/// <summary>
/// 提取出边框盒
/// </summary>
/// <param name="outputs"></param>
/// <returns></returns>
private Dictionary <Point, List <CubicBoundingBox> > ExtractBoundingBox(Dictionary <Point, float[]> outputs)
{
Dictionary <Point, List <CubicBoundingBox> > boxesInCells = new Dictionary <Point, List <CubicBoundingBox> >();
int outputCountPerAnchor = 9 * 2 + classOut + 1;
foreach (var output in outputs)
{
List <CubicBoundingBox> boxes = new List <CubicBoundingBox>();
for (int i = 0; i < anchorCount; ++i)
{
int anchorOffset = i * outputCountPerAnchor;
var outputValue = output.Value;
//���������
//var confidentValue = Sigmoid(outputValue[2 * 9 + anchorOffset]);
PointF centerPoint = new PointF((Sigmoid(outputValue[0 + anchorOffset]) + output.Key.X) / SegementsSize.Width, (Sigmoid(outputValue[1 + anchorOffset]) + output.Key.Y) / SegementsSize.Height);
CubicBoundingBox cubicBoundingBoxes = new CubicBoundingBox();
cubicBoundingBoxes.ControlPoint[8] = centerPoint;
for (int j = 2; j < 2 + 8 * 2; j += 2)
{
PointF point = new PointF((outputValue[j + anchorOffset] + output.Key.X) / SegementsSize.Width, (outputValue[j + 1 + anchorOffset] + output.Key.Y) / SegementsSize.Height);
cubicBoundingBoxes.ControlPoint[j / 2 - 1] = point;
}
boxes.Add(cubicBoundingBoxes);
}
boxesInCells.Add(output.Key, boxes);
}
return(boxesInCells);
}
public async Task <List <CubicBoundingBox> > DetectObjectPoseFromImagePixelsAsync(byte[] imagePixels)
{
List <CubicBoundingBox> boxes = new List <CubicBoundingBox>();
using (var imageTensor = ConvertPixelsByteToTensor(imagePixels, BitmapPixelFormat.Bgra8))
using (var input = new SingelObjectApeModelV8Input()
{
Image = imageTensor
})
using (var output = await model.EvaluateAsync(input).ConfigureAwait(true))
{
var shape = output.Grid.Shape;
var content = output.Grid.GetAsVectorView().ToArray();
List <float[]> abc = new List <float[]>
{
content
};
using (OutputParser outputParser = new OutputParser(abc, classCount, anchorCount, confThresh))
{
foreach (var box in outputParser.BoundingBoxes)
{
var newBox = new CubicBoundingBox()
{
Confidence = box.Confidence,
Identity = box.Identity
};
foreach (var point in box.ControlPoint)
{
newBox.ControlPoint.Append(point);
}
boxes.Add(box);
}
}
}
return(boxes);
}