【发布时间】：2012-01-15 08:49:08
【问题描述】：
我在 QT 中为 android 设备编程，需要使用 openCV 从相机捕获。我已经使用了 Qt creator 并链接了 openCV 并使用了相机，但是在 Qt for android (necessitas) 中构建程序时，显示此错误：
C:/OpenCV2.3.1/libs/armeabi-v7a/libopencv_highgui.a(cap_images.o): In function `CvCapture_Images::close()':
cap_images.cpp:(.text._ZN16CvCapture_Images5closeEv+0x1c): undefined reference to `cvReleaseImage'
C:/OpenCV2.3.1/libs/armeabi-v7a/libopencv_highgui.a(cap_images.o): In function `CvCapture_Images::grabFrame()':
cap_images.cpp:(.text._ZN16CvCapture_Images9grabFrameEv+0x1e): undefined reference to `cvReleaseImage'
C:/OpenCV2.3.1/libs/armeabi-v7a/libopencv_highgui.a(cap_ffmpeg.o): In function `CvCapture_FFMPEG_proxy::retrieveFrame(int)':
cap_ffmpeg.cpp:(.text._ZN22CvCapture_FFMPEG_proxy13retrieveFrameEi[CvCapture_FFMPEG_proxy::retrieveFrame(int)]+0x50): undefined reference to `cvInitImageHeader'
cap_ffmpeg.cpp:(.text._ZN22CvCapture_FFMPEG_proxy13retrieveFrameEi[CvCapture_FFMPEG_proxy::retrieveFrame(int)]+0x5a): undefined reference to `cvSetData'
C:/OpenCV2.3.1/libs/armeabi-v7a/libopencv_highgui.a(cap_ffmpeg.o): In function `CvVideoWriter_FFMPEG_proxy::writeFrame(_IplImage const*)':
cap_ffmpeg.cpp:(.text._ZN26CvVideoWriter_FFMPEG_proxy10writeFrameEPK9_IplImage[CvVideoWriter_FFMPEG_proxy::writeFrame(_IplImage const*)]+0x5e): undefined reference to `cv::Exception::Exception(int, std::string const&, std::string const&, std::string const&, int)'
cap_ffmpeg.cpp:(.text._ZN26CvVideoWriter_FFMPEG_proxy10writeFrameEPK9_IplImage[CvVideoWriter_FFMPEG_proxy::writeFrame(_IplImage const*)]+0x64): undefined reference to `cv::error(cv::Exception const&)'
cap_ffmpeg.cpp:(.text._ZN26CvVideoWriter_FFMPEG_proxy10writeFrameEPK9_IplImage[CvVideoWriter_FFMPEG_proxy::writeFrame(_IplImage const*)]+0x6a): undefined reference to `cv::Exception::~Exception()'
cap_ffmpeg.cpp:(.text._ZN26CvVideoWriter_FFMPEG_proxy10writeFrameEPK9_IplImage[CvVideoWriter_FFMPEG_proxy::writeFrame(_IplImage const*)]+0x11c): undefined reference to `cv::Exception::~Exception()'
C:/OpenCV2.3.1/libs/armeabi-v7a/libopencv_highgui.a(grfmt_tiff.o): In function `cv::TiffEncoder::newEncoder() const':
grfmt_tiff.cpp:(.text._ZNK2cv11TiffEncoder10newEncoderEv+0x16): undefined reference to `cv::fastMalloc(unsigned int)'
C:/OpenCV2.3.1/libs/armeabi-v7a/libopencv_highgui.a(grfmt_tiff.o): In function `cv::TiffDecoder::newDecoder() const':
grfmt_tiff.cpp:(.text._ZNK2cv11TiffDecoder10newDecoderEv+0x16): undefined reference to `cv::fastMalloc(unsigned int)'
C:/OpenCV2.3.1/libs/armeabi-v7a/libopencv_highgui.a(grfmt_tiff.o): In function `cv::TiffDecoder::~TiffDecoder()':
grfmt_tiff.cpp:(.text._ZN2cv11TiffDecoderD1Ev+0x48): undefined reference to `cv::fastFree(void*)'
grfmt_tiff.cpp:(.text._ZN2cv11TiffDecoderD1Ev+0x6e): undefined reference to `cv::Mat::deallocate()'
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首先我下载最新版本的 openCV 并构建它，然后使用库。也在
项目.pro
添加以下行：
INCLUDEPATH += "C:\OpenCV2.3.1\include\opencv"
LIBS +="C:/OpenCV2.3.1/libs/armeabi-v7a/libopencv_androidcamera.a" \
"C:/OpenCV2.3.1/libs/armeabi-v7a/libopencv_calib3d.a" \
"C:/OpenCV2.3.1/libs/armeabi-v7a/libopencv_calib3d_pch_dephelp.a" \ .
...
necessitas 可以支持 openCV 吗？为什么显示这个错误？
对不起我的英语。
【问题讨论】：