public double GetAverageBrightness()
{
if (_brightness < 0)
{
var bitmapData = BitmapData;
var buffer = Buffer;
double brightness = 0;
for (int row = 0; row < bitmapData.Height; row++)
{
int byteIndex = row * bitmapData.Stride;
for (int col = 0; col < bitmapData.Width; col++)
{
int pixelIndex = byteIndex + col * 3;
brightness += ColorModel.GetBrightness(buffer[pixelIndex + 2], buffer[pixelIndex + 1], buffer[pixelIndex]);
}
}
_brightness = brightness / (bitmapData.Width * bitmapData.Height);
}
return(_brightness);
}
public DetectorResult Process(Frame frame, int threshold)
{
DetectorResult detectorResult = new DetectorResult();
if (_processNumber == _buffers.Length /* || _background == null && _processNumber == StartBackgroundProcessing*/)
{
//if (_processNumber == StartBackgroundProcessing)
//{
// _buffers[_processNumber] = frame.Buffer;
//}
var background = frame.Copy();
new Thread(data =>
{
int processNumber = (int)data;
BitmapData bitmapData = background.BitmapData;
byte[] buffer = background.Buffer;
for (int row = 0; row < bitmapData.Height; row++)
{
int byteIndex = row * bitmapData.Stride;
for (int col = 0; col < bitmapData.Width; col++)
{
int pixelIndex = byteIndex + col * 3;
double sumR = 0, sumG = 0, sumB = 0;
for (int index = 0; index < processNumber; index++)
{
sumR += _buffers[index][pixelIndex + 2];
sumG += _buffers[index][pixelIndex + 1];
sumB += _buffers[index][pixelIndex];
}
buffer[pixelIndex + 2] = GetAv(sumR, processNumber);
buffer[pixelIndex + 1] = GetAv(sumG, processNumber);
buffer[pixelIndex] = GetAv(sumB, processNumber);
}
}
background.SaveChanges();
_background = background.Buffer;
background.Image.Save("./" + background.GetHashCode() + ".jpg", ImageFormat.Jpeg);
}).Start(_processNumber);
if (_processNumber == _buffers.Length)
{
_processNumber = 0;
}
else
{
_processNumber++;
}
}
else if (_processNumber < _buffers.Length)
{
_buffers[_processNumber] = frame.Buffer;
_processNumber++;
}
if (_background != null)
{
BitmapData bitmapData = frame.BitmapData;
byte[] buffer = frame.Buffer;
for (int row = 0; row < bitmapData.Height; row++)
{
int byteIndex = row * bitmapData.Stride;
for (int col = 0; col < bitmapData.Width; col++)
{
int pixelIndex = byteIndex + col * 3;
if (Math.Abs(
ColorModel.GetBrightness(buffer[pixelIndex + 2], buffer[pixelIndex + 1], buffer[pixelIndex])
-
ColorModel.GetBrightness(_background[pixelIndex + 2], _background[pixelIndex + 1], _background[pixelIndex])) > threshold)
{
detectorResult.Add(col, row);
}
}
}
}
return(detectorResult);
}
