[VEDA 1기 수강일지] 50일차 - openCV (2) :

수강한 개념

VideoCapture

 

canny

sobel

 

setMouseCallback

 

filter2D

bilateralFilter

 

drawKeyPoints

SiftFeatureDetector

SiftDescriptorExtractor

class SIFT

ㄴdectect

ㄴcompute

 

cd /usr/share/opencv4/haarcascades/

ㄴ학습된 데이터모델 세트

 

class CascadeClassifier

detectMultiScale

 

rpicam-hello --list-cameras

 

컴파일 : g++ [filename].cpp -o [name] $(pkg-config --cflags --libs opencv4)

문제 구현 / 개선방안

#include <opencv2/imgproc.hpp>
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/features2d/features2d.hpp>
#include <opencv2/calib3d/calib3d.hpp>
#include <opencv2/flann/flann.hpp>
#include <opencv2/objdetect.hpp>

using namespace cv;

String face_cascade="/usr/share/opencv4/haarcascades/haarcascade_frontalface_alt.xml";
String eye_cascade="/usr/share/opencv4/haarcascades/haarcascade_eye.xml";
CascadeClassifier face;
CascadeClassifier eye;

void FaceAndEyeDetect(Mat);

int main()
{
    std::string pipeline ="libcamerasrc camera-name=/base/axi/pcie@120000/rp1/i2c@88000/ov5647@36 \
        ! video/x-raw,width=640,height=480,framerate=10/1,format=RGBx ! videoconvert ! videoscale  ! appsink"; //줄바꿈시 \가 없으면 오류 발생
    
    VideoCapture v(pipeline,cv::CAP_GSTREAMER);
    assert(v.isOpened());
    
    bool b1 = face.load(face_cascade);
    bool b2 = eye.load(eye_cascade);
    assert(b1 && b2);
    
    Mat frame;

    while(true)
    {
        v.read(frame);
        FaceAndEyeDetect(frame);
        if((char)waitKey(20)==27) break;
    }

    return 0;
}

void FaceAndEyeDetect(Mat img)
{
    Mat gray;
    cvtColor(img, gray, COLOR_BGR2GRAY);

    std::vector<Rect> face_pos;
    face.detectMultiScale(gray, face_pos, 1.1, 2, 0|CASCADE_SCALE_IMAGE, Size(10, 10));

    for(int i=0; i<face_pos.size(); i++)
        rectangle(img, face_pos[i],Scalar(255,0,0),2);

    for(int i=0; i<face_pos.size(); i++)
    {
        std::vector<Rect> eye_pos;
        Mat roi=gray(face_pos[i]);

        eye.detectMultiScale(roi, eye_pos, 1.1,2,0|CASCADE_SCALE_IMAGE, Size(10, 10));

        for(int j=0; j<eye_pos.size();j++)
        {
            Point center(face_pos[i].x+eye_pos[j].x+eye_pos[j].width*0.5,face_pos[i].y+eye_pos[j].y+eye_pos[j].height*0.5);
            int radius = cvRound((eye_pos[j].width+eye_pos[j].height*0.25));
            circle(img,center,radius,Scalar(0,0,255),2,8,0);
        }
    }

    namedWindow("cascade"); imshow("cascade", img); 
}

기타 사항

 

 

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