在图片框的图像上绘制线条，但不能穿过整个高度或宽度

Question

我在图片框上垂直和水平绘制线条，但线条没有完全混合，它们在高度和宽度上看起来更小。我在相机的帧内事件中绘制图像，然后在图像上显示线条，但它们没有完全混合。我的代码如下图片框的大小模式为缩放

    private void onFrameEvent(object sender, EventArgs e)
    {
        uEye.Camera Camera = sender as uEye.Camera;
        Int32 s32MemID;
        Bitmap bmp = null;
        Camera.Memory.GetActive(out s32MemID);
       // bmpbackup = null;
        Camera.Memory.CopyToBitmap(s32MemID, out bmp);
        try
        {
            bmp.RotateFlip(RotateFlipType.Rotate90FlipNone);
            DisplayWindow.Image = bmp;
        }
        catch (Exception)
        {

        }
        if (Const.cal == true)
        {
            g1.DrawLine(p, new Point(lastPoint4LeftClick.X, 0), new Point(lastPoint4LeftClick.X, DisplayWindow.Size.Height));
            g1.DrawLine(p, new Point(0, lastPoint4RightClick.Y), new Point(DisplayWindow.Size.Width, lastPoint4RightClick.Y));
            g1.DrawLine(p, new Point(last2ndPoint4LeftClick.X, 0), new Point(last2ndPoint4LeftClick.X,DisplayWindow.ClientSize.Height));
            g1.DrawLine(p, new Point(0, last2ndPoint4RightClick.Y), new Point(DisplayWindow.Size.Width, last2ndPoint4RightClick.Y));
            g1.DrawLine(p, new Point(0, 0), new Point(0, 1));
            Const.Xcalfactor = Math.Abs(lastPoint4LeftClick.X - last2ndPoint4LeftClick.X);
            Const.Ycalfactor = Math.Abs(lastPoint4RightClick.Y - last2ndPoint4RightClick.Y);
        }

        GC.Collect();
    }

Answer 1

CopyToBitmap中存在一个错误：它在手册中说，它在内存中返回图像的副本，但实际上它给出了图像的参考。在您的情况下，这意味着当您绘制线条时，缓冲区中正在绘制一个新图像，并覆盖图像的一部分。如果高FPS速率对您来说并不重要，请将位图复制到新实例，然后在单独的线程中绘制和渲染它。我使用15 FPS的显示效果很好。