Get the "energy" of a pixel
using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.Drawing.Imaging;
namespace SEAMonster.EnergyFunctions
{
public static class Common
{
// Get the "energy" of a pixel
// If outside the bounds of the bitmap, return maximum energy value
public static byte GetPixel(BitmapData bmd, Size size, int x, int y)
{
if (x >= 0 && x < size.Width && y >= 0 && y < size.Height)
{
unsafe
{
byte* row = (byte*)bmd.Scan0 + (y * bmd.Stride) + (x * 3);
return (byte)((0.2126 * row[2]) + (0.7152 * row[1]) + (0.0722 * row[0]));
}
}
else
{
// Pixel is out of bounds, so return maximum energy
return byte.MaxValue;
}
}
public static byte GetColor(BitmapData bmd, Size size, int x, int y, int index)
{
if (x >= 0 && x < size.Width && y >= 0 && y < size.Height)
{
unsafe
{
byte* row = (byte*)bmd.Scan0 + (y * bmd.Stride) + (x * 3);
return row[index];
}
}
else
{
// Pixel is out of bounds, so return maximum energy
return byte.MaxValue;
}
}
}
}
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