Class ZoomTiledSpectrograms

Inheritance
Object
ZoomTiledSpectrograms
Inherited Members
Namespace: AudioAnalysisTools.LongDurationSpectrograms.Zooming
Assembly: AudioAnalysisTools.dll
Syntax
public static class ZoomTiledSpectrograms

Methods

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CombineFrameDataWithIndexData(Double[,], Double[,], Double, Double)

THis method is a way of getting the acoustic index data at 0.2 second resolution to have some influence on the frame spectrograms at 0.02s resolution. We cannot assume that the two matrices will have the same number of columns i.e. same temporal duration. The frame data has been padded to one minute duration. But the last index matrix will probably NOT be the full one minute duration. Therefore assume that indexData matrix will be shorter and take its column count.

Declaration
public static void CombineFrameDataWithIndexData(double[, ] frameData, double[, ] indexData, double frameWt, double indexWt)
Parameters
Type Name Description
Double[,] frameData
Double[,] indexData
Double frameWt
Double indexWt
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DrawFrameSpectrogramAtScale(LdSpectrogramConfig, SpectrogramZoomingConfig, TimeSpan, TimeSpan, Double[,], IndexGenerationData, ImageChrome)

Declaration
public static Image<Rgb24> DrawFrameSpectrogramAtScale(LdSpectrogramConfig config, SpectrogramZoomingConfig zoomingConfig, TimeSpan startTimeOfData, TimeSpan frameScale, double[, ] frameData, IndexGenerationData indexGeneration, ImageChrome chromeOption)
Parameters
Type Name Description
LdSpectrogramConfig config
SpectrogramZoomingConfig zoomingConfig
TimeSpan startTimeOfData
TimeSpan frameScale
Double[,] frameData
IndexGenerationData indexGeneration
ImageChrome chromeOption
Returns
Type Description
SixLabors.ImageSharp.Image<SixLabors.ImageSharp.PixelFormats.Rgb24>
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DrawOneScaledIndexSpectrogramTile(LdSpectrogramConfig, IndexGenerationData, Dictionary<String, IndexProperties>, TimeSpan, TimeSpan, TimeSpan, Int32, Dictionary<String, Double[,]>, String, ImageChrome)

Declaration
public static Image<Rgb24> DrawOneScaledIndexSpectrogramTile(LdSpectrogramConfig config, IndexGenerationData indexGenerationData, Dictionary<string, IndexProperties> indexProperties, TimeSpan startTime, TimeSpan dataScale, TimeSpan imageScale, int superTileImageWidth, Dictionary<string, double[, ]> spectra, string basename, ImageChrome chromeOption)
Parameters
Type Name Description
LdSpectrogramConfig config
IndexGenerationData indexGenerationData
Dictionary<String, IndexProperties> indexProperties
TimeSpan startTime
TimeSpan dataScale
TimeSpan imageScale
Int32 superTileImageWidth
Dictionary<String, Double[,]> spectra
String basename
ImageChrome chromeOption
Returns
Type Description
SixLabors.ImageSharp.Image<SixLabors.ImageSharp.PixelFormats.Rgb24>
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DrawSuperTilesAtScaleFromIndexSpectrograms(LdSpectrogramConfig, Dictionary<String, IndexProperties>, SpectrogramZoomingConfig, TimeSpan, Dictionary<String, Double[,]>, IndexGenerationData, String, ImageChrome, TimeSpan)

Draws FC index spectrograms for an entire row.

Declaration
public static TimeOffsetSingleLayerSuperTile[] DrawSuperTilesAtScaleFromIndexSpectrograms(LdSpectrogramConfig analysisConfig, Dictionary<string, IndexProperties> indexProperties, SpectrogramZoomingConfig zoomingConfig, TimeSpan imageScale, Dictionary<string, double[, ]> spectra, IndexGenerationData indexGeneration, string basename, ImageChrome chromeOption, TimeSpan alignmentPadding)
Parameters
Type Name Description
LdSpectrogramConfig analysisConfig
Dictionary<String, IndexProperties> indexProperties
SpectrogramZoomingConfig zoomingConfig
TimeSpan imageScale
Dictionary<String, Double[,]> spectra
IndexGenerationData indexGeneration
String basename
ImageChrome chromeOption
TimeSpan alignmentPadding
Returns
Type Description
TimeOffsetSingleLayerSuperTile[]
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DrawSuperTilesFromSingleFrameSpectrogram(DirectoryInfo, LdSpectrogramConfig, Dictionary<String, IndexProperties>, SpectrogramZoomingConfig, Int32, Double[], String, IndexGenerationData, ImageChrome, TimeSpan)

Assume that we are processing data for one minute only. From this one minute of data, we produce images at three scales. A one minute recording framed at 20ms should yield 3000 frames. But to achieve this where sr= 22050 and frameSize=512, we need an overlap of 71 samples. Consequently only 2999 frames returned per minute. Therefore have to pad end to get 3000 frames.

Declaration
public static TimeOffsetSingleLayerSuperTile[] DrawSuperTilesFromSingleFrameSpectrogram(DirectoryInfo dataDir, LdSpectrogramConfig analysisConfig, Dictionary<string, IndexProperties> indexProperties, SpectrogramZoomingConfig zoomingConfig, int minute, double[] imageScales, string basename, IndexGenerationData indexGeneration, ImageChrome chromeOption, TimeSpan alignmentPadding)
Parameters
Type Name Description
DirectoryInfo dataDir
LdSpectrogramConfig analysisConfig
Dictionary<String, IndexProperties> indexProperties
SpectrogramZoomingConfig zoomingConfig
Int32 minute
Double[] imageScales
String basename
IndexGenerationData indexGeneration
ImageChrome chromeOption
TimeSpan alignmentPadding
Returns
Type Description
TimeOffsetSingleLayerSuperTile[]
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DrawTiles(AnalysisIoInputDirectory, ZoomParameters, String)

THIS IS ENTRY METHOD FOR TILING SPECTROGRAMS.

Declaration
public static void DrawTiles(AnalysisIoInputDirectory io, ZoomParameters common, string analysisTag)
Parameters
Type Name Description
AnalysisIoInputDirectory io
ZoomParameters common
String analysisTag
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GetPreviousTileBoundary(Int32, Double, DateTimeOffset)

Declaration
public static DateTimeOffset GetPreviousTileBoundary(int tileWidth, double scale, DateTimeOffset recordingStartDate)
Parameters
Type Name Description
Int32 tileWidth
Double scale
DateTimeOffset recordingStartDate
Returns
Type Description
DateTimeOffset
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PadEndOfListOfFrames(List<Double[]>, Int32)

THis method pads the end of a list of frames read from a csv file. The frame count will be one less than expected for the recording segment because of frame overlap Therefore pad the end of the list of frames with the last frame.

Declaration
public static void PadEndOfListOfFrames(List<double[]> frameList, int expectedFrameCount)
Parameters
Type Name Description
List<Double[]> frameList
Int32 expectedFrameCount
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TrimEndOfListOfFrames(List<Double[]>, Int32)

THis method trims the end of a list of frames read from a csv file. Sometimes inaccuracies in cutting audio produced frame counts that are too long. Therefore too many columns are rendered. Simply remove the end frames and issue a warning. TODO: a better solution would be to interpolate the extra frames... but too hard at the moment.

Declaration
public static void TrimEndOfListOfFrames(List<double[]> frameList, int expectedFrameCount)
Parameters
Type Name Description
List<Double[]> frameList
Int32 expectedFrameCount