public string Process(Bitmap bitmap)
{
// When video device initializes it adapts to
// background for some frames.
if (_skipStartingFrames > 0)
{
_skipStartingFrames--;
return(null);
}
using (var grayScaleImage = GrayScaleImageHelper.ToGrayScale(bitmap))
{
if (_previous == null)
{
byte[,] imageTMinus1MeanWH;
byte[,] imageTMinus1VarianceWH;
GrayScaleImageHelper.CalculateMeanAndVarianceM9(
grayScaleImage,
out imageTMinus1MeanWH,
out imageTMinus1VarianceWH);
_previous = new RadiometricSimilarityImage(
grayScaleImage,
imageTMinus1MeanWH,
imageTMinus1VarianceWH
);
_grayScaleBackground = (Bitmap)grayScaleImage.Clone();
return(null);
}
var bounds = new Rectangle(0, 0, grayScaleImage.Width, grayScaleImage.Height);
BitmapData bitmapData = grayScaleImage.LockBits(bounds, ImageLockMode.ReadOnly, grayScaleImage.PixelFormat);
var grayScaleHW = new byte[grayScaleImage.Height * bitmapData.Stride];
Marshal.Copy(bitmapData.Scan0, grayScaleHW, 0, grayScaleImage.Height * bitmapData.Stride);
grayScaleImage.UnlockBits(bitmapData);
byte[,] imageTMean;
byte[,] imageTVariance;
byte[,] motionWH;
bool motionPresents;
GrayScaleImageHelper.CalculateMeanAndVarianceM9(
grayScaleImage.Width,
grayScaleImage.Height,
bitmapData.Stride,
grayScaleHW,
out imageTMean,
out imageTVariance);
var current = new RadiometricSimilarityImage(grayScaleImage.Width,
grayScaleImage.Height,
bitmapData.Stride,
grayScaleHW,
imageTMean, imageTVariance);
byte[,] motionData, stationaryData;
Bitmap motionImage, stationaryImage;
GrayScaleImageHelper.GetRadiometricSimmilarity(
_previous,
current,
RadiometricDifferenceThrethhold,
out motionData,
out motionImage,
out stationaryData,
out stationaryImage);
{
using (motionImage)
{
_interceptor.Intercept(RadiometricSimmilarityFrameTFrameTMinus1Motion, ImageHelper.ToBytes(motionImage));
}
using (stationaryImage)
{
_interceptor.Intercept(RadiometricSimmilarityFrameTFrameTMinus1Stationary, ImageHelper.ToBytes(stationaryImage));
}
UpdateBackgroundOrForeground(
motionData,
grayScaleImage.Width,
grayScaleImage.Height,
bitmapData.Stride,
grayScaleHW,
out motionPresents,
out motionWH);
}
_previous = current;
using (var image = GrayScaleImageHelper.FromWH(motionWH))
{
_interceptor.Intercept(DifferenceImage, ImageHelper.ToBytes(image));
}
if (motionPresents)
{
return("Movement detected!");
}
}
return(null);
}
public string Process(Bitmap bitmap)
{
// When video device initializes it adapts to
// background for some frames.
if (_skipStartingFrames > 0)
{
_skipStartingFrames--;
return(null);
}
using (var grayScaleImage = GrayScaleImageHelper.ToGrayScale(bitmap))
{
if (_grayScaleFrameTMinus1 == null ||
_grayScaleBackground == null)
{
_grayScaleFrameTMinus1 = (Bitmap)grayScaleImage.Clone();
GrayScaleImageHelper.CalculateMeanAndVarianceM9(
_grayScaleFrameTMinus1,
out _imageTMinus1MeanWH,
out _imageTMinus1VarianceWH);
_grayScaleBackground = (Bitmap)grayScaleImage.Clone();
return(null);
}
var bounds = new Rectangle(0, 0, grayScaleImage.Width, grayScaleImage.Height);
BitmapData bitmapData = grayScaleImage.LockBits(bounds, ImageLockMode.ReadOnly, grayScaleImage.PixelFormat);
var grayScaleHW = new byte[grayScaleImage.Height * bitmapData.Stride];
Marshal.Copy(bitmapData.Scan0, grayScaleHW, 0, grayScaleImage.Height * bitmapData.Stride);
byte[,] imageTMean;
byte[,] imageTVariance;
byte[,] temporalImageAnalysisResultHW;
byte[,] motionWH;
bool motionPresents;
using (var temporalImageAnalysisResult = GetRadiometricSimmilarity(
grayScaleImage.Width,
grayScaleImage.Height,
bitmapData.Stride,
grayScaleHW,
out temporalImageAnalysisResultHW,
out imageTMean,
out imageTVariance))
{
_interceptor.Intercept(RadiometricSimmilarity, temporalImageAnalysisResult);
UpdateBackgroundOrForeground(
temporalImageAnalysisResultHW,
grayScaleImage.Width,
grayScaleImage.Height,
bitmapData.Stride,
grayScaleHW,
out motionPresents,
out motionWH);
}
_imageTMinus1MeanWH = imageTMean;
_imageTMinus1VarianceWH = imageTVariance;
_grayScaleFrameTMinus1 = (Bitmap)grayScaleImage.Clone();
grayScaleImage.UnlockBits(bitmapData);
_interceptor.Intercept(DifferenceImage, GrayScaleImageHelper.FromWH(motionWH));
if (motionPresents)
{
return("Movement detected!");
}
}
return(null);
}
