private void SpawnEyeProcessorTask()
{
Task.Run(() =>
{
MonochromeImageData lastMonochromeImage = null;
while (m_running)
{
byte[] data = null;
lock (m_eyeDataLock)
{
data = m_eyeDataQueue.Count > 0 ? m_eyeDataQueue.Dequeue() : null;
}
if (data != null)
{
var width = BitConverter.ToInt32(data, 0);
var height = BitConverter.ToInt32(data, 4);
var channels = BitConverter.ToInt32(data, 8);
if (width > 0 && height > 0 && channels > 0)
{
var pixels = new byte[width * height * channels];
Buffer.BlockCopy(data, 12, pixels, 0, pixels.Length);
if (channels == 1)
{
int treshold = 0;
lock (m_lock)
{
treshold = m_settingsModel.Treshold;
}
var currMonochromeImage = new MonochromeImageData();
currMonochromeImage.Width = width;
currMonochromeImage.Height = height;
currMonochromeImage.Pixels = pixels;
if (lastMonochromeImage != null)
{
var factor = CompareInfraredImages(currMonochromeImage, lastMonochromeImage, treshold);
if (factor < 1.0 && m_alarmIsArmed && !m_alarmIsPlaying)
PushCommand(new Commands.ControlAlarm(this, true));
}
lastMonochromeImage = currMonochromeImage;
}
}
}
else
Thread.Sleep(50);
}
lock (m_lock)
{
lock (m_eyeDataLock)
{
m_eyeDataQueue = null;
}
}
});
}
static double CompareInfraredImages(MonochromeImageData a, MonochromeImageData b, int treshold = 0)
{
if (a == null || b == null || a.Pixels == null || b.Pixels == null)
return 0.0;
if (a == b)
return 1.0;
if (a.Width != b.Width || a.Height != b.Height || a.Pixels.Length != b.Pixels.Length)
return 0.0;
var passed = 0;
for (int i = 0, c = a.Pixels.Length; i < c; ++i)
if (Math.Abs((int)a.Pixels[i] - (int)b.Pixels[i]) <= treshold)
++passed;
return (double)passed / (double)a.Pixels.Length;
}