Question

    public void accessHi3DRange(buffer)
    {
        double meanR = 0;
        uint sumR = 0;
        uint countR = 0;
        int numberOfScansR = buffer.Height;
        bitmapHeight = numberOfScansR;

        int subCompWidth = buffer.Components["Hi3D 1"].SubComponents["Range"].Format.Width;
        bitmapWidth = subCompWidth;
        ushort[,] data = buffer.Components["Hi3D 1"].SubComponents["Range"].GetRows<ushort>(0, numberOfScansR);

        for (int scan = 0; scan < numberOfScansR; scan++)
        {

            for (int col = 0; col < subCompWidth; col++)
            {
                ushort val = data[scan, col];
                if (val != 0)
                {
                    sumR += val;
                    drawPix(col, scan, (int)val, (int)val, (int)val);
                    countR++;
                }
            }
        }
    }

    private void drawPix(int x, int y, int r, int g, int b)
    {
        ((Bitmap)pictureBox1.Image).SetPixel(x, y, Color.FromArgb(r, g, b));
        return;
    }

当我运行代码时，我得到了

System.ArgumentException：＆＃39;＆＃39; 655＆＃39;的值不适用于红色＆＃39;。＆＃39;红色＆＃39;应大于或等于0且小于或等于255。＆＃39;

因此，要解决此错误，我想将ushort值转换为byte，以便可以在图片框中显示。如果是这样，我该如何转换？

Answer 1

我认为问题在于：

drawPix(col, scan, (int)val, (int)val, (int)val);

因为您将这些较大的int传递到Color.FromArgb(r, g, b)函数中。 MSDN在此https://msdn.microsoft.com/en-us/library/cce5h557(v=vs.110).aspx表示R，G和B的值必须为0到255.

我认为你想要的是这个重载：https://msdn.microsoft.com/en-us/library/2zys7833(v=vs.110).aspx取满int然后将它从那里分成a，r，g和b。

这需要对您的代码进行以下编辑：

 public void accessHi3DRange(buffer)
    {
        double meanR = 0;
        uint sumR = 0;
        uint countR = 0;
        int numberOfScansR = buffer.Height;
        bitmapHeight = numberOfScansR;

        int subCompWidth = buffer.Components["Hi3D 1"].SubComponents["Range"].Format.Width;
        bitmapWidth = subCompWidth;
        ushort[,] data = buffer.Components["Hi3D 1"].SubComponents["Range"].GetRows<ushort>(0, numberOfScansR);

        for (int scan = 0; scan < numberOfScansR; scan++)
        {

            for (int col = 0; col < subCompWidth; col++)
            {
                ushort val = data[scan, col];
                if (val != 0)
                {
                    sumR += val;
                    drawPix(col, scan, (int)val);
                    countR++;
                }
            }
        }
    }

    private void drawPix(int x, int y, int rgb)
    {
        ((Bitmap)pictureBox1.Image).SetPixel(x, y, Color.FromArgb(rgb));
        return;
    }

c＃如何将ushort值转换为byte，以便我可以在picturebox中显示它们

1 个答案: