/// <summary>
/// HSL to RGB image
/// </summary>
/// <param name="source">image source</param>
/// <param name="dest">image destination</param>
public void HslToRgb(IImage2DFloatRgbA source, IImage2DFloatRgbA dest)
{
if (source == null) throw new ArgumentNullException("source");
if (dest == null) throw new ArgumentNullException("dest");
if ((source.Width > dest.Width) || (source.Height > dest.Height)) throw new ArgumentException("Destination image (" + dest.Width + "x" + dest.Height + ") must have at least the same size as the source image (" + source.Width + "x" + source.Height + ")");
if (source.Normalized)
{
// use normalized kernel
// TODO: HSL to RGB image (normalized)
}
else
{
// use normal kernel
// TODO: HSL to RGB image
}
dest.Normalized = source.Normalized;
}
/// <summary>
/// RGB to HSL image
/// </summary>
/// <param name="source">image source</param>
/// <param name="dest">image destination</param>
public void RgbToHsl(IImage2DFloatRgbA source, IImage2DFloatRgbA dest)
{
if (source == null) throw new ArgumentNullException("source");
if (dest == null) throw new ArgumentNullException("dest");
if ((source.Width > dest.Width) || (source.Height > dest.Height)) throw new ArgumentException("Destination image (" + dest.Width + "x" + dest.Height + ") must have at least the same size as the source image (" + source.Width + "x" + source.Height + ")");
if (source.Normalized)
{
// use normalized kernel
for (int i = 0, j = 0, length = source.HostBuffer.Length; i < length;)
{
Color color = Color.FromArgb((int)(source.HostBuffer[i++] * 255f), (int)(source.HostBuffer[i++] * 255f), (int)(source.HostBuffer[i++] * 255f));
dest.HostBuffer[j++] = color.GetHue() / 360f;
dest.HostBuffer[j++] = color.GetSaturation();
dest.HostBuffer[j++] = color.GetBrightness();
dest.HostBuffer[j++] = source.HostBuffer[i++];
}
}
else
{
// use normal kernel
for (int i = 0, j = 0, length = source.HostBuffer.Length; i < length; )
{
Color color = Color.FromArgb((int)source.HostBuffer[i++], (int)source.HostBuffer[i++], (int)source.HostBuffer[i++]);
dest.HostBuffer[j++] = color.GetHue() * 255f / 360f;
dest.HostBuffer[j++] = color.GetSaturation() * 255f;
dest.HostBuffer[j++] = color.GetBrightness() * 255f;
dest.HostBuffer[j++] = source.HostBuffer[i++];
}
}
dest.Normalized = source.Normalized;
}
/// <summary>
/// GrayScale image
/// </summary>
/// <param name="source">image source</param>
/// <param name="dest">image destination</param>
public void GrayScale(IImage2DFloatRgbA source, IImage2DFloatA dest)
{
if (source == null) throw new ArgumentNullException("source");
if (dest == null) throw new ArgumentNullException("dest");
if ((source.Width > dest.Width) || (source.Height > dest.Height)) throw new ArgumentException("Destination image (" + dest.Width + "x" + dest.Height + ") must have at least the same size as the source image (" + source.Width + "x" + source.Height + ")");
int length = source.Width * source.Height;
int pos = 0;
for (int i = 0; i < length; i++)
{
float gray = 0.2989f * source.HostBuffer[pos++] + 0.5870f * source.HostBuffer[pos++] + 0.1140f * source.HostBuffer[pos++];
pos++;
dest.HostBuffer[i] = gray;
}
dest.Normalized = source.Normalized;
}
/// <summary>
/// Flip image Y coordinate
/// </summary>
/// <param name="source">image source</param>
/// <param name="dest">image destination</param>
public void FlipY(IImage2DFloatRgbA source, IImage2DFloatRgbA dest)
{
if (source == null) throw new ArgumentNullException("source");
if (dest == null) throw new ArgumentNullException("dest");
if (source == dest) throw new ArgumentException("Flipping kernel is not designed to run inline therefore source and destination must be different images");
if ((source.Width > dest.Width) || (source.Height > dest.Height)) throw new ArgumentException("Destination image (" + dest.Width + "x" + dest.Height + ") must have at least the same size as the source image (" + source.Width + "x" + source.Height + ")");
var sBuf = source.HostBuffer;
var dBuf = dest.HostBuffer;
int posSource = 0;
int posDest = 4 * (source.Height - 1) * dest.Width;
for (int y = 0, h = source.Height; y < h; y++)
{
for (int x = 0, w = source.Width; x < w; x++)
{
float color;
color = sBuf[posSource++]; dBuf[posDest++] = color;
color = sBuf[posSource++]; dBuf[posDest++] = color;
color = sBuf[posSource++]; dBuf[posDest++] = color;
color = sBuf[posSource++]; dBuf[posDest++] = color;
}
posDest -= 4 * (dest.Width + source.Width);
}
}
/// <summary>
/// Extracts a channel of an RGB image
/// </summary>
/// <param name="source">image source</param>
/// <param name="dest">image destination</param>
/// <param name="offset">offset (0..3)</param>
public void ExtractChannel(IImage2DFloatRgbA source, IImage2DFloatA dest, byte offset)
{
if (source == null) throw new ArgumentNullException("source");
if (dest == null) throw new ArgumentNullException("dest");
if (offset > 3) throw new ArgumentOutOfRangeException("offset", String.Format("offset must be between 0..3 but was {0}", offset));
if ((source.Width > dest.Width) || (source.Height > dest.Height)) throw new ArgumentException("Destination image (" + dest.Width + "x" + dest.Height + ") must have at least the same size as the source image (" + source.Width + "x" + source.Height + ")");
int length = source.Width * source.Height;
int pos = 0;
for (int i = 0; i < length; i++)
for (int j = 0; j < 4; j++)
if (j == offset) dest.HostBuffer[i] = source.HostBuffer[pos++]; else pos++;
dest.Normalized = source.Normalized;
}
/// <summary>
/// Box blur image
/// </summary>
/// <param name="source">image source</param>
/// <param name="dest">image destination</param>
/// <param name="sampler">sampler to be used for image reading</param>
/// <param name="offset">offset</param>
public void BoxBlur(IImage2DFloatRgbA source, IImage2DFloatRgbA dest, int offset)
{
if (source == null) throw new ArgumentNullException("source");
if (dest == null) throw new ArgumentNullException("dest");
if ((source.Width > dest.Width) || (source.Height > dest.Height)) throw new ArgumentException("Destination image (" + dest.Width + "x" + dest.Height + ") must have at least the same size as the source image (" + source.Width + "x" + source.Height + ")");
// TODO: Box blur image
dest.Normalized = source.Normalized;
}
/// <summary>
/// Sets channel of a RGBA image
/// </summary>
/// <param name="source">source image</param>
/// <param name="mask">mask image</param>
/// <param name="dest">destination image</param>
/// <param name="offset">offset (0..3)</param>
public void SetChannel(IImage2DFloatRgbA source, IImage2DFloatA mask, IImage2DFloatRgbA dest, byte offset)
{
if (source == null) throw new ArgumentNullException("source");
if (mask == null) throw new ArgumentNullException("mask");
if (dest == null) throw new ArgumentNullException("dest");
if (offset > 3) throw new ArgumentOutOfRangeException("offset", String.Format("offset must be between 0..3 but was {0}", offset));
if ((source.Width > mask.Width) || (source.Height > mask.Height)) throw new ArgumentException("Image mask (" + dest.Width + "x" + dest.Height + ") must have at least the same size as the source image (" + source.Width + "x" + source.Height + ")");
if ((source.Width > dest.Width) || (source.Height > dest.Height)) throw new ArgumentException("Destination image (" + dest.Width + "x" + dest.Height + ") must have at least the same size as the source image (" + source.Width + "x" + source.Height + ")");
int length = source.Width * source.Height;
int pos = 0;
for (int i = 0; i < length; i++)
for (int j = 0; j < 4; j++)
{
dest.HostBuffer[pos] = (j == offset) ? mask.HostBuffer[i] : source.HostBuffer[pos];
pos++;
}
}
