在OpenCV中更改图像的dpi [英] Change dpi of an image in OpenCV

问题描述

当我在OpenCv中打开图像(可能为300 dpi，72 dpi等)时，图像的dpi自动更改为96 dpi.我想改变这个dpi.请帮忙.预先感谢...

When I open an image in OpenCv (which may be of 300 dpi, 72 dpi etc.), the dpi of the image is automatically changed to 96 dpi. I want to variate this dpi. Please help. Thanks in advance...

#include "stdafx.h"
#include <cv.h>
#include <cxcore.h>
#include <highgui.h>
#include <iostream>
using namespace std;
int _tmain(int argc, _TCHAR* argv[])
{
    IplImage *img1=cvLoadImage("input.jpg");
    cvSaveImage("output.jpg",img1);
    return(0);
}

推荐答案

您需要编辑图像元数据 libexif (c)或 exiv2 (c ++)

You need to edit the image meta data libexif(c) or exiv2 (c++)

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