private static List <PointCluster> FindClusters(LazerSpot spotParams,
byte[] rgbValues, int w, int h, int stride)
{
var clusters = new List <ScanCluster>();
List <ScanLine> curLines = null;
for (var y = 0; y < h; y++)
{
ScanLine curLine = null;
curLines = new List <ScanLine>();
for (var x = 0; x < w; x++)
{
var ind = x * 3 + y * stride;
var red = rgbValues[ind];
var green = rgbValues[ind + 1];
var blue = rgbValues[ind + 2];
var delta = (red - spotParams.patRed) * (red - spotParams.patRed) + (green - spotParams.patGreen) * (green - spotParams.patGreen) +
(blue - spotParams.patBlue) * (blue - spotParams.patBlue);
var isIn = delta < spotParams.squareDev;
if (isIn)
{
if (curLine == null)
{
curLine = new ScanLine {
y = y, scans = new List <Point> {
new Point(x, x)
}
}
}
;
else
{
curLine.scans[0] = new Point(curLine.scans[0].X, x);
}
}
else
if (curLine != null)
{
curLines.Add(curLine);
curLine = null;
}
}
if (curLine != null)
{
curLines.Add(curLine);
}
if (curLines.Count == 0)
{
continue;
}
MergeClusters(curLines, clusters);
}
if (curLines != null && curLines.Count > 0)
{
MergeClusters(curLines, clusters);
}
return(clusters.Select(c => c.ToPointCluster()).ToList());
}
public static List <PointCluster> FindClusters(Bitmap bmp,
LazerSpot spotParams)
{
var rect = new Rectangle(0, 0, bmp.Width, bmp.Height);
var bmpData =
bmp.LockBits(rect, ImageLockMode.ReadWrite,
bmp.PixelFormat);
try
{
IntPtr ptr = bmpData.Scan0;
int bytes = Math.Abs(bmpData.Stride) * bmp.Height;
var rgbValues = new byte[bytes];
System.Runtime.InteropServices.Marshal.Copy(ptr, rgbValues, 0, bytes);
return(FindClusters(spotParams, rgbValues,
bmp.Width, bmp.Height, bmpData.Stride));
}
finally
{
bmp.UnlockBits(bmpData);
}
}
