public double CompareSimilarity(FaceEmbeddings emb1, FaceEmbeddings emb2)
{
var mat1 = emb1.CreateMatFromEmbeddings(emb1.Embeddings);
var mat2 = emb2.CreateMatFromEmbeddings(emb2.Embeddings);
// l2 normalize the vectors
for (int i = 0; i < 128; i++)
{
mat1.put(0, i, mat1.get(0, i)[0] / Core.norm(mat1, 4));
}
for (int i = 0; i < 128; i++)
{
mat2.put(0, i, mat2.get(0, i)[0] / Core.norm(mat2, 4));
}
if (mat1 == null || mat2 == null)
{
return(1000.0);
}
var ab = mat1.dot(mat2);
var aMagni = Core.norm(mat1);
var bMagni = Core.norm(mat2);
var cos_sim = ab / (aMagni * bMagni);
mat1.Dispose(); mat2.Dispose();
return(1 - cos_sim);
}
/// <summary>
/// Calculate the euclidean distance between 2 FaceEmbeddings objects.
/// </summary>
/// <param name="emb1"></param>
/// <param name="emb2"></param>
/// <returns> double </returns>
public double CompareEmbeddings(FaceEmbeddings emb1, FaceEmbeddings emb2)
{
var mat1 = emb1.CreateMatFromEmbeddings(emb1.Embeddings);
var mat2 = emb2.CreateMatFromEmbeddings(emb2.Embeddings);
if (mat1 == null || mat2 == null)
{
return(1000.0);
}
var diff = mat1 - mat2;
var result = diff.dot(diff);
result = Mathf.Sqrt((float)result);
return(result);
}
public FaceEmbeddings ExtractFaceEmbeddings(Texture2D imageTex, UnityEngine.Rect ROI)
{
//if true, The error log of the Native side OpenCV will be displayed on the Unity Editor Console.
Utils.setDebugMode(true);
var embedder = Dnn.readNetFromTorch(model_filepath);
Mat img = new Mat(imageTex.height, imageTex.width, CvType.CV_8UC3);
Imgproc.cvtColor(img, img, Imgproc.COLOR_BGR2RGB);
Utils.texture2DToMat(imageTex, img);
if (img.empty())
{
Debug.LogError(input_filepath + " is not loaded. Please see \"StreamingAssets/dnn/setup_dnn_module.pdf\". ");
img = new Mat(424, 640, CvType.CV_8UC3, new Scalar(0, 0, 0));
}
Mat cropped_face = img.submat((int)ROI.y, (int)ROI.y + (int)ROI.height, (int)ROI.x, (int)ROI.width + (int)ROI.x);
Imgproc.cvtColor(cropped_face, cropped_face, Imgproc.COLOR_BGR2RGB);
var faceBlob = Dnn.blobFromImage(cropped_face, scalefactor, new Size(inpWidth, inpHeight), new Scalar(0, 0, 0), true, false);
embedder.setInput(faceBlob);
var netOut = embedder.forward();
var embeddings = new FaceEmbeddings(netOut, 128);
if (gameObject.GetComponent <Renderer>() != null && displayBB)
{
GenericUtils.AdjustImageScale(cropped_face, this.gameObject);
Texture2D texture = new Texture2D(cropped_face.cols(), cropped_face.rows(), TextureFormat.RGBA32, false);
Utils.matToTexture2D(cropped_face, texture);
gameObject.GetComponent <Renderer>().material.mainTexture = texture;
}
embedder.Dispose();
cropped_face.Dispose();
img.Dispose();
netOut.Dispose();
return(embeddings);
}