/// <summary>
/// 计算图像直方图
/// </summary>
/// <param name="ChartWidth">图的宽度</param>
/// <param name="ChartHeight">图的高度</param>
private void GetHistogram(int ChartWidth, int ChartHeight)
{
int[] red = new int[256];
int[] green = new int[256];
int[] blue = new int[256];
double WidthOffset = (double)ChartWidth / 256;
string reds = "M 0," + ChartHeight + " ";
string greens = "M 0," + ChartHeight + " ";
string blues = "M 0," + ChartHeight + " ";
core.PicProcess picProcess = new core.PicProcess();
int max = picProcess.GetPixelCount(pic, red, green, blue);
for (int i = 0; i < 256; i++)
{
int y = ChartHeight - ChartHeight * red[i] / max;
reds += (i * WidthOffset).ToString() + "," + y.ToString() + " ";
y = ChartHeight - ChartHeight * green[i] / max;
greens += (i * WidthOffset).ToString() + "," + y.ToString() + " ";
y = ChartHeight - ChartHeight * blue[i] / max;
blues += (i * WidthOffset).ToString() + "," + y.ToString() + " ";
}
reds += ChartWidth + "," + ChartHeight + " Z";
greens += ChartWidth + "," + ChartHeight + " Z";
blues += ChartWidth + "," + ChartHeight + " Z";
var converter = TypeDescriptor.GetConverter(typeof(System.Windows.Media.Geometry));
RedPath = (System.Windows.Media.Geometry)converter.ConvertFrom(reds);
GreenPath = (System.Windows.Media.Geometry)converter.ConvertFrom(greens);
BluePath = (System.Windows.Media.Geometry)converter.ConvertFrom(blues);
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("RedPath"));
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("GreenPath"));
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("BluePath"));
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
ChartPath.Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.ApplicationIdle, (Action)(() =>
{
core.PicProcess picProcess = new core.PicProcess();
picProcess.GetPixelCount(bs, data[1], data[2], data[3]);
for (int i = 0; i < 256; i++)
{
data[0][i] = data[1][i] + data[2][i] + data[3][i];
max[0] = data[0][i] > max[0] ? data[0][i] : max[0];
max[1] = data[1][i] > max[1] ? data[1][i] : max[1];
max[2] = data[2][i] > max[2] ? data[2][i] : max[2];
max[3] = data[3][i] > max[3] ? data[3][i] : max[3];
}
Channel.SelectedIndex = 0;
}));
}