detect_animeface https://github.com/nagadomi/lbpcascade_animeface

detect_animeface.cpp

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <opencv2\opencv.hpp>
using namespace cv;
using namespace std;

int main(int argc, char* argv[]){
	if (argc < 2){
		cout << "画像の名前を入力してください。";
		return -1;
	}

	Mat srcImage = imread(argv[1]);

	if (!srcImage.data)
	{
		cout << "画像が読み込めませんでした。" << std::endl;
		return -1;
	}

	char *cascade_name = "lbpcascade_animeface.xml";
	auto cascade = CascadeClassifier(cascade_name);
	Mat grayImage;
	cv::cvtColor(srcImage, grayImage, COLOR_BGR2GRAY);

	vector<Rect> faces;
	cascade.detectMultiScale(
		grayImage,
		faces,
		1.1,
		2,
		CV_HAAR_SCALE_IMAGE,
		Size(25, 25)
		);

	for (vector<Rect>::iterator iter = faces.begin(); iter != faces.end(); iter++) {
		rectangle(srcImage, *iter, Scalar(255, 0, 0), 1);
	}

	imshow("result", srcImage);
	imwrite("animeface.png", srcImage);
	cvWaitKey(0);
}