#include <iostream>

#include <opencv2/core/core.hpp>

#include <opencv2/imgproc/imgproc.hpp>

#include <opencv2/highgui/highgui.hpp>

using namespace cv;

int main()

{

Mat src_img = imread("lena.tif", 1);

if (!src_img.data) return -1; 

Mat dst_img1;

Mat dst_img2(src_img.rows * 0.5, src_img.cols * 2.0, src_img.type ());

// INTER_LINER (이중 선형 보간)의 크기 변경

resize (src_img, dst_img1, cv :: Size (), 0.5, 0.5);

// INTER_CUBIC (바이 큐빅 보간)의 크기 변경

resize (src_img, dst_img2, dst_img2.size(), INTER_CUBIC);

namedWindow ( "resize image1",CV_WINDOW_AUTOSIZE | CV_WINDOW_FREERATIO);

namedWindow ( "resize image2",CV_WINDOW_AUTOSIZE | CV_WINDOW_FREERATIO);

imshow ( "resize image1",dst_img1);

imshow ( "resize image2",dst_img2);

waitKey(0);

return 0;

}

#include <iostream>

#include <opencv2/core/core.hpp>

#include <opencv2/imgproc/imgproc.hpp>

#include <opencv2/highgui/highgui.hpp>

using namespace cv;

int main()

{

Mat bgr_img = imread ( "lena.tif", 1);

if (!bgr_img.data) return -1; 

Mat dst_img;

// BGR -> HSV

cvtColor (bgr_img, dst_img, CV_BGR2HSV);

imshow("BGR -> HSV",dst_img);

// BGR -> Lab

cvtColor (bgr_img, dst_img, CV_BGR2Lab);

imshow("BGR -> Lab",dst_img);

// BGR -> YCrCb

cvtColor (bgr_img, dst_img, CV_BGR2YCrCb);

imshow("BGR -> YCrCb",dst_img);

  // BGR -> XYZ

cvtColor(bgr_img, dst_img, CV_BGR2XYZ);

imshow("BGR -> XYZ",dst_img);

waitKey(0);

return 0;

}

#include <iostream>

#include <opencv2/core/core.hpp>

#include <opencv2/highgui/highgui.hpp>

using namespace cv;

int main()

{

// 초기화시에 칠

Mat red_img(Size(640, 480), CV_8UC3, Scalar(0,0,255));

Mat white_img(Size(640, 480), CV_8UC3, Scalar::all(255));

Mat black_img = Mat::zeros(Size (640, 480), CV_8UC3); 

// 초기화 후 채우기

Mat green_img = red_img.clone();

green_img = Scalar(0,255,0);

namedWindow("red image",CV_WINDOW_AUTOSIZE | CV_WINDOW_FREERATIO);

namedWindow("white image",CV_WINDOW_AUTOSIZE | CV_WINDOW_FREERATIO);

namedWindow("black image",CV_WINDOW_AUTOSIZE | CV_WINDOW_FREERATIO);

namedWindow("green image",CV_WINDOW_AUTOSIZE | CV_WINDOW_FREERATIO);

imshow("red image",red_img);

imshow("white image",white_img);

imshow("black image",black_img);

imshow("green image",green_img);

waitKey(0);

return 0;

}