/// <summary>
/// Выделение текста на единичном кадре видеопотока
/// </summary>
/// <param name="videoFrame">Кадр видео</param>
/// <returns>true</returns>
public Task<bool> DetectText(GreyVideoFrame videoFrame, int threadsNumber)
{
try
{
if (videoFrame == null || videoFrame.Frame == null)
throw new ArgumentNullException("Null frame in DetectText");
return Task.Run(() =>
{
if (videoFrame.NeedProcess)
{
EdgeDetectionFilter sobel = new SobelFilter();
GradientFilter gradientFiler = new SimpleGradientFilter();
SmoothingFilter gauss = null; //new GaussFilter(this.GaussFilterSize, this.GaussFilterSigma);
SmoothingFilter gaussForCanny = null;
SWTTextDetection sWTTextDetection = null;
if (ParametersUndefined(videoFrame))
{
if (this.UseAdaptiveSmoothing)
gaussForCanny = new AdaptiveGaussFilter(this.GaussFilterSigma);
else
gaussForCanny = new GaussFilter(this.GaussFilterSize, this.GaussFilterSigma);
gauss = new GaussFilter(this.GaussFilterSize, this.GaussFilterSigma);
CannyEdgeDetection canny = new CannyEdgeDetection(gaussForCanny, sobel, this.CannyLowTreshold, this.CannyHighTreshold);
sWTTextDetection = new SWTTextDetection(canny, gauss, gradientFiler, this.VarienceAverageSWRation,
this.AspectRatio, this.DiamiterSWRatio, this.BbPixelsNumberMinRatio, this.BbPixelsNumberMaxRatio, this.ImageRegionHeightRationMin,
this.ImageRegionWidthRatioMin, this.PairsHeightRatio, this.PairsIntensityRatio, this.PairsSWRatio,
this.PairsWidthDistanceSqrRatio, this.PairsOccupationRatio, this.MinLettersNumberInTextRegion, this.MergeByDirectionAndChainEnds);
}
else
{
if (videoFrame.UseAdaptiveSmoothing)
gaussForCanny = new AdaptiveGaussFilter(videoFrame.GaussFilterSigma);
else
gaussForCanny = new GaussFilter(videoFrame.GaussFilterSize, videoFrame.GaussFilterSigma);
gauss = new GaussFilter(videoFrame.GaussFilterSize, videoFrame.GaussFilterSigma);
CannyEdgeDetection canny = new CannyEdgeDetection(gaussForCanny, sobel, videoFrame.CannyLowTreshold, videoFrame.CannyHighTreshold);
sWTTextDetection = new SWTTextDetection(canny, gauss, gradientFiler, videoFrame.VarienceAverageSWRation, videoFrame.AspectRatio,
videoFrame.DiamiterSWRatio, videoFrame.BbPixelsNumberMinRatio, videoFrame.BbPixelsNumberMaxRatio, videoFrame.ImageRegionHeightRationMin,
videoFrame.ImageRegionWidthRatioMin, videoFrame.PairsHeightRatio, videoFrame.PairsIntensityRatio, videoFrame.PairsSWRatio,
videoFrame.PairsWidthDistanceSqrRatio, videoFrame.PairsOccupationRatio, videoFrame.MinLettersNumberInTextRegion, videoFrame.MergeByDirectionAndChainEnds);
}
sWTTextDetection.DetectText(videoFrame.Frame, threadsNumber);
}
return true;
});
}
catch (Exception exception)
{
throw exception;
}
}
/// <summary>
/// Выделение текста на кд\лючевых кадрах видеоролика
/// </summary>
/// <param name="video">Видеоролик</param>
/// <returns>true</returns>
public Task<bool> DetectText(GreyVideo video, int threadsNumber)
{
try
{
if (video == null)
throw new ArgumentNullException("Null video in DetectText");
if (video.Frames == null)
throw new ArgumentNullException("Null video frames in DetectText");
return Task.Run(() =>
{
for (int i = 0; i < video.Frames.Count; i++)
if (video.Frames[i].NeedProcess)
{
EdgeDetectionFilter sobel = new SobelFilter();
SmoothingFilter gauss = new GaussFilter(this.GaussFilterSize, this.GaussFilterSigma);
GradientFilter gradientFiler = new SimpleGradientFilter();
CannyEdgeDetection canny = new CannyEdgeDetection(gauss, sobel, this.CannyLowTreshold, this.CannyHighTreshold);
SWTTextDetection SWTTextDetection = new SWTTextDetection(canny, null, gradientFiler, this.VarienceAverageSWRation,
this.AspectRatio, this.DiamiterSWRatio, this.BbPixelsNumberMinRatio, this.BbPixelsNumberMaxRatio, this.ImageRegionHeightRationMin,
this.ImageRegionWidthRatioMin, this.PairsHeightRatio, this.PairsIntensityRatio, this.PairsSWRatio,
this.PairsWidthDistanceSqrRatio, this.PairsOccupationRatio, this.MinLettersNumberInTextRegion, this.MergeByDirectionAndChainEnds);
SWTTextDetection.DetectText(video.Frames[i].Frame, threadsNumber);
}
return true;
});
}
catch (Exception exception)
{
throw exception;
}
}