我有抗锯齿平滑模式和绘图的问题。假设我有一个在同一点具有最小值和最大值的信号。所以我想显示它以查看它“更厚”的位置。
所以我使用的方法是绘制垂直线并使用抗锯齿。这是问题所在,上升沿似乎是抗锯齿的,但下降沿没有。如果我在第二个信号中添加了一些噪音,则可以观察到同样的事情。
无噪音
有噪音
![有噪音][2]
谁能指出我错过了什么?或者这个问题来自其他地方?
代码(从评论中移出):
Bitmap drawBitmap = new Bitmap(pictureBox1.Height, _
pictureBox1.Width, _
System.Drawing.Imaging.PixelFormat.Format32bppArgb);
Graphics drawGraph;
Point[] pts = new Point[] { new Point(0, 60), new Point(0, 59), new Point(1, 35), _
new Point(1, 47), new Point(2, 25), new Point(2, 35), _
new Point(3, 17), new Point(3, 25), new Point(4, 12), _
new Point(4, 27), new Point(5, 10), new Point(5, 22), _
new Point(6, 10), new Point(6, 11), new Point(7, 11), _
new Point(7, 16), new Point(8, 16), new Point(8, 24), _
new Point(9, 24), new Point(9, 34), new Point(10, 34), _
new Point(10, 46), new Point(11, 46), new Point(11, 59), _
new Point(12, 59), new Point(12, 72)};
using (drawGraph = Graphics.FromImage(drawBitmap)) {
drawGraph.InterpolationMode = Drawing2D.InterpolationMode.HighQualityBicubic;
drawGraph.SmoothingMode = Drawing2D.SmoothingMode.AntiAlias;
for (int i = 1; i < pts.Length - 1; i += 2) {
drawGraph.DrawLine(new Pen(Color.Black, 1), pts[i], pts[i - 1]);
drawGraph.DrawLine(new Pen(Color.Black, 1), pts[i], pts[i + 1]);
}
}
pictureBox1.Image = drawBitmap;