/// <summary>
/// 单人脸特征提取
/// </summary>
/// <param name="imageFormat">图片格式</param>
/// <param name="image">图片</param>
/// <param name="multiFaceInfo">人脸框对象</param>
/// <param name="faceIndex">人脸索引</param>
/// <param name="faceFeature">[out]特征结果</param>
/// <returns>返回0表示正常；返回负数请根据ErrorCodeUtil类注释查看；其他值请在官网-帮助中心查询</returns>
public int ASFFaceFeatureExtractEx(Image image, MultiFaceInfo multiFaceInfo, out FaceFeature faceFeature, int faceIndex = 0, ASF_ImagePixelFormat imageFormat = ASF_ImagePixelFormat.ASVL_PAF_RGB24_B8G8R8)
{
int retCode = -1;
faceFeature = new FaceFeature();
if (multiFaceInfo == null)
{
return(ErrorCodeUtil.MULPTIFACEINFO_IS_NULL);
}
if (faceIndex >= multiFaceInfo.faceNum)
{
return(ErrorCodeUtil.FACEINDEX_INVALID);
}
if (image == null)
{
return(ErrorCodeUtil.IMAGE_IS_NULL);
}
ImageInfo imageInfo = new ImageInfo();
imageInfo = ASF_ImagePixelFormat.ASVL_PAF_RGB24_B8G8R8.Equals(imageFormat) ? ImageUtil.ReadBMP(image) : ImageUtil.ReadBMP_IR(image);
if (imageInfo == null)
{
return(ErrorCodeUtil.IMAGE_DATA_READ_FAIL);
}
//转化单人脸信息
SingleFaceInfo singleFaceInfo = new SingleFaceInfo();
IntPtr pSIngleFaceInfo = MemoryUtil.Malloc(MemoryUtil.SizeOf <SingleFaceInfo>());
singleFaceInfo.faceRect = multiFaceInfo.faceRects[faceIndex];
singleFaceInfo.faceOrient = multiFaceInfo.faceOrients[faceIndex];
MemoryUtil.StructureToPtr(singleFaceInfo, pSIngleFaceInfo);
IntPtr pAsfFaceFeature = MemoryUtil.Malloc(MemoryUtil.SizeOf <ASF_FaceFeature>());
ASF_ImageData asfInfoData = CommonUtil.TransImageDataStructByImageInfo(imageInfo);
IntPtr pImageInfo = MemoryUtil.Malloc(MemoryUtil.SizeOf <ASF_ImageData>());
MemoryUtil.StructureToPtr(asfInfoData, pImageInfo);
//调用SDK接口
retCode = ASFFunctions.ASFFaceFeatureExtractEx(pEngine, pImageInfo, pSIngleFaceInfo, pAsfFaceFeature);
if (retCode != 0)
{
MemoryUtil.FreeArray(pSIngleFaceInfo, pAsfFaceFeature, imageInfo.imgData, pImageInfo);
return(retCode);
}
ASF_FaceFeature asfFeature = MemoryUtil.PtrToStructure <ASF_FaceFeature>(pAsfFaceFeature);
byte[] feature = new byte[asfFeature.featureSize];
MemoryUtil.Copy(asfFeature.feature, feature, 0, asfFeature.featureSize);
faceFeature.featureSize = asfFeature.featureSize;
faceFeature.feature = feature;
MemoryUtil.FreeArray(pSIngleFaceInfo, pAsfFaceFeature, imageInfo.imgData, pImageInfo);
return(retCode);
}