private static void BilinearInterpolation <TPixelType>(Image <TPixelType> image, PixelInterpolationOperator <TPixelType> pixelOperator, int width, int height)
{
var originalImage = image.Copy();
image.Initialize(width, height);
var rw = (double)originalImage.Width / image.Width;
var rh = (double)originalImage.Height / image.Height;
image.ForEach((x, y) =>
{
var xrw = x * rw;
var yrh = y * rh;
var m = originalImage.ClampWidth((int)xrw);
var n = originalImage.ClampWidth((int)yrh);
var x0 = originalImage.ClampWidth(m);
var y0 = originalImage.ClampHeight(n);
var x1 = originalImage.ClampWidth(x0 + 1);
var y1 = originalImage.ClampHeight(y0 + 1);
var a = xrw % m;
if (double.IsNaN(a))
{
a = 0;
}
var b = yrh % n;
if (double.IsNaN(b))
{
b = 0;
}
var p00 = originalImage.Get(x0, y0);
var p01 = originalImage.Get(x0, y1);
var p10 = originalImage.Get(x1, y0);
var p11 = originalImage.Get(x1, y1);
var newPixel = pixelOperator(p00, p01, p10, p11, a, b);
image.Set(x, y, newPixel);
});
}
private static Image <TPixelType> Resize <TPixelType>(this Image <TPixelType> image, PixelInterpolationOperator <TPixelType> pixelOperator, int width, int height, ResizeMethod method)
{
switch (method)
{
case ResizeMethod.BilinearInterpolation:
BilinearInterpolation(image, pixelOperator, width, height);
break;
case ResizeMethod.NearestNeighbour:
image.Resize(width, height);
break;
}
return(image);
}
