Matrix[0, 0]) +
(pixelColor[1, 0].Green * matrix.Matrix[1, 0]) +
(pixelColor[2, 0].Green * matrix.Matrix[2, 0]) +
(pixelColor[0, 1].Green * matrix.Matrix[0, 1]) +
(pixelColor[1, 1].Green * matrix.Matrix[1, 1]) +
(pixelColor[2, 1].Green * matrix.Matrix[2, 1]) +
(pixelColor[0, 2].Green * matrix.Matrix[0, 2]) +
(pixelColor[1, 2].Green * matrix.Matrix[1, 2]) +
(pixelColor[2, 2].Green * matrix.Matrix[2, 2])) / matrix.Factor) + matrix.Offset).Between(0, 255));
color.Blue = (byte)(((((pixelColor[0, 0].Blue * matrix.Matrix[0, 0]) +
(pixelColor[1, 0].Blue * matrix.Matrix[1, 0]) +
(pixelColor[2, 0].Blue * matrix.Matrix[2, 0]) +
(pixelColor[0, 1].Blue * matrix.Matrix[0, 1]) +
(pixelColor[1, 1].Blue * matrix.Matrix[1, 1]) +
(pixelColor[2, 1].Blue * matrix.Matrix[2, 1]) +
(pixelColor[0, 2].Blue * matrix.Matrix[0, 2]) +
(pixelColor[1, 2].Blue * matrix.Matrix[1, 2]) +
(pixelColor[2, 2].Blue * matrix.Matrix[2, 2])) / matrix.Factor) + matrix.Offset).Between(0, 255));
dest.SetPixel(x + 1, y + 1, color);
}
}
}
return result;
}
public static ConvolutionMatrix Sharpen(int weight = 11)
{
ConvolutionMatrix matrix = new ConvolutionMatrix();
matrix.SetAll(0);
matrix.Matrix[1, 1] = weight;
matrix.Matrix[1, 0] = matrix.Matrix[0, 1] = matrix.Matrix[2, 1] = matrix.Matrix[1, 2] = -2;
matrix.Factor = Math.Max(weight - 8, 1);
return matrix;
}
}
}

4
HelpersLib/Helpers/ImageHelpers.cs
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@ -850,9 +850,7 @@ public static Bitmap Sharpen(Image image, double strength)
// Lock image bits for read/write.
if (sharpenImage != null)
{
BitmapData pbits = sharpenImage.LockBits(new Rectangle(0, 0, width, height),
ImageLockMode.ReadWrite,
PixelFormat.Format24bppRgb);
BitmapData pbits = sharpenImage.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
// Declare an array to hold the bytes of the bitmap.
int bytes = pbits.Stride * height;

2
HelpersLib/HelpersLib.csproj
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@ -84,6 +84,8 @@
<Compile Include="Colors\HSB.cs" />
<Compile Include="Colors\MyColor.cs" />
<Compile Include="Colors\RGBA.cs" />
<Compile Include="ConvolutionMatrix.cs" />
<Compile Include="ConvolutionMatrixManager.cs" />
<Compile Include="Helpers\ClipboardHelpers.cs" />
<Compile Include="ColorBgra.cs" />
<Compile Include="Cryptographic\Crc32.cs" />

15
ImageEffectsLib/Filters/Sharpen.cs
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@ -31,17 +31,14 @@ namespace ImageEffectsLib
{
internal class Sharpen : ImageEffect
{
[DefaultValue(1.0d)]
public double Strength { get; set; }
public Sharpen()
{
this.ApplyDefaultPropertyValues();
}
public override Image Apply(Image img)
{
return ImageHelpers.Sharpen(img, Strength);
//return ImageHelpers.Sharpen(img, Strength);
using (img)
{
return ConvolutionMatrixManager.Sharpen().Apply(img);
}
}
}
}