Question

我试图将dlib正面探测器中的五级级联分成三级（前视，前视但向左旋转，前视但向右旋转）

Evgeniy建议在C ++中拆分检测器。我不熟悉C ++。当我查看frontal_face_detector.h时，get_serialized_frontal_faces返回base64编码对象。

我学会了如何将现有探测器保存到.svm文件中：

#include <dlib/image_processing/frontal_face_detector.h>
#include <iostream>

using namespace dlib;
using namespace std;

int main()
{   
    frontal_face_detector detector = get_frontal_face_detector(); 

    dlib::serialize("new_detector.svm") << detector;  

    std::cout<<"End of the Program"<<endl;
    return 0;   
}

那么如何拆分级联并将新探测器保存到.svm文件？

通过将金字塔等级从6降低到6，检测器性能也会提高。 frontal_face_detector.h中的较低值？

Answer 1

请阅读object detector documentation，您会找到解释。下面是将探测器分成几部分，重建原始图像并限制金字塔等级的代码：

#include <dlib/image_processing/frontal_face_detector.h>
#include <iostream>
#include <string>

using namespace dlib;
using namespace std;

int main()
{   
    frontal_face_detector detector = get_frontal_face_detector(); 

    dlib::serialize("current.svm") << detector;

    std::vector<frontal_face_detector> parts;
    // Split into parts and serialize to disk
    for (unsigned long i = 0; i < detector.num_detectors(); ++i)
    {
        dlib::frontal_face_detector part(detector.get_scanner(), detector.get_overlap_tester(), detector.get_w(i));
        dlib::serialize("part" + std::to_string(i) + ".svm") << part;
        parts.push_back(part);
    }

    // Reconstruct original detector
    frontal_face_detector reconstructed(parts);
    dlib::serialize("reconstructed.svm") << reconstructed;

    // Create detector that will work only on one level of pyramid
    typedef dlib::scan_fhog_pyramid<dlib::pyramid_down<6> > image_scanner_type;
    image_scanner_type scanner;
    scanner.copy_configuration(detector.get_scanner());
    scanner.set_max_pyramid_levels(1); //try setting to 2, 3...
    frontal_face_detector one_level_detector = dlib::object_detector<image_scanner_type>(scanner, detector.get_overlap_tester(), detector.get_w());

    std::cout<<"End of the Program"<<endl;
    return 0;   
}

并且否，将金字塔等级从＆lt; 6＆gt;改变。任何其他值都没有多大帮助，因为 6 不是金字塔等级的限制，而是它在金字塔中的比例：

6 = 5/6

5 = 4/5

...

如何在dlib正面检测器中分割级联水平？

1 个答案: