OpenCV - 找不到指定扩展名的编码器 [英] OpenCV - could not find encoder for the specified extension

问题描述

这里是我使用的代码转换* IplImage到jpg：

  IplImage * fIplImageHeader; 
 fIplImageHeader = cvCreateImageHeader（cvSize（160，120），8，3）; 
 fIplImageHeader-> imageData =（char *）memblock; 
 
 vector< int> p; 
 p.push_back（CV_IMWRITE_JPEG_QUALITY）; 
 p.push_back（10）; 
矢量< unsigned char> f 
 cv :: imencode（JPEG，fIplImageHeader，buf，p）; 
 
 cvReleaseImageHeader（& fIplImageHeader）; 
  

但我收到此错误：

  OpenCV错误：未指定的错误（找不到指定的扩展名的编码器）在imencode，文件/build/buildd/opencv-2.1.0/src/highgui/loadsave.cpp，行409 
  

终止在调用'cv :: Exception'的实例后调用
what /build/buildd/opencv-2.1.0/src/highgui/loadsave.cpp:409：错误：（-2）无法在函数imencode中找到指定扩展的编码器

为什么呢？我安装了OpenCV 2.1。这个工作很明显jpg编码器必须在那里：

  cvSaveImage（/ home / richard / im.jpg，fIplImageHeader） ; 
  

解决方案

我想出了这一点。这个工程：

  cv :: imencode（。jpg，fIplImageHeader，buf，p）; 
  

他们应该在文档中提到在扩展之前应该有一个句号。 >

Here is my code I am using to convert *IplImage to jpg:

IplImage* fIplImageHeader;
fIplImageHeader = cvCreateImageHeader(cvSize(160, 120), 8, 3);
fIplImageHeader->imageData = (char*) memblock;

vector<int> p;
p.push_back(CV_IMWRITE_JPEG_QUALITY);
p.push_back(10);
vector<unsigned char> buf;
cv::imencode("JPEG", fIplImageHeader, buf, p);

cvReleaseImageHeader(&fIplImageHeader);

But I am getting this error:

OpenCV Error: Unspecified error (could not find encoder for the specified extension) in imencode, file /build/buildd/opencv-2.1.0/src/highgui/loadsave.cpp, line 409

terminate called after throwing an instance of 'cv::Exception' what(): /build/buildd/opencv-2.1.0/src/highgui/loadsave.cpp:409: error: (-2) could not find encoder for the specified extension in function imencode

Why is that? I have OpenCV 2.1 installed. And this works so obviously jpg encoder must be there:

cvSaveImage("/home/richard/im.jpg", fIplImageHeader);

解决方案

Ok. I've figured this out. This works:

cv::imencode(".jpg", fIplImageHeader, buf, p);

They should mention it somewhere in the documentation that there should be a full stop before extension.

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