Question

我正在尝试为iOS应用程序实现dlib的面部标志性检测。在dlib的例子中，他们初始化shape_predictor：

// And we also need a shape_predictor.  This is the tool that will predict face
// landmark positions given an image and face bounding box.  Here we are just
// loading the model from the shape_predictor_68_face_landmarks.dat file you gave
// as a command line argument.
    shape_predictor sp;
    deserialize(argv[1]) >> sp;

我正在尝试在Objective-C中做同样的事情并且已经做到了这一点：

NSString *filePath = [[NSBundle mainBundle] pathForResource:@"shape_predictor_68_face_landmarks" ofType:@"dat"];
NSData *myData = [NSData dataWithContentsOfFile:filePath];

执行以下操作会给我一个错误：“接收器类型'dlib :: shape_predictor'不是Objective-C类”

sp = [dlib::shape_predictor deserialize:myData];

Answer 1

假设您已在项目中正确设置dlib库（并包含source.cpp文件），您需要一个.mm文件（Objective-C ++），您可以在其中执行以下操作：

#include <dlib/image_processing/frontal_face_detector.h>
#include <dlib/image_processing/render_face_detections.h>
#include <dlib/image_processing.h>
#include <dlib/opencv.h>
#include <dlib/image_io.h>

然后，您可以加载所需的dlib类，并使用常规C ++语法。这是一个例子：

dlib::frontal_face_detector detector = dlib::get_frontal_face_detector();
dlib::shape_predictor shapePredictor;

NSBundle *mainBundle = [NSBundle mainBundle];
NSString *landmarkdat = [[NSString alloc] initWithFormat:@"%@/%s", mainBundle.bundlePath,"shape_predictor_68_face_landmarks.dat"];
dlib::deserialize(landmarkdat.UTF8String) >> shapePredictor;

注意：在我的项目中，我已将project_predictor_68_face_landmarks.dat添加为Project-＆gt; Target-＆gt; Build Phrases-> gt复制包资源并检查复制按钮。

如何在Objective-C中使用dlib的shape_predictor？

1 个答案: