/// <summary>
/// computes the joint dense histogram for a set of images.
/// </summary>
/// <param name="images"></param>
/// <param name="channels"></param>
/// <param name="hist"></param>
/// <param name="backProject"></param>
/// <param name="ranges"></param>
/// <param name="uniform"></param>
public static void CalcBackProject(Mat[] images,
int[] channels, InputArray hist, OutputArray backProject,
Rangef[] ranges, bool uniform = true)
{
if (images == null)
throw new ArgumentNullException(nameof(images));
if (channels == null)
throw new ArgumentNullException(nameof(channels));
if (hist == null)
throw new ArgumentNullException(nameof(hist));
if (backProject == null)
throw new ArgumentNullException(nameof(backProject));
if (ranges == null)
throw new ArgumentNullException(nameof(ranges));
hist.ThrowIfDisposed();
backProject.ThrowIfNotReady();
IntPtr[] imagesPtr = EnumerableEx.SelectPtrs(images);
float[][] rangesFloat = EnumerableEx.SelectToArray(
ranges, r => new [] {r.Start, r.End});
using (var rangesPtr = new ArrayAddress2<float>(rangesFloat))
{
NativeMethods.imgproc_calcBackProject(imagesPtr, images.Length, channels, hist.CvPtr,
backProject.CvPtr, rangesPtr, uniform ? 1 : 0);
}
GC.KeepAlive(images);
GC.KeepAlive(hist);
backProject.Fix();
}
/// <summary>
/// computes the joint dense histogram for a set of images.
/// </summary>
/// <param name="images"></param>
/// <param name="channels"></param>
/// <param name="mask"></param>
/// <param name="hist"></param>
/// <param name="dims"></param>
/// <param name="histSize"></param>
/// <param name="ranges"></param>
/// <param name="uniform"></param>
/// <param name="accumulate"></param>
public static void CalcHist(Mat[] images,
int[] channels, InputArray mask,
OutputArray hist, int dims, int[] histSize,
Rangef[] ranges, bool uniform = true, bool accumulate = false)
{
if (ranges == null)
throw new ArgumentNullException(nameof(ranges));
float[][] rangesFloat = EnumerableEx.SelectToArray(
ranges, r => new [] {r.Start, r.End});
CalcHist(images, channels, mask, hist, dims,
histSize, rangesFloat, uniform, accumulate);
}