/// <summary>
/// Get the histogram of a specific area of the image.
/// The histogram is separate for each color channel
/// </summary>
/// <param name="image"></param>
/// <param name="Min"></param>
/// <param name="Max"></param>
/// <param name="lines"></param>
/// <returns></returns>
public static FxVector<float>[] GetHistogram(FxImages image, FxVector2i Min, FxVector2i Max)
{
FxVector<float>[] hist = new FxVectorF[image.FXPixelFormat.Length];
for (int i = 0; i < image.FXPixelFormat.Length; i++)
{
hist[i] = new FxVectorF(256,0);
}
int pixelCount = 0;
// lock the input memory
//image.LockImage();
for (int i = Min.X; i < Max.X; i++)
{
for (int j = Min.Y; j < Max.Y; j++)
{
for (int g = 0; g < image.FXPixelFormat.Length; g++)
{
hist[g][image[i, j, (RGB)g]]++;
}
// count the pixels
pixelCount++;
}
}
// unlock the input and output image
//image.UnLockImage();
// normalize the image
for (int i = 0; i < image.FXPixelFormat.Length; i++)
{
hist[i].Divide(pixelCount);
}
return hist;
}
/// <summary>
/// Fill Circle
/// </summary>
/// <param name="Center"></param>
/// <param name="Radius"></param>
/// <param name="Value"></param>
public void FillCircle(Vector.FxVector2f center, float radius, float Value)
{
// Create a rectangle that we are going to fill
FxVector2i StartVect = new FxVector2i(center.x - radius, center.y - radius);
FxVector2i EndVect = new FxVector2i(center.x + radius, center.y + radius);
for (int x = StartVect.x; x < EndVect.x; x++)
for (int y = StartVect.y; y < EndVect.y; y++)
{
if (x >= 0 && x < Width && y >= 0 && y < Height)
{
float dist = center.Distance(x, y);
if (dist < radius)
{
float a = (radius - dist) / radius;
this[x, y] = a * Value;
}
}
}
}
