python 與 C++ dlib人臉檢測結果對比，供大家參考，具體內容如下

說明：

由于項目需求發現Linux下c++使用dlib進行人臉檢測和python使用dlib檢測，得到的結果出入比較大，于是寫了測試用例，發現影響結果的原因有但不限于：

1.dlib版本不同（影響不大，幾個像素的差別）
2.dlib 人臉檢測中detector()第二個參數的設置測試結果如下：

python

PDlib.py：

# -*- coding: utf-8 -*-import sysimport cv2 import dlibfrom skimage import iodetector = dlib.get_frontal_face_detector()win = dlib.image_window()for f in sys.argv[1:]:   img = io.imread(f)  dets = detector(img,1) #使用detector進行人臉檢測  for i, d in enumerate(dets):    x = d.left()    y = d.top()    w = d.right()    h = d.bottom()       cv2.rectangle(img, (x, y), (w, h), (0, 255, 0))    print("({},{},{},{})".format( x, y, (w-x), (h-y)))  win.set_image(img)  io.imsave('./P_Dlib_test.jpg',img)  #等待點擊  dlib.hit_enter_to_continue()

C++

CDlib.cpp：

#include <dlib/image_processing/frontal_face_detector.h>#include <dlib/opencv.h>#include "opencv2/opencv.hpp"#include <iostream>using namespace dlib;using namespace std;cv::Rect Detect(cv::Mat im){  cv::Rect R;  frontal_face_detector detector = get_frontal_face_detector();  array2d<bgr_pixel> img;   assign_image(img, cv_image<uchar>(im));  std::vector<rectangle> dets = detector(img);//檢測人臉  //查找最大臉  if (dets.size() != 0)  {    int Max = 0;    int area = 0;    for (unsigned long t = 0; t < dets.size(); ++t)    {            if (area < dets[t].width()*dets[t].height())      {        area = dets[t].width()*dets[t].height();        Max = t;      }    }    R.x = dets[Max].left();    R.y = dets[Max].top();    R.width = dets[Max].width();    R.height = dets[Max].height();    cout<<"("<<R.x<<","<<R.y<<","<<R.width<<","<<R.height<<")"<<endl;  }  return R;}int main(int argc, char** argv){  if (argc != 2) {    fprintf(stderr, "請輸入正確參數/n");    return 1;  }    string path = argv[1];  try  {        cv::Mat src, dec;    src = cv::imread(path);    src.copyTo(dec);    cv::cvtColor(dec, dec, CV_BGR2GRAY);    cv::Rect box;    box = Detect(dec);    cv::rectangle(src, box, cv::Scalar(0, 0, 255), 1, 1, 0);        cv::imshow("frame", src);    cv::imwrite("./C_Dlib_test.jpg", src);    cv::waitKey(0);//等待建入   }  catch (exception& e)  {    cout << e.what() << endl;  }} 

項目編譯及運行

python

運行腳本 python PDlib.py G:/DlibTest/data/bush.jpg

C++