public async Task <IRenderedImage> DetectStars(
bool annotateImage,
StarSensitivityEnum sensitivity,
NoiseReductionEnum noiseReduction,
CancellationToken cancelToken = default,
IProgress <ApplicationStatus> progress = default(Progress <ApplicationStatus>))
{
var starDetection = new StarDetection(this, this.Image.Format, sensitivity, noiseReduction);
await starDetection.DetectAsync(progress, cancelToken);
var image = annotateImage ? starDetection.GetAnnotatedImage() : this.Image;
this.RawImageData.StarDetectionAnalysis.HFR = starDetection.AverageHFR;
this.RawImageData.StarDetectionAnalysis.DetectedStars = starDetection.DetectedStars;
return(new RenderedImage(image: image, rawImageData: this.RawImageData));
}
public StarDetection(IRenderedImage renderedImage, StarSensitivityEnum sensitivity, NoiseReductionEnum noiseReduction)
{
var imageData = renderedImage.RawImageData;
imageProperties = imageData.Properties;
// TODO: StarDetection should probably be more of a static function that returns a result type than a stateful object with awaitable methods
// Checking the type of rendered image is a hack until then
_iarr = imageData.Data;
//If image was debayered, use debayered array for star HFR and local maximum identification
if (imageProperties.IsBayered && (renderedImage is IDebayeredImage))
{
var debayeredImage = (IDebayeredImage)renderedImage;
var debayeredData = debayeredImage.DebayeredData;
if (debayeredData != null && debayeredData.Lum != null && debayeredData.Lum.Length > 0)
{
_iarr = new ImageArray(debayeredData.Lum);
}
}
_originalBitmapSource = renderedImage.Image;
_sensitivity = sensitivity;
_noiseReduction = noiseReduction;
_resizefactor = 1.0;
if (imageProperties.Width > _maxWidth)
{
if (_sensitivity == StarSensitivityEnum.Highest)
{
_resizefactor = Math.Max(0.625, (double)_maxWidth / imageProperties.Width);
}
else
{
_resizefactor = (double)_maxWidth / imageProperties.Width;
}
}
_inverseResizefactor = 1.0 / _resizefactor;
_minStarSize = (int)Math.Floor(5 * _resizefactor);
//Prevent Hotpixels to be detected
if (_minStarSize < 2)
{
_minStarSize = 2;
}
_maxStarSize = (int)Math.Ceiling(150 * _resizefactor);
}
public StarDetection(IRenderedImage renderedImage, System.Windows.Media.PixelFormat pf, StarSensitivityEnum sensitivity, NoiseReductionEnum noiseReduction)
: this(renderedImage, sensitivity, noiseReduction)
{
if (pf == PixelFormats.Rgb48)
{
using (var source = ImageUtility.BitmapFromSource(_originalBitmapSource, System.Drawing.Imaging.PixelFormat.Format48bppRgb)) {
using (var img = new Grayscale(0.2125, 0.7154, 0.0721).Apply(source)) {
_originalBitmapSource = ImageUtility.ConvertBitmap(img, System.Windows.Media.PixelFormats.Gray16);
_originalBitmapSource.Freeze();
}
}
}
}