void _kernel(SpanTensor2 <Pixel.RGB24> src, SpanTensor2 <Pixel.Luminance8> dst)
{
// src & dst dimensions must be 512x512
var workingTensor = _Session.GetInputTensor <float>(0)
.AsSpanTensor4()
.GetSubTensor(0)
.VerifyDimensions(3, 512, 512);
SpanTensor.Copy(src.DownCast <Byte>(), workingTensor[0], workingTensor[1], workingTensor[2], MultiplyAdd.CreateMul(255).GetInverse());
// increase image contrast (optional)
var imagePreprocessor = new ImageProcessor <Pixel.RGB96F>();
imagePreprocessor.ColorTransform = MultiplyAdd.CreateAdd(-0.5f).ConcatMul(1.7f);
imagePreprocessor.ColorTransform.ApplyTransformTo(workingTensor.Span);
_Session.Inference();
var result = _Session.GetOutputTensor <float>(0)
.AsSpanTensor4()
.GetSubTensor(0)
.VerifyDimensions(1, 512, 512)
.GetSubTensor(0);
SpanTensor.Copy(result, dst.Cast <Byte>(), MultiplyAdd.CreateMul(255));
}
public FullStackFaceInfo[] Process(SpanBitmap srcImage)
{
var workingTensor = _Session.UseInputTensor <Byte>(0, srcImage.Height, srcImage.Width, 3)
.AsSpanTensor3()
.UpCast <Pixel.RGB24>();
workingTensor.AsSpanBitmap().AsTypeless().SetPixels(0, 0, srcImage);
_Session.Inference();
var scores = _Session.GetOutputTensor <float>(0).VerifyName(n => n == "scores").AsSpanTensor1();
var bboxes = _Session.GetOutputTensor <Int64>(1).VerifyName(n => n == "bboxes").AsSpanTensor2();
var kpss = _Session.GetOutputTensor <Int64>(2).VerifyName(n => n == "kpss").AsSpanTensor3();
var align_imgs = _Session.GetOutputTensor <byte>(3).VerifyName(n => n == "align_imgs").AsSpanTensor4().UpCast <Pixel.BGR24>();
var lmks = _Session.GetOutputTensor <Int64>(4).VerifyName(n => n == "lmks").AsSpanTensor3();
var M = _Session.GetOutputTensor <float>(5).VerifyName(n => n == "M").AsSpanTensor3().UpCast <System.Numerics.Vector3>();
return(FullStackFaceInfo.Parse(scores, bboxes, align_imgs, lmks));
}