Question

我正在使用QT为Android设备编程，需要使用openCV从相机中捕获。我已经使用了Qt创建者和链接openCV并使用了相机，但在Qt for android（必需品）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()'
        .
        .
        .

首先我下载最新版本的openCV并构建它然后使用libs。也在

project.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" \ .
...

有必要支持openCV吗？为什么要显示这个错误？

抱歉我的英语。

Answer 1

事实证明.a文件的顺序很重要。按此顺序（改变路径的路径）对我有用：

LIBS += \
    /media/Software/android/OpenCV-2.3.1/libs/armeabi-v7a/libopencv_calib3d.a \
    /media/Software/android/OpenCV-2.3.1/libs/armeabi-v7a/libopencv_flann.a \
    /media/Software/android/OpenCV-2.3.1/libs/armeabi-v7a/libopencv_objdetect.a \
    /media/Software/android/OpenCV-2.3.1/libs/armeabi-v7a/libopencv_contrib.a \
    /media/Software/android/OpenCV-2.3.1/libs/armeabi-v7a/libopencv_video.a \
    /media/Software/android/OpenCV-2.3.1/libs/armeabi-v7a/libopencv_ml.a \
    /media/Software/android/OpenCV-2.3.1/libs/armeabi-v7a/libopencv_legacy.a \
    /media/Software/android/OpenCV-2.3.1/libs/armeabi-v7a/libopencv_highgui.a \
    /media/Software/android/OpenCV-2.3.1/share/OpenCV/3rdparty/libs/armeabi-v7a/liblibjpeg.a \
    /media/Software/android/OpenCV-2.3.1/share/OpenCV/3rdparty/libs/armeabi-v7a/liblibpng.a \
    /media/Software/android/OpenCV-2.3.1/share/OpenCV/3rdparty/libs/armeabi-v7a/liblibtiff.a \
    /media/Software/android/OpenCV-2.3.1/share/OpenCV/3rdparty/libs/armeabi-v7a/liblibjasper.a \
    /media/Software/android/OpenCV-2.3.1/share/OpenCV/3rdparty/libs/armeabi-v7a/libzlib.a \
    /media/Software/android/OpenCV-2.3.1/libs/armeabi-v7a/libopencv_ts.a \
    /media/Software/android/OpenCV-2.3.1/libs/armeabi-v7a/libopencv_imgproc.a \
    /media/Software/android/OpenCV-2.3.1/libs/armeabi-v7a/libopencv_core.a \
    /media/Software/android/OpenCV-2.3.1/libs/armeabi-v7a/libopencv_androidcamera.a \
    /media/Software/android/OpenCV-2.3.1/libs/armeabi-v7a/libopencv_features2d.a

INCLUDEPATH += /media/Software/android/OpenCV-2.3.1/include/opencv/ \
               /media/Software/android/OpenCV-2.3.1/include/

Answer 2

查找并添加libtiff.a，它可能位于opencv第三方库目录中。

使用openCV libs时必须出错

2 个答案: