/// <summary>
/// This is cut down version of the method of same name in LDSpectrogramRGB.cs.
/// </summary>
/// <param name="ldSpectrogramConfig">config for ldfc spectrogram.</param>
/// <param name="outputDirectory">outputDirectory.</param>
/// <param name="indexGenerationData">indexGenerationData.</param>
/// <param name="basename">stem name of the original recording.</param>
/// <param name="indexSpectrograms">Optional spectra to pass in. If specified the spectra will not be loaded from disk!.</param>
private static string DrawSpectrogramsFromSpectralIndices(
LdSpectrogramConfig ldSpectrogramConfig,
DirectoryInfo outputDirectory,
IndexGenerationData indexGenerationData,
string basename,
Dictionary <string, double[, ]> indexSpectrograms = null)
{
string colorMap1 = ldSpectrogramConfig.ColorMap1; // SpectrogramConstants.RGBMap_ACI_ENT_EVN;
string colorMap2 = ldSpectrogramConfig.ColorMap2; // SpectrogramConstants.RGBMap_BGN_PMN_OSC;
double blueEnhanceParameter = ldSpectrogramConfig.BlueEnhanceParameter.Value;
var cs1 = new LDSpectrogramRGB(ldSpectrogramConfig, indexGenerationData, colorMap1);
string fileStem = basename;
cs1.FileName = fileStem;
// calculate start time by combining DatetimeOffset with minute offset.
cs1.StartOffset = indexGenerationData.AnalysisStartOffset;
if (indexGenerationData.RecordingStartDate.HasValue)
{
DateTimeOffset dto = (DateTimeOffset)indexGenerationData.RecordingStartDate;
cs1.RecordingStartDate = dto;
if (dto != null)
{
cs1.StartOffset = dto.TimeOfDay + cs1.StartOffset;
}
}
var indexProperties = IndexCalculateSixOnly.GetIndexProperties();
cs1.SetSpectralIndexProperties(indexProperties);
// Load the Index Spectrograms into a Dictionary
cs1.LoadSpectrogramDictionary(indexSpectrograms);
if (cs1.GetCountOfSpectrogramMatrices() == 0)
{
Log.Error("No spectrogram matrices in the dictionary. Spectrogram files do not exist?");
throw new InvalidOperationException("Cannot find spectrogram matrix files");
}
// draw all available gray scale index spectrograms.
var keys = indexProperties.Keys.ToArray();
cs1.DrawGreyScaleSpectrograms(outputDirectory, fileStem, keys);
// create two false-color spectrogram images
var image1NoChrome = cs1.DrawFalseColorSpectrogramChromeless(cs1.ColorMode, colorMap1, blueEnhanceParameter);
var image2NoChrome = cs1.DrawFalseColorSpectrogramChromeless(cs1.ColorMode, colorMap2, blueEnhanceParameter);
var spacer = new Image <Rgb24>(image1NoChrome.Width, 10);
var imageList = new[] { image1NoChrome, spacer, image2NoChrome, spacer };
Image image3 = ImageTools.CombineImagesVertically(imageList);
var outputPath = FilenameHelpers.AnalysisResultPath(outputDirectory, fileStem, "2Maps", "png");
image3.Save(outputPath);
return(outputPath);
}
public static Image DrawFalseColorSpectrograms(Arguments args, string fileStem, Dictionary <string, IndexProperties> indexProperties, Dictionary <string, double[, ]> spectra = null)
{
// note: the spectra are oriented as per visual orientation, i.e. xAxis = time framesDictionary<string, Int16>.KeyCollection keys = AuthorList.Keys
// string[] keys = spectra.Keys.ToCommaSeparatedList().Split(',');
// int frameCount = spectra[keys[0]].GetLength(1);
int sampleRate = 22050;
int frameWidth = 512;
double backgroundFilter = 0.75; // 0.75 means small values are accentuated.
var minuteOffset = TimeSpan.Zero;
var dataScale = args.TemporalScale;
string colorMap = args.ColourMap1 ?? LDSpectrogramRGB.DefaultColorMap1;
var cs1 = new LDSpectrogramRGB(minuteOffset, dataScale, sampleRate, frameWidth, colorMap)
{
FileName = fileStem,
BackgroundFilter = backgroundFilter,
IndexCalculationDuration = dataScale,
};
// set the relevant dictionary of index properties
cs1.SetSpectralIndexProperties(indexProperties);
cs1.SpectrogramMatrices = spectra;
// get parameter from the config file.
var configFile = args.FalseColourSpectrogramConfig.ToFileInfo();
var config = LdSpectrogramConfig.ReadYamlToConfig(configFile);
var blueEnhanceParameter = config.BlueEnhanceParameter ?? 0.0;
var image1 = cs1.DrawFalseColorSpectrogramChromeless("NEGATIVE", colorMap, blueEnhanceParameter);
var fullDuration = TimeSpan.FromSeconds(image1.Width * dataScale.TotalSeconds);
string title = fileStem;
var titleImage = LDSpectrogramRGB.DrawTitleBarOfFalseColourSpectrogram(title, image1.Width);
int trackHeight = 20;
var timeScale = ImageTrack.DrawTimeRelativeTrack(fullDuration, image1.Width, trackHeight);
colorMap = args.ColourMap2 ?? LDSpectrogramRGB.DefaultColorMap2;
var image2 = cs1.DrawFalseColorSpectrogramChromeless("NEGATIVE", colorMap, blueEnhanceParameter);
var list = new List <Image> {
titleImage, image1, timeScale, image2
};
var combinedImage = ImageTools.CombineImagesVertically(list.ToArray());
return(combinedImage);
}
