首先需要获取人脸 68 个特征点坐标，并写入 txt 文件，方便后面使用,这里会用到的代码

import dlib
import cv2

predictor_path  = "E:/data_ceshi/shape_predictor_68_face_landmarks.dat"
png_path = "E:/data_ceshi/timg.jpg"

txt_path = "E:/data_ceshi/points.txt"
f = open(txt_path,'w+')


detector = dlib.get_frontal_face_detector()
#相撞
predicator = dlib.shape_predictor(predictor_path)
win = dlib.image_window()
img1 = cv2.imread(png_path)


dets = detector(img1,1)
print("Number of faces detected : {}".format(len(dets)))
for k,d in enumerate(dets):
    print("Detection {}  left:{}  Top: {} Right {}  Bottom {}".format(
        k,d.left(),d.top(),d.right(),d.bottom()
    ))
    lanmarks = [[p.x,p.y] for p in predicator(img1,d).parts()]
    for idx,point in enumerate(lanmarks):
        f.write(str(point[0]))
        f.write("\t")
        f.write(str(point[1]))
        f.write('\n')

上面代码一点问题没有
下面代码一对问题， 我又不会python，之后java
花费我 3天时间 才 把问题修复完， 放在我另一篇文章里了

import cv2
import numpy as np
import random

#Check if a point is insied a rectangle
def rect_contains(rect,point):
    if point[0] <rect[0]:
        return False
    elif point[1]<rect[1]:
        return  False
    elif point[0]>rect[2]:
        return False
    elif point[1] >rect[3]:
        return False
    return True

# Draw a point
def draw_point(img,p,color):
    cv2.circle(img,p,2,color)

#Draw delaunay triangles
def draw_delaunay(img,subdiv,delaunay_color):
    trangleList = subdiv.getTriangleList()
    size = img.shape
    r = (0,0,size[1],size[0])
    for t in  trangleList:
        pt1 = (t[0],t[1])
        pt2 = (t[2],t[3])
        pt3 = (t[4],t[5])
        if (rect_contains(r,pt1) and rect_contains(r,pt2) and rect_contains(r,pt3)):
            cv2.line(img,pt1,pt2,delaunay_color,1)
            cv2.line(img,pt2,pt3,delaunay_color,1)
            cv2.line(img,pt3,pt1,delaunay_color,1)

# Draw voronoi diagram
def draw_voronoi(img,subdiv):
    (facets,centers) = subdiv.getVoronoiFacetList([])

    for i in range(0,len(facets)):
        ifacet_arr = []
        for f in facets[i]:
            ifacet_arr.append(f)

        ifacet = np.array(ifacet_arr,np.int)
        color = (random.randint(0,255),random.randint(0,255),random.randint(0,255))
        cv2.fillConvexPoly(img,ifacet,color)
        ifacets = np.array([ifacet])
        cv2.polylines(img,ifacets,True,(0,0,0),1)
        cv2.circle(img,(centers[i][0],centers[i][1]),3,(0,0,0))


if __name__ == '__main__':
    #Define window names;
    win_delaunary = "Delaunay Triangulation"
    win_voronoi = "Voronoi Diagram"

    #Turn on animations while drawing triangles
    animate = True

    #Define colors for drawing
    delaunary_color = (255,255,255)
    points_color = (0,0,255)

    #Read in the image
    img_path = "E:/data_ceshi/timg.jpg"

    img = cv2.imread(img_path)

    #Keep a copy   around
    img_orig = img.copy()

    #Rectangle to be used with Subdiv2D
    size = img.shape
    rect = (0,0,size[1],size[0])

    #Create an instance of Subdiv2d
    subdiv = cv2.Subdiv2D(rect)
    #Create an array of points
    points = []
    #Read in the points from a text file
    with open("E:/data_ceshi/points.txt") as file:
        for line in file:
            x,y = line.split()
            points.append((int(x),int(y)))
    #Insert points into subdiv
    for p in points:
        subdiv.insert(p)

        #Show animate
        if animate:
            img_copy = img_orig.copy()
            #Draw delaunay triangles
            draw_delaunay(img_copy,subdiv,(255,255,255))
            cv2.imshow(win_delaunary,img_copy)
            cv2.waitKey(100)

    #Draw delaunary triangles
    draw_delaunay(img,subdiv,(255,255,255))

    #Draw points
    for p in points:
        draw_point(img,p,(0,0,255))

    #Allocate space for Voroni Diagram
    img_voronoi = np.zeros(img.shape,dtype = img.dtype)

    #Draw Voonoi diagram
    draw_voronoi(img_voronoi,subdiv)

    #Show results
    cv2.imshow(win_delaunary,img)
    cv2.imshow(win_voronoi,img_voronoi)
    cv2.waitKey(0)