/// <summary>
/// 指定1画素のGamutを返す
/// </summary>
/// <param name="bitmap">対象画像</param>
/// <param name="pointRate">対象画素(割合)</param>
/// <returns>画素値(BGR)</returns>
public static Gamut ReadPixel(this BitmapSource bitmap, Point pointRate)
{
int rectX = (int)Math.Round(pointRate.X * bitmap.PixelWidth);
int rectY = (int)Math.Round(pointRate.Y * bitmap.PixelHeight);
return(bitmap.GetPixelAverage(new Int32Rect(rectX, rectY, 1, 1)));
}
/// <summary>
/// 指定矩形のGamutを返す
/// </summary>
/// <param name="bitmap">対象画像</param>
/// <param name="rectRate">対象領域(割合)</param>
/// <returns>画素値(BGR)</returns>
public static Gamut ReadPixelsAverage(this BitmapSource bitmap, Rect rectRate)
{
int rectX = (int)Math.Round(rectRate.X * bitmap.PixelWidth);
int rectY = (int)Math.Round(rectRate.Y * bitmap.PixelHeight);
int rectWidth = (int)Math.Round(rectRate.Width * bitmap.PixelWidth);
int rectHeight = (int)Math.Round(rectRate.Height * bitmap.PixelHeight);
return(bitmap.GetPixelAverage(new Int32Rect(rectX, rectY, rectWidth, rectHeight)));
}
