private PixelState[,] InitializePixels()
{
PixelState[,] pixels = new PixelState[bmp.Width, bmp.Height];
BitmapData bmData = bmp.LockBits(new Rectangle(0, 0, bmp.Width, bmp.Height),
System.Drawing.Imaging.ImageLockMode.ReadOnly, bmp.PixelFormat);
for (int x = 0; x < bmp.Width; x++)
{
for (int y = 0; y < bmp.Height; y++)
{
int r, g, b;
NuGenImageProcessor.GetPixelAt(bmData, x, y, out r, out g, out b);
if ((Math.Round(((double)Math.Max(Math.Max(r, g), b)) * 255.0 / 100.0)) < 50)
{
pixels[x, y] = PixelState.PixelOn;
}
else
{
pixels[x, y] = PixelState.PixelOff;
}
}
}
bmp.UnlockBits(bmData);
return(pixels);
}
//Discretizes the image, switching through the different modes of discretization
public void Discretize()
{
int value;
BitmapData bmData = bmp.LockBits(new Rectangle(0, 0, bmp.Width, bmp.Height),
ImageLockMode.ReadOnly, bmp.PixelFormat);
for (int x = 0; x < bmp.Width; x++)
{
for (int y = 0; y < bmp.Height; y++)
{
if (settings.discretizeMethod == DiscretizeMethod.DiscretizeForeground)
{
value = DiscretizeValueForeground(x, y, bmData);
}
else
{
value = DiscretizeValue(x, y, bmData);
}
if (PixelIsOn(value))
{
NuGenImageProcessor.SetPixelAt(bmData, x, y, 0, 0, 0);
}
else
{
NuGenImageProcessor.SetPixelAt(bmData, x, y, 255, 255, 255);
}
}
}
bmp.UnlockBits(bmData);
}
private static void TestGetPixels()
{
Image img = Image.FromFile("samples\\gridlines.gif");
Bitmap b = new Bitmap(img);
BitmapData bmData = b.LockBits(new Rectangle(0, 0, b.Width, b.Height),
ImageLockMode.ReadOnly, b.PixelFormat);
NuGenImageProcessor.SetPixelAt(bmData, 242, 133, 64, 65, 66);
int r, g, blue;
NuGenImageProcessor.GetPixelAt(bmData, 242, 133, out r, out g, out blue);
Color c = Color.FromArgb(r, g, blue);
b.UnlockBits(bmData);
Color cb = b.GetPixel(242, 133);
if (!(c.R == 64 && c.G == 65 && c.B == 66))
{
throw new Exception("Failure");
}
if (!(c.R == cb.R && c.G == cb.G && c.B == cb.B))
{
throw new Exception("Failure");
}
}
//Discretizes a value and takes the bitmap data object so that when looping through the entire
// image the bits do not need to be repeatedly locked
public int DiscretizeValue(int x, int y, BitmapData bmData)
{
int h, s, v, r, g, b;
NuGenImageProcessor.GetPixelAt(bmData, x, y, out r, out g, out b);
NuGenImageProcessor.GetHSVFromRGB(r, g, b, out h, out s, out v);
double intensity;
// convert hue from 0 to 359, saturation from 0 to 255, value from 0 to 255
int value = 0;
switch (settings.discretizeMethod)
{
case DiscretizeMethod.DiscretizeForeground:
break;
case DiscretizeMethod.DiscretizeHue:
{
value = h * DiscretizeHueMax / 359;
break;
}
case DiscretizeMethod.DiscretizeIntensity:
{
intensity = Math.Sqrt(r * r + g * g + b * b);
value = (int)(intensity * DiscretizeIntensityMax / Math.Sqrt(255 * 255 + 255 * 255 + 255 * 255) + 0.5);
break;
}
case DiscretizeMethod.DiscretizeNone:
throw new InvalidOperationException("Can not discretize, discretizing is not enabled at this time");
case DiscretizeMethod.DiscretizeSaturation:
{
value = s * DiscretizeSaturationMax / 255;
break;
}
case DiscretizeMethod.DiscretizeValue:
{
value = v * DiscretizeValueMax / 255;
break;
}
}
if (value < 0)
{
value = 0;
}
if (ColorAttributeMax(settings.discretizeMethod) < value)
{
value = ColorAttributeMax(settings.discretizeMethod);
}
return(value);
}
private static void TestSetPixelAt()
{
Image img = Image.FromFile("samples\\gridlines.gif");
Bitmap b = new Bitmap(img);
BitmapData bmData = b.LockBits(new Rectangle(0, 0, b.Width, b.Height),
ImageLockMode.ReadWrite, b.PixelFormat);
NuGenImageProcessor.SetPixelAt(bmData, 100, 100, 255, 0, 0);
b.UnlockBits(bmData);
Color c = b.GetPixel(100, 100);
}
// remove gridlines from original image and discretize, then break processed image into segments
public void ProcessOriginialImage()
{
if (originalImage == null)
{
throw new InvalidOperationException("There is no original image to process");
}
imageProcessor = new NuGenImageProcessor(this);
imageProcessor.Process();
processedImage = imageProcessor.ProcessedImage;
bgColor = imageProcessor.BackgroundColor;
UpdateListeners();
}
//Tells whether a processed pixel is on, it is only only if it is black, off it is white
public static bool ProcessedPixelIsOn(BitmapData mbData, int x, int y)
{
if (x > mbData.Width || y > mbData.Height)
{
return(false);
}
int r, g, b;
NuGenImageProcessor.GetPixelAt(mbData, x, y, out r, out g, out b);
if (r == 0 && g == 0 && b == 0)
{
return(true);
}
return(false);
}
//Saves the pixel states to the image
private void SavePixels(PixelState[,] pixels, Color bgColor)
{
BitmapData bmData = bmp.LockBits(new Rectangle(0, 0, bmp.Width, bmp.Height),
ImageLockMode.ReadOnly, bmp.PixelFormat);
byte r = bgColor.R;
byte g = bgColor.G;
byte b = bgColor.B;
for (int x = 0; x < bmp.Width; x++)
{
for (int y = 0; y < bmp.Height; y++)
{
PixelState state = pixels[x, y];
if (state != PixelState.PixelOff && state != PixelState.PixelOn)
{
NuGenImageProcessor.SetPixelAt(bmData, x, y, r, g, b);
}
}
}
bmp.UnlockBits(bmData);
}
//Discretizes a value using the foreground method taking a bitmap data object, this method provides
// the best performance when looping through an entire image since it doesn't require the bitmap
// to be locked repeatedly
public int DiscretizeValueForeground(int x, int y, Color referenceColor, BitmapData bmData)
{
int r, g, b;
NuGenImageProcessor.GetPixelAt(bmData, x, y, out r, out g, out b);
int rBg = referenceColor.R;
int gBg = referenceColor.G;
int bBg = referenceColor.B;
double distance = Math.Sqrt((r - rBg) * (r - rBg) + (g - gBg) * (g - gBg) + (b - bBg) * (b - bBg));
int value = (int)(distance * DiscretizeForegroundMax / Math.Sqrt(255 * 255 + 255 * 255 + 255 * 255) + 0.5);
if (value < 0)
{
value = 0;
}
if (ColorAttributeMax(settings.discretizeMethod) < value)
{
value = ColorAttributeMax(settings.discretizeMethod);
}
return(value);
}