Diary of Life

#include <opencv2/opencv.hpp>

using namespace cv;

#include <iostream>

using namespace std;

#define STR_WINDOW "Window"

void mouseEvent(int evt, int x, int y, int flags, void *param){

Mat *img = (Mat *)param;

if ( evt == CV_EVENT_LBUTTONDOWN ){

printf("(%04d, %04d) : %03d, %03d, %03d\n", x, y,

(int)(*img).at<Vec3b>(y,x)[0],

(int)(*img).at<Vec3b>(y,x)[1],

(int)(*img).at<Vec3b>(y,x)[2]);

}

}

int main(){

Mat image = imread( your image path );

if ( image.empty() ){

cout << "Error loading the image" <<endl;

return -1;

}

namedWindow(STR_WINDOW, 1);

setMouseCallback(STR_WINDOW, mouseEvent, &image);

imshow(STR_WINDOW, image);

waitKey(0);

return 0;

}

<< result >>

• and
• as
• assert
• break
• class
• continue
• def
• del
• elif
• else
• except
• exec
• finally
• for
  
• from
• global
• if
• import
• in
• is
  
• lambda
• Not
• or
• pass
• print
• raise
• return
• try
• while
• with
• yield

• Class names start with an uppercase letter. All other identifiers start with a lowercase letter.
• Starting an identifier with a single leading underscore indicates that the identifier is private.
• Starting an identifier with two leading underscores indicates a strongly private identifier.
• If the identifier also ends with two trailing underscores, the identifier is a language-defined special name.
  

#include <stdio.h>

#include <direct.h>    // chdir

#ifndef _MAX_PATH

#define _MAX_PATH    260

#endif // _MAX_PATH

int main(){

char strBuffer[_MAX_PATH]={0,};

char strChangeDir[_MAX_PATH]={"..\\"};

char *pStrBuffer = NULL;

pStrBuffer = _getcwd(strBuffer, _MAX_PATH);

printf("Beginning path : %s\n", strBuffer);

int nResult = _chdir(strChangeDir);

if ( nResult == 0 ){

printf( "Successed\n" );

pStrBuffer = _getcwd(strBuffer, _MAX_PATH);

printf( "Ending path : %s\n", strBuffer);

} else {

perror( "Failed" );

}

return 0;

}

< 테스트 결과 (Result of test) >

#include <stdio.h>

#pragma warning(disable: 4996)

int main(){

FILE *pFile;

pFile = fopen("MakeAFile.txt", "w");

if ( pFile != NULL ){

fputs("fopen example", pFile);

fclose(pFile);

}

return 0;

}

#include <opencv\cv.h>

#include <opencv\highgui.h>

using namespace cv;

using namespace std;

int main(){

// 이미지 불러오기 (read image).

Mat image = imread("image.jpg");

// 에러 처리 (error).

if ( !image.data ) {

return -1;

}

// 관심영역 설정 (set ROI (X, Y, W, H)).

Rect rect(100, 30, 150, 300);

// 관심영역 자르기 (Crop ROI).

Mat subImage = image(rect);

// show

imshow("image", subImage);

waitKey(0);

return 0;

}

#include <opencv2/opencv.hpp>

using namespace cv;

int main(int argc, char **argv){

char *imageName = argv[1];

Mat image;

image = imread(imageName, 1);    // 이미지 불러오기.

// 에러 처리.

if ( argc!= 2 || !image.data ){

printf(" No image data \n ");

return -1;

}

// 불러온 이미지와 구분하기 위하여 흑백 이미지로 변환.

Mat grayImage;

cvtColor( image, grayImage, COLOR_BGR2GRAY );

// 파일명 "GrayImage.jpg"로 저장.

imwrite( "GrayImage.jpg", grayImage );

return 0;

}

이와같이 사용하시면 이미지 불러오기와 저장을 할 수 있습니다.