/// <summary>
/// This method compares the acoustic indices derived from two different long duration recordings of the same length.
/// It takes as input any number of csv files of acoustic indices in spectrogram columns.
/// Typically there will be at least three indices csv files for each of the original recordings to be compared.
/// The method produces four spectrogram image files:
/// 1) A negative false-color spectrogram derived from the indices of recording 1.
/// 2) A negative false-color spectrogram derived from the indices of recording 2.
/// 3) A spectrogram of euclidean distances between the two input files.
/// 4) The above three spectrograms combined in one image.
/// </summary>
public static void DrawDistanceSpectrogram(
DirectoryInfo inputDirectory,
FileInfo inputFileName1,
FileInfo inputFileName2,
DirectoryInfo outputDirectory)
{
// PARAMETERS
string outputFileName1 = inputFileName1.Name;
var cs1 = new LDSpectrogramRGB(minuteOffset, xScale, sampleRate, frameWidth, colorMap);
cs1.ColorMode = colorMap;
cs1.BackgroundFilter = backgroundFilterCoeff;
string[] keys = colorMap.Split('-');
cs1.ReadCsvFiles(inputDirectory, inputFileName1.Name, keys);
double blueEnhanceParameter = 0.0;
cs1.DrawNegativeFalseColorSpectrogram(outputDirectory, outputFileName1, blueEnhanceParameter);
string imagePath = Path.Combine(outputDirectory.FullName, outputFileName1 + ".COLNEG.png");
var spg1Image = Image.Load <Rgb24>(imagePath);
if (spg1Image == null)
{
LoggedConsole.WriteLine("SPECTROGRAM IMAGE DOES NOT EXIST: {0}", imagePath);
return;
}
int nyquist = cs1.SampleRate / 2;
int hertzInterval = 1000;
string title =
$"FALSE COLOUR SPECTROGRAM: {inputFileName1}. (scale:hours x kHz) (colour: R-G-B={cs1.ColorMode})";
var titleBar = LDSpectrogramRGB.DrawTitleBarOfFalseColourSpectrogram(title, spg1Image.Width);
spg1Image = LDSpectrogramRGB.FrameLDSpectrogram(
spg1Image,
titleBar,
cs1,
nyquist,
hertzInterval);
string outputFileName2 = inputFileName2.Name;
var cs2 = new LDSpectrogramRGB(minuteOffset, xScale, sampleRate, frameWidth, colorMap)
{
ColorMode = colorMap,
BackgroundFilter = backgroundFilterCoeff,
};
cs2.ReadCsvFiles(inputDirectory, inputFileName2.Name, keys);
// cs2.DrawGreyScaleSpectrograms(opdir, opFileName2);
cs2.DrawNegativeFalseColorSpectrogram(outputDirectory, outputFileName2, blueEnhanceParameter);
imagePath = Path.Combine(outputDirectory.FullName, outputFileName2 + ".COLNEG.png");
var spg2Image = Image.Load <Rgb24>(imagePath);
if (spg2Image == null)
{
LoggedConsole.WriteLine("SPECTROGRAM IMAGE DOES NOT EXIST: {0}", imagePath);
return;
}
title =
$"FALSE COLOUR SPECTROGRAM: {inputFileName2}. (scale:hours x kHz) (colour: R-G-B={cs2.ColorMode})";
titleBar = LDSpectrogramRGB.DrawTitleBarOfFalseColourSpectrogram(title, spg2Image.Width);
spg2Image = LDSpectrogramRGB.FrameLDSpectrogram(
spg2Image,
titleBar,
cs1,
nyquist,
hertzInterval);
string outputFileName4 = inputFileName1 + ".EuclideanDistance.png";
var deltaSp = DrawDistanceSpectrogram(cs1, cs2);
Color[] colorArray = LDSpectrogramRGB.ColourChart2Array(GetDifferenceColourChart());
titleBar = DrawTitleBarOfEuclidianDistanceSpectrogram(
inputFileName1.Name,
inputFileName2.Name,
colorArray,
deltaSp.Width,
SpectrogramConstants.HEIGHT_OF_TITLE_BAR);
deltaSp = LDSpectrogramRGB.FrameLDSpectrogram(deltaSp, titleBar, cs2, nyquist, hertzInterval);
deltaSp.Save(Path.Combine(outputDirectory.FullName, outputFileName4));
string outputFileName5 = inputFileName1 + ".2SpectrogramsAndDistance.png";
var combinedImage = ImageTools.CombineImagesVertically(spg1Image, spg2Image, deltaSp);
combinedImage.Save(Path.Combine(outputDirectory.FullName, outputFileName5));
}