本文整理汇总了C#中Color.ThrowIfNull方法的典型用法代码示例。如果您正苦于以下问题：C# Color.ThrowIfNull方法的具体用法？C# Color.ThrowIfNull怎么用？C# Color.ThrowIfNull使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Color的用法示例。
在下文中一共展示了Color.ThrowIfNull方法的5个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: EdgeDetection
public static Bitmap EdgeDetection(this Bitmap OriginalImage, float Threshold, Color EdgeColor, string FileName = "")
{
OriginalImage.ThrowIfNull("OriginalImage");
EdgeColor.ThrowIfNull("EdgeColor");
ImageFormat FormatUsing = FileName.GetImageFormat();
Bitmap NewBitmap = new Bitmap(OriginalImage, OriginalImage.Width, OriginalImage.Height);
BitmapData NewData = NewBitmap.LockImage();
BitmapData OldData = OriginalImage.LockImage();
int NewPixelSize = NewData.GetPixelSize();
int OldPixelSize = OldData.GetPixelSize();
int Width = NewBitmap.Width;
int Height = NewBitmap.Height;
Parallel.For(0, Width, x =>
{
for (int y = 0; y < Height; ++y)
{
Color CurrentColor = OldData.GetPixel(x, y, OldPixelSize);
if (y < Height - 1 && x < Width - 1)
{
Color TempColor = OldData.GetPixel(x + 1, y + 1, OldPixelSize);
if (Distance(CurrentColor.R, TempColor.R, CurrentColor.G, TempColor.G, CurrentColor.B, TempColor.B) > Threshold)
NewData.SetPixel(x, y, EdgeColor, NewPixelSize);
}
else if (y < Height - 1)
{
Color TempColor = OldData.GetPixel(x, y + 1, OldPixelSize);
if (Distance(CurrentColor.R, TempColor.R, CurrentColor.G, TempColor.G, CurrentColor.B, TempColor.B) > Threshold)
NewData.SetPixel(x, y, EdgeColor, NewPixelSize);
}
else if (x < Width - 1)
{
Color TempColor = OldData.GetPixel(x + 1, y, OldPixelSize);
if (Distance(CurrentColor.R, TempColor.R, CurrentColor.G, TempColor.G, CurrentColor.B, TempColor.B) > Threshold)
NewData.SetPixel(x, y, EdgeColor, NewPixelSize);
}
}
});
NewBitmap.UnlockImage(NewData);
OriginalImage.UnlockImage(OldData);
if (!string.IsNullOrEmpty(FileName))
NewBitmap.Save(FileName, FormatUsing);
return NewBitmap;
}示例2: DrawRoundedRectangle
public static Bitmap DrawRoundedRectangle(this Bitmap Image, Color BoxColor, int XPosition, int YPosition,
int Height, int Width, int CornerRadius, string FileName = "")
{
Image.ThrowIfNull("Image");
BoxColor.ThrowIfNull("BoxColor");
ImageFormat FormatUsing = FileName.GetImageFormat();
Bitmap NewBitmap = new Bitmap(Image, Image.Width, Image.Height);
using (Graphics NewGraphics = Graphics.FromImage(NewBitmap))
{
using (Pen BoxPen = new Pen(BoxColor))
{
using (GraphicsPath Path = new GraphicsPath())
{
Path.AddLine(XPosition + CornerRadius, YPosition, XPosition + Width - (CornerRadius * 2), YPosition);
Path.AddArc(XPosition + Width - (CornerRadius * 2), YPosition, CornerRadius * 2, CornerRadius * 2, 270, 90);
Path.AddLine(XPosition + Width, YPosition + CornerRadius, XPosition + Width, YPosition + Height - (CornerRadius * 2));
Path.AddArc(XPosition + Width - (CornerRadius * 2), YPosition + Height - (CornerRadius * 2), CornerRadius * 2, CornerRadius * 2, 0, 90);
Path.AddLine(XPosition + Width - (CornerRadius * 2), YPosition + Height, XPosition + CornerRadius, YPosition + Height);
Path.AddArc(XPosition, YPosition + Height - (CornerRadius * 2), CornerRadius * 2, CornerRadius * 2, 90, 90);
Path.AddLine(XPosition, YPosition + Height - (CornerRadius * 2), XPosition, YPosition + CornerRadius);
Path.AddArc(XPosition, YPosition, CornerRadius * 2, CornerRadius * 2, 180, 90);
Path.CloseFigure();
NewGraphics.DrawPath(BoxPen, Path);
}
}
}
if (!string.IsNullOrEmpty(FileName))
NewBitmap.Save(FileName, FormatUsing);
return NewBitmap;
}示例3: SetPixel
/// <summary>
/// Sets a pixel at the x,y coords
/// </summary>
/// <param name="Data">Bitmap data</param>
/// <param name="x">X coord</param>
/// <param name="y">Y coord</param>
/// <param name="PixelColor">Pixel color information</param>
/// <param name="PixelSizeInBytes">Pixel size in bytes</param>
public static unsafe void SetPixel(this BitmapData Data, int x, int y, Color PixelColor, int PixelSizeInBytes)
{
Data.ThrowIfNull("Data");
PixelColor.ThrowIfNull("PixelColor");
byte* DataPointer = (byte*)Data.Scan0;
DataPointer = DataPointer + (y * Data.Stride) + (x * PixelSizeInBytes);
if (PixelSizeInBytes == 3)
{
DataPointer[2] = PixelColor.R;
DataPointer[1] = PixelColor.G;
DataPointer[0] = PixelColor.B;
return;
}
DataPointer[3] = PixelColor.A;
DataPointer[2] = PixelColor.R;
DataPointer[1] = PixelColor.G;
DataPointer[0] = PixelColor.B;
}示例4: GetHeight
private static float GetHeight(Color Color)
{
Color.ThrowIfNull("Color");
return (float)Color.R / 255.0f;
}示例5: MotionDetection
/// <summary>
/// Runs a simplistic motion detection algorithm
/// </summary>
/// <param name="NewImage">The "new" frame</param>
/// <param name="OldImage">The "old" frame</param>
/// <param name="Threshold">The threshold used to detect changes in the image</param>
/// <param name="DetectionColor">Color to display changes in the images as</param>
/// <returns>A bitmap indicating where changes between frames have occurred overlayed on top of the new image.</returns>
public static Bitmap MotionDetection(this Bitmap NewImage, Bitmap OldImage, int Threshold, Color DetectionColor)
{
NewImage.ThrowIfNull("NewImage");
OldImage.ThrowIfNull("OldImage");
DetectionColor.ThrowIfNull("DetectionColor");
using (Bitmap NewImage1 = NewImage.BlackAndWhite())
{
using (Bitmap OldImage1 = OldImage.BlackAndWhite())
{
using (Bitmap NewImage2 = NewImage1.SNNBlur(5))
{
using (Bitmap OldImage2 = OldImage1.SNNBlur(5))
{
using (Bitmap OutputImage = new Bitmap(NewImage2, NewImage2.Width, NewImage2.Height))
{
using (Bitmap Overlay = new Bitmap(NewImage, NewImage.Width, NewImage.Height))
{
BitmapData NewImage2Data = NewImage2.LockImage();
int NewImage2PixelSize = NewImage2Data.GetPixelSize();
BitmapData OldImage2Data = OldImage2.LockImage();
int OldImage2PixelSize = OldImage2Data.GetPixelSize();
BitmapData OverlayData = Overlay.LockImage();
int OverlayPixelSize = OverlayData.GetPixelSize();
int Width = OutputImage.Width;
int Height = OutputImage.Height;
Parallel.For(0, Width, x =>
{
for (int y = 0; y < Height; ++y)
{
Color NewPixel = NewImage2Data.GetPixel(x, y, NewImage2PixelSize);
Color OldPixel = OldImage2Data.GetPixel(x, y, OldImage2PixelSize);
if (System.Math.Pow((double)(NewPixel.R - OldPixel.R), 2.0) > Threshold)
{
OverlayData.SetPixel(x, y, Color.FromArgb(100, 0, 100), OverlayPixelSize);
}
else
{
OverlayData.SetPixel(x, y, Color.FromArgb(200, 0, 200), OverlayPixelSize);
}
}
});
Overlay.UnlockImage(OverlayData);
NewImage2.UnlockImage(NewImage2Data);
OldImage2.UnlockImage(OldImage2Data);
using (Bitmap Overlay2 = Overlay.EdgeDetection(25, DetectionColor))
{
BitmapData Overlay2Data = Overlay2.LockImage();
int Overlay2PixelSize = Overlay2Data.GetPixelSize();
Width = OutputImage.Width;
Height = OutputImage.Height;
Parallel.For(0, Width, x =>
{
for (int y = 0; y < Height; ++y)
{
Color Pixel1 = Overlay2Data.GetPixel(x, y, Overlay2PixelSize);
if (Pixel1.R != DetectionColor.R || Pixel1.G != DetectionColor.G || Pixel1.B != DetectionColor.B)
{
Overlay2Data.SetPixel(x, y, Color.FromArgb(200, 0, 200), Overlay2PixelSize);
}
}
});
Overlay2.UnlockImage(Overlay2Data);
return OutputImage.Watermark(Overlay2, 1.0f, 0, 0, Color.FromArgb(200, 0, 200));
}
}
}
}
}
}
}
}