Color filtering in HSL color space.
The filter operates in HSL color space and filters pixels, which color is inside/outside of the specified HSL range - it keeps pixels with colors inside/outside of the specified range and fills the rest with
The filter accepts 24 and 32 bpp color images for processing.
Sample usage:
// create filter HSLFiltering filter = new HSLFiltering( ); // set color ranges to keep filter.Hue = new IntRange( 335, 0 ); filter.Saturation = new Range( 0.6f, 1 ); filter.Luminance = new Range( 0.1f, 1 ); // apply the filter filter.ApplyInPlace( image ); Initial image:
Result image:
Sample usage with saturation update only:
// create filter HSLFiltering filter = new HSLFiltering( ); // configure the filter filter.Hue = new IntRange( 340, 20 ); filter.UpdateLuminance = false; filter.UpdateHue = false; // apply the filter filter.ApplyInPlace( image ); Result image:
private void SetFilter()
{
ImageType = ImageTypes.Rgb32bpp;
Af.HSLFiltering newFilter = new Af.HSLFiltering();
newFilter.FillColor = Accord.Imaging.HSL.FromRGB(new Accord.Imaging.RGB(color));
newFilter.Hue = new Accord.IntRange((int)Remap(hue.T0, 0, 359), (int)Remap(hue.T1, 0, 359));
newFilter.Saturation = new Accord.Range((float)saturation.T0, (float)saturation.T1);
newFilter.Luminance = new Accord.Range((float)luminance.T0, (float)luminance.T1);
newFilter.FillOutsideRange = outside;
imageFilter = newFilter;
}
/// <summary>
/// Initializes a new instance of the <see cref="HslBlobTracker"/> class.
/// </summary>
///
/// <param name="filter">The filter.</param>
///
public HslBlobTracker(HSLFiltering filter)
{
this.filter = filter;
this.blobCounter = new BlobCounter();
this.trackingObject = new TrackingObject();
blobCounter.CoupledSizeFiltering = false;
blobCounter.FilterBlobs = true;
}