// 最近邻插值
private ImageIO NearestNeighborInterpolationCore()
{
ImageIO processed = new ImageIO(null, this.InterpolationParameter.TargetWidth, this.InterpolationParameter.TargetHeight);
processed.LockBits();
double widthFactor = Convert.ToDouble(this.ImageParameter.SourceImage.Width - 1) / Convert.ToDouble(this.InterpolationParameter.TargetWidth - 1);
double heightFactor = Convert.ToDouble(this.ImageParameter.SourceImage.Height - 1) / Convert.ToDouble(this.InterpolationParameter.TargetHeight - 1);
//并行计算
Info infoBox = new Info();
infoBox.Show();
Parallel.For(0, this.InterpolationParameter.TargetHeight, y =>
{
Parallel.For(0, this.InterpolationParameter.TargetWidth, x =>
{
Poseition transformPoseition = this.TransformFunction(Convert.ToDouble(x) * widthFactor, Convert.ToDouble(y) * heightFactor);
Poseition interpolatePosition = new Poseition(transformPoseition.X * widthFactor, transformPoseition.Y * heightFactor);
if (transformPoseition.X < 0 || transformPoseition.X > (this.ImageParameter.SourceImage.Width - 1) || transformPoseition.Y < 0 || transformPoseition.Y > (this.ImageParameter.SourceImage.Height - 1))
{
if (this.Stretch)
{
Poseition newPoseition = new Poseition(Math.Max(0, Math.Min(this.ImageParameter.SourceImage.Width - 1, transformPoseition.X)), Math.Max(0, Math.Min(this.ImageParameter.SourceImage.Height - 1, transformPoseition.Y)));
System.Drawing.Color rgb = this.ImageParameter.SourceImage.GetPixel(Convert.ToInt32(newPoseition.X), Convert.ToInt32(newPoseition.Y));
processed.SetPixel(x, y, rgb);
}
else
{
System.Drawing.Color rgb = System.Drawing.Color.FromArgb(0, 0, 0);
processed.SetPixel(x, y, rgb);
}
}
else
{
Poseition newPoseition = new Poseition(Math.Max(0, Math.Min(this.ImageParameter.SourceImage.Width - 1, transformPoseition.X)), Math.Max(0, Math.Min(this.ImageParameter.SourceImage.Height - 1, transformPoseition.Y)));
System.Drawing.Color rgb = this.ImageParameter.SourceImage.GetPixel(Convert.ToInt32(newPoseition.X), Convert.ToInt32(newPoseition.Y));
processed.SetPixel(x, y, rgb);
}
});
});
infoBox.Close();
Success successBox = new Success();
successBox.ShowDialog();
processed.UnlockBits();
return(processed);
}
// 双三次插值
private ImageIO BiCubicInterpolationCore()
{
ImageIO processed = new ImageIO(null, this.InterpolationParameter.TargetWidth, this.InterpolationParameter.TargetHeight);
processed.LockBits();
double widthFactor = Convert.ToDouble(this.ImageParameter.SourceImage.Width - 1) / Convert.ToDouble(this.InterpolationParameter.TargetWidth - 1);
double heightFactor = Convert.ToDouble(this.ImageParameter.SourceImage.Height - 1) / Convert.ToDouble(this.InterpolationParameter.TargetHeight - 1);
//并行计算
Info infoBox = new Info();
infoBox.Show();
Parallel.For(0, this.InterpolationParameter.TargetHeight, y =>
{
Parallel.For(0, this.InterpolationParameter.TargetWidth, x =>
{
Poseition transformPoseition = this.TransformFunction(Convert.ToDouble(x) * widthFactor, Convert.ToDouble(y) * heightFactor);
Poseition interpolatePosition = new Poseition(transformPoseition.X - 0.5, transformPoseition.Y - 0.5);
if (transformPoseition.X < 0 || transformPoseition.X > (this.ImageParameter.SourceImage.Width - 1) || transformPoseition.Y < 0 || transformPoseition.Y > (this.ImageParameter.SourceImage.Height - 1))
{
if (this.Stretch)
{
double[] source_pixels_weight_sum = { 0, 0, 0 };
byte[] rgb = { 0, 0, 0 };
Parallel.For(0, 4, y_index =>
{
Parallel.For(0, 4, x_index =>
{
Poseition dPosition = new Poseition(-interpolatePosition.X + Convert.ToInt32(interpolatePosition.X) + x_index - 1, -interpolatePosition.Y + Convert.ToInt32(interpolatePosition.Y) + y_index - 1);
Poseition positionWeight = new Poseition(BiCubicWeight(dPosition.X, this.InterpolationParameter.BicubicFactor), BiCubicWeight(dPosition.Y, this.InterpolationParameter.BicubicFactor));
Poseition indexPosition = new Poseition(Math.Max(0, Math.Min(this.ImageParameter.SourceImage.Width - 1, Convert.ToInt32(interpolatePosition.X) + x_index - 1)), Math.Max(0, Math.Min(this.ImageParameter.SourceImage.Height - 1, Convert.ToInt32(interpolatePosition.Y) + y_index - 1)));
source_pixels_weight_sum[0] += Convert.ToDouble(this.ImageParameter.SourceImage.GetPixel(Convert.ToInt32(indexPosition.X), Convert.ToInt32(indexPosition.Y)).R) * positionWeight.X * positionWeight.Y;
source_pixels_weight_sum[1] += Convert.ToDouble(this.ImageParameter.SourceImage.GetPixel(Convert.ToInt32(indexPosition.X), Convert.ToInt32(indexPosition.Y)).G) * positionWeight.X * positionWeight.Y;
source_pixels_weight_sum[2] += Convert.ToDouble(this.ImageParameter.SourceImage.GetPixel(Convert.ToInt32(indexPosition.X), Convert.ToInt32(indexPosition.Y)).B) * positionWeight.X * positionWeight.Y;
});
});
for (int i = 0; i < 3; i++)
{
rgb[i] = Convert.ToByte(Math.Max(0, Math.Min(255, source_pixels_weight_sum[i])));
}
System.Drawing.Color rgb_color = System.Drawing.Color.FromArgb(rgb[0], rgb[1], rgb[2]);
processed.SetPixel(x, y, rgb_color);
}
else
{
System.Drawing.Color rgb = System.Drawing.Color.FromArgb(0, 0, 0);
processed.SetPixel(x, y, rgb);
}
}
else
{
double[] source_pixels_weight_sum = { 0, 0, 0 };
byte[] rgb = { 0, 0, 0 };
Parallel.For(0, 4, y_index =>
{
Parallel.For(0, 4, x_index =>
{
Poseition dPosition = new Poseition(-interpolatePosition.X + Convert.ToInt32(interpolatePosition.X) + x_index - 1, -interpolatePosition.Y + Convert.ToInt32(interpolatePosition.Y) + y_index - 1);
Poseition positionWeight = new Poseition(BiCubicWeight(dPosition.X, this.InterpolationParameter.BicubicFactor), BiCubicWeight(dPosition.Y, this.InterpolationParameter.BicubicFactor));
Poseition indexPosition = new Poseition(Math.Max(0, Math.Min(this.ImageParameter.SourceImage.Width - 1, Convert.ToInt32(interpolatePosition.X) + x_index - 1)), Math.Max(0, Math.Min(this.ImageParameter.SourceImage.Height - 1, Convert.ToInt32(interpolatePosition.Y) + y_index - 1)));
source_pixels_weight_sum[0] += Convert.ToDouble(this.ImageParameter.SourceImage.GetPixel(Convert.ToInt32(indexPosition.X), Convert.ToInt32(indexPosition.Y)).R) * positionWeight.X * positionWeight.Y;
source_pixels_weight_sum[1] += Convert.ToDouble(this.ImageParameter.SourceImage.GetPixel(Convert.ToInt32(indexPosition.X), Convert.ToInt32(indexPosition.Y)).G) * positionWeight.X * positionWeight.Y;
source_pixels_weight_sum[2] += Convert.ToDouble(this.ImageParameter.SourceImage.GetPixel(Convert.ToInt32(indexPosition.X), Convert.ToInt32(indexPosition.Y)).B) * positionWeight.X * positionWeight.Y;
});
});
for (int i = 0; i < 3; i++)
{
rgb[i] = Convert.ToByte(Math.Max(0, Math.Min(255, source_pixels_weight_sum[i])));
}
System.Drawing.Color rgb_color = System.Drawing.Color.FromArgb(rgb[0], rgb[1], rgb[2]);
processed.SetPixel(x, y, rgb_color);
}
});
});
infoBox.Close();
Success successBox = new Success();
successBox.ShowDialog();
processed.UnlockBits();
return(processed);
}
// 双线性插值
private ImageIO BiIinearInterpolationCore()
{
ImageIO processed = new ImageIO(null, this.InterpolationParameter.TargetWidth, this.InterpolationParameter.TargetHeight);
processed.LockBits();
double widthFactor = Convert.ToDouble(this.ImageParameter.SourceImage.Width - 1) / Convert.ToDouble(this.InterpolationParameter.TargetWidth - 1);
double heightFactor = Convert.ToDouble(this.ImageParameter.SourceImage.Height - 1) / Convert.ToDouble(this.InterpolationParameter.TargetHeight - 1);
//并行计算
Info infoBox = new Info();
infoBox.Show();
Parallel.For(0, this.InterpolationParameter.TargetHeight, y =>
{
Parallel.For(0, this.InterpolationParameter.TargetWidth, x =>
{
Poseition transformPoseition = this.TransformFunction(Convert.ToDouble(x) * widthFactor, Convert.ToDouble(y) * heightFactor);
Poseition interpolatePosition = new Poseition(transformPoseition.X, transformPoseition.Y);
Poseition interpolatePositionFloor = new Poseition(Math.Floor(transformPoseition.X), Math.Floor(transformPoseition.Y));
Poseition interpolatePosition11 = new Poseition(Math.Max(0, Math.Min(this.InterpolationParameter.TargetWidth - 1, interpolatePositionFloor.X)), Math.Max(0, Math.Min(this.InterpolationParameter.TargetHeight - 1, interpolatePositionFloor.Y)));
Poseition interpolatePosition12 = new Poseition(Math.Max(0, Math.Min(this.InterpolationParameter.TargetWidth - 1, interpolatePositionFloor.X)), Math.Max(0, Math.Min(this.InterpolationParameter.TargetHeight - 1, interpolatePositionFloor.Y + 1)));
Poseition interpolatePosition21 = new Poseition(Math.Max(0, Math.Min(this.InterpolationParameter.TargetWidth - 1, interpolatePositionFloor.X + 1)), Math.Max(0, Math.Min(this.InterpolationParameter.TargetHeight - 1, interpolatePositionFloor.Y)));
Poseition interpolatePosition22 = new Poseition(Math.Max(0, Math.Min(this.InterpolationParameter.TargetWidth - 1, interpolatePositionFloor.X + 1)), Math.Max(0, Math.Min(this.InterpolationParameter.TargetHeight - 1, interpolatePositionFloor.Y + 1)));
if (transformPoseition.X <= 0 || transformPoseition.X >= (this.ImageParameter.SourceImage.Width - 1) || transformPoseition.Y <= 0 || transformPoseition.Y >= (this.ImageParameter.SourceImage.Height - 1))
{
if (this.Stretch)
{
Poseition newPoseition = new Poseition(Math.Max(0, Math.Min(this.ImageParameter.SourceImage.Width - 1, transformPoseition.X)), Math.Max(0, Math.Min(this.ImageParameter.SourceImage.Height - 1, transformPoseition.Y)));
System.Drawing.Color rgb = this.ImageParameter.SourceImage.GetPixel(Convert.ToInt32(newPoseition.X), Convert.ToInt32(newPoseition.Y));
processed.SetPixel(x, y, rgb);
}
else
{
System.Drawing.Color rgb = System.Drawing.Color.FromArgb(0, 0, 0);
processed.SetPixel(x, y, rgb);
}
}
else
{
double[] source_pixels_weight_sum = { 0, 0, 0 };
byte[] rgb = { 0, 0, 0 };
source_pixels_weight_sum[0] += Convert.ToDouble(this.ImageParameter.SourceImage.GetPixel(Convert.ToInt32(interpolatePosition11.X), Convert.ToInt32(interpolatePosition11.Y)).R) * (interpolatePosition22.X - interpolatePosition.X) * (interpolatePosition22.Y - interpolatePosition.Y);
source_pixels_weight_sum[0] += Convert.ToDouble(this.ImageParameter.SourceImage.GetPixel(Convert.ToInt32(interpolatePosition12.X), Convert.ToInt32(interpolatePosition12.Y)).R) * (interpolatePosition22.X - interpolatePosition.X) * (interpolatePosition.Y - interpolatePosition11.Y);
source_pixels_weight_sum[0] += Convert.ToDouble(this.ImageParameter.SourceImage.GetPixel(Convert.ToInt32(interpolatePosition21.X), Convert.ToInt32(interpolatePosition21.Y)).R) * (interpolatePosition.X - interpolatePosition11.X) * (interpolatePosition22.Y - interpolatePosition.Y);
source_pixels_weight_sum[0] += Convert.ToDouble(this.ImageParameter.SourceImage.GetPixel(Convert.ToInt32(interpolatePosition22.X), Convert.ToInt32(interpolatePosition22.Y)).R) * (interpolatePosition.X - interpolatePosition11.X) * (interpolatePosition.Y - interpolatePosition11.Y);
source_pixels_weight_sum[1] += Convert.ToDouble(this.ImageParameter.SourceImage.GetPixel(Convert.ToInt32(interpolatePosition11.X), Convert.ToInt32(interpolatePosition11.Y)).G) * (interpolatePosition22.X - interpolatePosition.X) * (interpolatePosition22.Y - interpolatePosition.Y);
source_pixels_weight_sum[1] += Convert.ToDouble(this.ImageParameter.SourceImage.GetPixel(Convert.ToInt32(interpolatePosition12.X), Convert.ToInt32(interpolatePosition12.Y)).G) * (interpolatePosition22.X - interpolatePosition.X) * (interpolatePosition.Y - interpolatePosition11.Y);
source_pixels_weight_sum[1] += Convert.ToDouble(this.ImageParameter.SourceImage.GetPixel(Convert.ToInt32(interpolatePosition21.X), Convert.ToInt32(interpolatePosition21.Y)).G) * (interpolatePosition.X - interpolatePosition11.X) * (interpolatePosition22.Y - interpolatePosition.Y);
source_pixels_weight_sum[1] += Convert.ToDouble(this.ImageParameter.SourceImage.GetPixel(Convert.ToInt32(interpolatePosition22.X), Convert.ToInt32(interpolatePosition22.Y)).G) * (interpolatePosition.X - interpolatePosition11.X) * (interpolatePosition.Y - interpolatePosition11.Y);
source_pixels_weight_sum[2] += Convert.ToDouble(this.ImageParameter.SourceImage.GetPixel(Convert.ToInt32(interpolatePosition11.X), Convert.ToInt32(interpolatePosition11.Y)).B) * (interpolatePosition22.X - interpolatePosition.X) * (interpolatePosition22.Y - interpolatePosition.Y);
source_pixels_weight_sum[2] += Convert.ToDouble(this.ImageParameter.SourceImage.GetPixel(Convert.ToInt32(interpolatePosition12.X), Convert.ToInt32(interpolatePosition12.Y)).B) * (interpolatePosition22.X - interpolatePosition.X) * (interpolatePosition.Y - interpolatePosition11.Y);
source_pixels_weight_sum[2] += Convert.ToDouble(this.ImageParameter.SourceImage.GetPixel(Convert.ToInt32(interpolatePosition21.X), Convert.ToInt32(interpolatePosition21.Y)).B) * (interpolatePosition.X - interpolatePosition11.X) * (interpolatePosition22.Y - interpolatePosition.Y);
source_pixels_weight_sum[2] += Convert.ToDouble(this.ImageParameter.SourceImage.GetPixel(Convert.ToInt32(interpolatePosition22.X), Convert.ToInt32(interpolatePosition22.Y)).B) * (interpolatePosition.X - interpolatePosition11.X) * (interpolatePosition.Y - interpolatePosition11.Y);
for (int i = 0; i < 3; i++)
{
rgb[i] = Convert.ToByte(Math.Max(0, Math.Min(255, source_pixels_weight_sum[i])));
}
System.Drawing.Color rgb_color = System.Drawing.Color.FromArgb(rgb[0], rgb[1], rgb[2]);
processed.SetPixel(x, y, rgb_color);
}
});
});
infoBox.Close();
Success successBox = new Success();
successBox.ShowDialog();
processed.UnlockBits();
return(processed);
}
