如何操作dlib地标点 [英] How to manipulate dlib landmark points

问题描述

我不知道如何操作/访问dlib地标点。我在相机预览上运行代码，旨在检测一些特定的情绪。我想检查例如眼睑之间的距离或嘴唇的位置如何随时间变化等。

I wonder how can I manipulate/access the dlib landmark points. I run the code on the camera preview with the intention of detecting some particular emotions. I would like to check how for example the distance between eyelids or how the position of the lips changes in time and so on.

推荐答案

For python api - try this link（ https：// matthewearl .github.io / 2015/07/28 / switching-eds-with-python / ）

For python api - try this link (https://matthewearl.github.io/2015/07/28/switching-eds-with-python/)

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

For C++ - http://dlib.net/train_shape_predictor_ex.cpp.html sample has code for estimating interocular distance:

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);
}

同样的方式，你可以访问任何面部特征
更多信息功能号码可以在 dlib / image_processing / render_face_detections.h

Same way you can access any facial features More info about the feature numbers can be found in dlib/image_processing/render_face_detections.h

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