opencv bug? cvExtractSurf fails with Non-positive width or height exception (opencv 2.1.0)

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在使用OpenCV 2.1.0版本时，遇到cvExtractSurf函数抛出'Non-positive width or height'异常。详细探讨了该异常产生的原因及可能的解决方案，帮助开发者解决图像处理过程中的问题。

在使用cvExtractSurf提取特征出现

OpenCV Error : Incorrect size of input array ( Non - positive width or height ) in cvCreateMatHeader , file / build / buildd / opencv - 2.1 . 0 / src / cxcore / cxarray . cpp , line 113

terminate called after throwing an instance of 'cv::Exception'

what (): / build / buildd / opencv - 2.1 . 0 / src / cxcore / cxarray . cpp : 113 : error : (- 201 ) Non - positive width or height in function cvCreateMatHeader

上网搜了很多，是opencv的BUG吗？

Looks like someone has already created a bug report and found some fixes for this:

源出处：http://opencv-users.1802565.n2.nabble.com/cvExtractSurf-fails-with-Non-positive-width-or-height-exception-opencv-2-1-0-td4963615.html

引用源内容：


  
   Hello, 
   

   

   I use opencv 2.1.0-1 on archlinux (i386). I'm not sure if I don't 
   

   correctly use the API, if it is an archlinux package problem of if it 
   

   is a opencv bug. Thank you for your help 
   

   

   This is the output of my program: 
   

   

   ./a.out 
   

   Filesize: 13x29 
   

   OpenCV Error: Incorrect size of input array (Non-positive width or 
   

   height) in cvCreateMatHeader, file 
   

   /build/src/OpenCV-2.1.0/src/cxcore/cxarray.cpp, line 113 
   

   terminate called after throwing an instance of 'cv::Exception' 
   

     what():  /build/src/OpenCV-2.1.0/src/cxcore/cxarray.cpp:113: error: 
   

   (-201) Non-positive width or height in function cvCreateMatHeader 
   

   

   Aborted 
   

   

   And here is the source code: 
   

   

   #include <cv.h> 
   

   #include <highgui.h> 
   

   #include <stdio.h> 
   

   

   int main(int argc, char** argv) 
   

   { 
   

       IplImage* image = cvLoadImage( "image.png", CV_LOAD_IMAGE_GRAYSCALE ); 
   

       if(  !image ) 
   

       { 
   

           fprintf( stderr, "Can not load image.png "); 
   

           exit(-1); 
   

       } 
   

   

       CvMemStorage* storage = cvCreateMemStorage(0); 
   

       CvSeq *imageKeypoints = 0, *imageDescriptors = 0; 
   

       CvSURFParams params = cvSURFParams(500, 1); 
   

       CvSize s = cvGetSize(image); 
   

       printf("Filesize: %dx%d\n", s.width, s.height); 
   

       cvExtractSURF( image, 0, &imageKeypoints, &imageDescriptors, 
   

   storage, params ); 
   

       printf("Object Descriptors: %d\n", imageDescriptors->total); 
   

   

       return 0; 
   

   }

I am having the same problem with both OpenCV 2.0.0 and 2.1.0 in Visual Studio 2008.  Debug/release libraries were built from source.  I compiled the sample code found in opencv/sample/c/find_obj.cpp and it works great with the images provided, but when I supply my own images I get mixed results.  When I input a white image (i.e. no features can be extracted) it produces this error.  When I input an image composed of noise it works great.  I ran the VS debugger and the call stack shows: 
cxcore200.dll!cv::error(const cv::Exception & exc={...})  Line 194 + 

cxcore200.dll!cv::flann::Index::knnSearch(const cv::Mat & queries={...}, cv::Mat & indices={...}, cv::Mat & dists={...}, int knn=2, const cv::flann::SearchParams & searchParams={...})  Line 135 + 
  
Project.exe!flannFindPairs(const CvSeq * __formal=0x00401b1a, const CvSeq * objectDescriptors=0x00cf57d0, const CvSeq * __formal=0x00401b1a, const CvSeq * imageDescriptors=0x00cfb2e8, std::vector<int,std::allocator<int> > & ptpairs=[...]()) 

Project.exe!locatePlanarObject(const CvSeq * objectKeypoints=, const CvSeq * objectDescriptors=, const CvSeq * imageKeypoints=, const CvSeq * imageDescriptors=, const CvPoint * src_corners=, CvPoint * dst_corners=)  Line 170 

So I'm guessing it's something in cv::flann::Index::knnSearch(...) 

As an alternative OpenSURF seems to work (it works well with a webcam image source).  http://www.chrisevansdev.com/computer-vision-opensurf.html

-Paul Filitchkin

--- In [hidden email] , Tristram Gr?bener <tristramg@...> wrote:

>
> Hello ,
>
> I use opencv 2.1 . 0 - 1 on archlinux ( i386 ). I 'm not sure if I don' t
> correctly use the API , if it is an archlinux package problem of if it
> is a opencv bug . Thank you for your help
>
> This is the output of my program :
>
> ./ a . out
> Filesize : 13x29
> OpenCV Error : Incorrect size of input array ( Non - positive width or
> height ) in cvCreateMatHeader , file
> /build/ src / OpenCV - 2.1 . 0 / src / cxcore / cxarray . cpp , line 113
> terminate called after throwing an instance of 'cv::Exception'
> what (): / build / src / OpenCV - 2.1 . 0 / src / cxcore / cxarray . cpp : 113 : error :
> (- 201 ) Non - positive width or height in function cvCreateMatHeader
>
> Aborted
>
> And here is the source code :
>
> #include <cv.h>
> #include <highgui.h>
> #include <stdio.h>
>
> int main ( int argc , char ** argv )
> {
> IplImage * image = cvLoadImage ( "image.png" , CV_LOAD_IMAGE_GRAYSCALE );
> if ( ! image )
> {
> fprintf ( stderr , "Can not load image.png " );
> exit (- 1 );
> }
>
> CvMemStorage * storage = cvCreateMemStorage ( 0 );
> CvSeq * imageKeypoints = 0 , * imageDescriptors = 0 ;
> CvSURFParams params = cvSURFParams ( 500 , 1 );
> CvSize s = cvGetSize ( image );
> printf ( "Filesize: %dx%d\n" , s . width , s . height );
> cvExtractSURF ( image , 0 , & imageKeypoints , & imageDescriptors ,
> storage , params );
> printf ( "Object Descriptors: %d\n" , imageDescriptors -> total );
>
> return 0 ;
> }
>

... [ show rest of quote ]

In reply to this post by Tristram Gr ? bener

Looks like someone has already created a bug report and found some fixes for this :
https://code.ros.org/trac/opencv/ticket/68
- Paul Filitchkin

--- In [hidden email] , Tristram Gr ? bener < tristramg@ ...> wrote :

> > Hello , > > I use opencv 2.1 . 0 - 1 on archlinux ( i386 ). I 'm not sure if I don' t > correctly use the API , if it is an archlinux package problem of if it > is a opencv bug . Thank you for your help > > This is the output of my program : > > ./ a . out > Filesize : 13x29 > OpenCV Error : Incorrect size of input array ( Non - positive width or > height ) in cvCreateMatHeader , file > /build/ src / OpenCV - 2.1 . 0 / src / cxcore / cxarray . cpp , line 113 > terminate called after throwing an instance of 'cv::Exception' > what (): / build / src / OpenCV - 2.1 . 0 / src / cxcore / cxarray . cpp : 113 : error : > (- 201 ) Non - positive width or height in function cvCreateMatHeader > > Aborted > > And here is the source code : > > #include <cv.h> > #include <highgui.h> > #include <stdio.h> > > int main ( int argc , char ** argv ) > { > IplImage * image = cvLoadImage ( "image.png" , CV_LOAD_IMAGE_GRAYSCALE ); > if ( ! image ) > { > fprintf ( stderr , "Can not load image.png " ); > exit (- 1 ); > } > > CvMemStorage * storage = cvCreateMemStorage ( 0 ); > CvSeq * imageKeypoints = 0 , * imageDescriptors = 0 ; > CvSURFParams params = cvSURFParams ( 500 , 1 ); > CvSize s = cvGetSize ( image ); > printf ( "Filesize: %dx%d\n" , s . width , s . height ); > cvExtractSURF ( image , 0 , & imageKeypoints , & imageDescriptors , > storage , params ); > printf ( "Object Descriptors: %d\n" , imageDescriptors -> total ); > > return 0 ; > } >

... [ show rest of quote ]