public double Correlate(FreeImageAlgorithmsBitmap backgroundImage, FreeImageAlgorithmsBitmap fib,
CorrelationTile tile1, CorrelationTile tile2,
bool randomise, out Point pt)
{
this.backgroundIntersectArea = Rectangle.Empty;
this.searchArea = Rectangle.Empty;
this.searchAreaWithinMosaic = Rectangle.Empty;
double measure = 0.0;
pt = new Point();
// Find the intersection between the tile and the background drawn bounds.
this.backgroundIntersectArea = Rectangle.Intersect(tile1.CorrelatedBoundsRelativeToOrigin, tile2.CorrelatedBoundsRelativeToOrigin);
if (this.backgroundIntersectArea == Rectangle.Empty)
{
SendFeedback(String.Format("{0} and {1} did not intersect ?", tile1.Tile.FileName, tile2.Tile.FileName)
+ Environment.NewLine, Color.Red);
return(0.0);
}
// determine the area over which to perform the correlation
// defines the maximum shift allowed of the new tile.
this.searchArea = this.SearchBounds(this.backgroundIntersectArea, randomise);
// find the kernel area in the bg image
this.kernelAreaWithinBackground = this.KernelBounds(this.backgroundIntersectArea, this.searchArea, randomise);
// locate the area in the new image
this.kernelArea = this.kernelAreaWithinBackground;
this.kernelArea.X -= tile1.CorrelatedBoundsRelativeToOrigin.X;
this.kernelArea.Y -= tile1.CorrelatedBoundsRelativeToOrigin.Y;
// Call start correlation delegate, for screen update
this.SendTileCorrelatationBegin(tile1, fib);
if (KernalBasedOverlapCorrelator.prefilter == null)
{
backgroundImage.KernelCorrelateImageRegions(fib, backgroundIntersectArea, kernelArea,
this.searchArea, out pt, out measure);
}
else
{
backgroundImage.KernelCorrelateImageRegions(fib, backgroundIntersectArea, kernelArea, this.searchArea,
KernalBasedOverlapCorrelator.prefilter, out pt, out measure);
}
if (measure > KernalBasedOverlapCorrelator.GoodCorrelation)
{
pt = CorrelationTile.TranslateBackgroundPointToMosaicPoint(pt);
return(measure);
}
if (tile1.NumberOfAtemptedCorrelations < CorrelationTile.MaxNumberOfCorrelationAttempts)
{
tile1.NumberOfAtemptedCorrelations++;
return(this.Correlate(backgroundImage, fib, tile1, tile2,
this.knownOverlapCorrelatorOptionPanel.RandomKernelSearch, out pt));
}
else
{
// If we are debugging lets pause the thread for closer inspection
#if DEBUG
this.CorrelationPause();
#endif
}
return(measure);
}
