如何操作 dlib 地标点

Question

我想知道如何 manipulate/access dlib 地标点。我运行相机预览中的代码旨在检测某些特定情绪。我想检查一下眼皮之间的距离或嘴唇的位置如何随时间变化等。

Answer 1

对于 python api - 试试这个 link (https://matthewearl.github.io/2015/07/28/switching-eds-with-python/)

对于 C++ - http://dlib.net/train_shape_predictor_ex.cpp.html 示例具有用于估计双眼距离的代码：

double interocular_distance (
    const full_object_detection& det
)
{
    dlib::vector<double,2> l, r;
    double cnt = 0;
    // Find the center of the left eye by averaging the points around 
    // the eye.
    for (unsigned long i = 36; i <= 41; ++i) 
    {
        l += det.part(i);
        ++cnt;
    }
    l /= cnt;

    // Find the center of the right eye by averaging the points around 
    // the eye.
    cnt = 0;
    for (unsigned long i = 42; i <= 47; ++i) 
    {
        r += det.part(i);
        ++cnt;
    }
    r /= cnt;

    // Now return the distance between the centers of the eyes
    return length(l-r);
}

访问任何面部特征的方式相同有关功能编号的更多信息，请参见 dlib/image_processing/render_face_detections.h

如何操作 dlib 地标点

How to manipulate dlib landmark points

c++

opencv

image-processing

face-detection

dlib