我有以下代码在2D插值颜色图中显示我的传感器数据。但是,我想将其转换为3D网格表面。我只能找到一些复杂的方法来做到这一点。但我想的是一种更简单的方法,可以根据每个数据阵列上的不同颜色将2D色彩图拉到更高的水平,从而使2D位图像3D一样
Bitmap bmp3 = new Bitmap(PicBoxChi.Width, PicBoxChi.Height);
using (Graphics g = Graphics.FromImage(bmp3))
{
// this loop create a 6X4 map to show my sensor data
for (int a = 0; a < 6; a++)
{
for (int b = 0; b < 4; b++)
{
pts[a, b] = new PointC(new PointF(x0 + b*width, y0 + a*height), data[a*4+b+48] );
}
}
int colorLength = cmap.GetLength(0);
// Bilinear interpolation:
// this loop transfer my 6x4 sensor data map to a color map
for (int i = 0; i < 5; i++)
{
for (int j = 0; j < 3; j++)
{
PointF[] pta = new PointF[4]{pts[i,j].pointf, pts[i+1,j].pointf,
pts[i+1,j+1].pointf, pts[i,j+1].pointf};
float[] cdata = new float[4]{pts[i,j].C,pts[i+1,j].C,
pts[i+1,j+1].C,pts[i,j+1].C};
Interp(g, pta, cdata, 50);
}
}
}
我现在可以通过上面的代码创建2D颜色位图。但我不知道如图所示制作3D。
答案 0 :(得分:0)
如果像素颜色是RGB格式,从提供的图片我可以推断出你感兴趣的是颜色的纯色调。
要从RGB获得标准[0,360]范围的色调值,您可以执行this:
System.Drawing.Color color = System.Drawing.Color.FromArgb(red, green, blue);
float hue = color.GetHue();
或更可定制的方法(here in Java,也在此处报告):
public int getHue(int red, int green, int blue) {
float min = Math.min(Math.min(red, green), blue);
float max = Math.max(Math.max(red, green), blue);
float hue = 0f;
if (max == red) {
hue = (green - blue) / (max - min);
} else if (max == green) {
hue = 2f + (blue - red) / (max - min);
} else {
hue = 4f + (red - green) / (max - min);
}
hue = hue * 60;
if (hue < 0) hue = hue + 360;
return Math.round(hue);
}
然后,您可以简单地将结果值用作相应顶点的高度,可以选择通过将其除以/乘以某个常数来微调它。
生成3D网格相对简单,我认为你已经有了代码,无论如何都是伪代码:
float getHeight(img img, int x, int y) {
float scalefactor = 1.0/360; //any value you like
return getHue(getRgbColorFromImage(img, x, y)) * scalefactor;
}
int x=0, y=0;
for (y=0; y<imageHeight-1; y++) {
for (x=0; x<imageWidth-1; x++) {
new quad = [x, y, getHeight(img, x, y),
x+1, y, getHeight(img, x+1, y),
x, y+1, getHeight(img, x, y+1),
x+1, y+1, getHeight(img, x+1, y+1)];
}
}
如果你想要三角形:
new triangle = [x, y, getHeight(img, x, y),
x+1, y, getHeight(img, x+1, y),
x, y+1, getHeight(img, x, y+1)];
new triangle = [x+1, y, getHeight(img, x+1, y),
x, y+1, getHeight(img, x, y+1),
x+1, y+1, getHeight(img, x+1, y+1)];