我在imwrite上尝试OpenCV Documentation上的示例时,似乎出现了零星的问题。下面的代码在大多数时间运行,但有时会失败并显示异常消息:


#include "stdafx.h"
#include <opencv2/opencv.hpp>
using namespace cv;
using namespace std;
void createAlphaMat(Mat &mat)
{
    CV_Assert(mat.channels() == 4);
    for (int i = 0; i < mat.rows; ++i) {
        for (int j = 0; j < mat.cols; ++j) {
            Vec4b& bgra = mat.at<Vec4b>(i, j);
            bgra[0] = UCHAR_MAX; // Blue
            bgra[1] = saturate_cast<uchar>((float (mat.cols - j)) / ((float)mat.cols) * UCHAR_MAX); // Green
            bgra[2] = saturate_cast<uchar>((float (mat.rows - i)) / ((float)mat.rows) * UCHAR_MAX); // Red
            bgra[3] = saturate_cast<uchar>(0.5 * (bgra[1] + bgra[2])); // Alpha
        }
    }
}
int main(int argv, char **argc)
{
    std::cout << cv::getBuildInformation().c_str() << std::endl;
    // Create mat with alpha channel
    Mat mat(480, 640, CV_8UC4);
    createAlphaMat(mat);
    vector<int> compression_params;
    compression_params.push_back(IMWRITE_PNG_COMPRESSION);
    compression_params.push_back(9);
    try {
        imwrite("alpha.png", mat, compression_params);
    }
    catch (cv::Exception& ex) {
        fprintf(stderr, "Exception converting image to PNG format: %s\n", ex.what());
        return 1;
    }
    fprintf(stdout, "Saved PNG file with alpha data.\n");
    return 0;
}

当我查看imwrite的调用堆栈时,似乎从主函数传递的params变量已损坏(params.size()变为1073741810)

有没有人遇到过同样的问题?

这是我的构建信息:
General configuration for OpenCV 3.1.0
=====================================
  Version control:               unknown

  Platform:
    Host:                        Windows 10.0.10586 AMD64
    CMake:                       3.5.0-rc3
    CMake generator:             Visual Studio 14 2015
    CMake build tool:            C:/Program Files (x86)/MSBuild/14.0/bin/MSBuild.exe
    MSVC:                        1900

  C/C++:
    Built as dynamic libs?:      YES
    C++ Compiler:                C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/cl.exe  (ver 19.0.23918.0)
    C++ flags (Release):         /DWIN32 /D_WINDOWS /W4 /GR /EHa  /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /arch:SSE2 /Oi /fp:fast  /wd4251 /wd4324 /wd4275 /wd4589 /MP4  /MD /O2 /Ob2 /D NDEBUG  /Zi
    C++ flags (Debug):           /DWIN32 /D_WINDOWS /W4 /GR /EHa  /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /arch:SSE2 /Oi /fp:fast  /wd4251 /wd4324 /wd4275 /wd4589 /MP4  /D_DEBUG /MDd /Zi /Ob0 /Od /RTC1
    C Compiler:                  C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/cl.exe
    C flags (Release):           /DWIN32 /D_WINDOWS /W3  /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /arch:SSE2 /Oi /fp:fast    /MP4  /MD /O2 /Ob2 /D NDEBUG  /Zi
    C flags (Debug):             /DWIN32 /D_WINDOWS /W3  /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /arch:SSE2 /Oi /fp:fast    /MP4  /D_DEBUG /MDd /Zi /Ob0 /Od /RTC1
    Linker flags (Release):      /machine:X86  /INCREMENTAL:NO  /debug
    Linker flags (Debug):        /machine:X86  /debug /INCREMENTAL
    Precompiled headers:         YES
    Extra dependencies:          comctl32 gdi32 ole32 setupapi ws2_32 vfw32
    3rdparty dependencies:       zlib libjpeg libwebp libpng libtiff libjasper IlmImf

  OpenCV modules:
    To be built:                 core flann imgproc ml photo video imgcodecs shape videoio highgui objdetect superres ts features2d calib3d stitching videostab
    Disabled:                    world
    Disabled by dependency:      -
    Unavailable:                 cudaarithm cudabgsegm cudacodec cudafeatures2d cudafilters cudaimgproc cudalegacy cudaobjdetect cudaoptflow cudastereo cudawarping cudev java python2 python3 viz

  Windows RT support:            NO

  GUI:
    QT:                          NO
    Win32 UI:                    YES
    OpenGL support:              NO
    VTK support:                 NO

  Media I/O:
    ZLib:                        build (ver 1.2.8)
    JPEG:                        build (ver 90)
    WEBP:                        build (ver 0.3.1)
    PNG:                         build (ver 1.6.19)
    TIFF:                        build (ver 42 - 4.0.2)
    JPEG 2000:                   build (ver 1.900.1)
    OpenEXR:                     build (ver 1.7.1)
    GDAL:                        NO

  Video I/O:
    Video for Windows:           YES
    DC1394 1.x:                  NO
    DC1394 2.x:                  NO
    FFMPEG:                      YES (prebuilt binaries)
      codec:                     YES (ver 56.41.100)
      format:                    YES (ver 56.36.101)
      util:                      YES (ver 54.27.100)
      swscale:                   YES (ver 3.1.101)
      resample:                  NO
      gentoo-style:              YES
    GStreamer:                   NO
    OpenNI:                      NO
    OpenNI PrimeSensor Modules:  NO
    OpenNI2:                     NO
    PvAPI:                       NO
    GigEVisionSDK:               NO
    DirectShow:                  YES
    Media Foundation:            NO
    XIMEA:                       NO
    Intel PerC:                  NO

  Parallel framework:            Concurrency

  Other third-party libraries:
    Use IPP:                     9.0.1 [9.0.1]
         at:                     E:/Dev/opencv/sources/3rdparty/ippicv/unpack/ippicv_win
    Use IPP Async:               NO
    Use Eigen:                   NO
    Use Cuda:                    NO
    Use OpenCL:                  YES
    Use custom HAL:              NO

  OpenCL:
    Version:                     dynamic
    Include path:                E:/Dev/opencv/sources/3rdparty/include/opencl/1.2
    Use AMDFFT:                  NO
    Use AMDBLAS:                 NO

  Python 2:
    Interpreter:                 NO

  Python 3:
    Interpreter:                 C:/Python34/python.exe (ver 3.4.3)

  Python (for build):            C:/Python34/python.exe

  Java:
    ant:                         NO
    JNI:                         NO
    Java wrappers:               NO
    Java tests:                  NO

  Matlab:
    mex:                         C:/Program Files/MATLAB/R2016a/bin/mex.bat
    Compiler/generator:          Not working (bindings will not be generated)

  Documentation:
    Doxygen:                     NO
    PlantUML:                    NO

  Tests and samples:
    Tests:                       YES
    Performance tests:           YES
    C/C++ Examples:              NO

  Install path:                  E:/Dev/opencv/x86_v140_xp/install

  cvconfig.h is in:              E:/Dev/opencv/x86_v140_xp
-----------------------------------------------------------------

最佳答案

这只是添加到Micka的评论中(谢谢!),以及我 future 的自我……

我的应用程序失败的原因是由于在调试环境中混合了版本库。我是Visual Studio 2015的“属性”表,它不允许我为不同的构 build 置添加不同的库。

但是,我后来得知,可以使用文本编辑器编辑属性表。通过添加Condition属性,我可以分离包含和库路径以及文件。

以下是其外观示例:

<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <ImportGroup Label="PropertySheets" />
  <PropertyGroup Label="UserMacros" />
  <PropertyGroup>
    <IncludePath>$(VC_IncludePath);$(WindowsSDK_IncludePath);$(WindowsSdk_71A_IncludePath)</IncludePath>
    <LibraryPath>$(LibraryPath)</LibraryPath>
    <_PropertySheetDisplayName>OCV</_PropertySheetDisplayName>
    <ExcludePath>$(VC_IncludePath);$(MSBuild_ExecutablePath);$(VC_LibraryPath_x86);</ExcludePath>
  </PropertyGroup>
    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
        <!-- debug config -->
        <ClCompile>
          <AdditionalIncludeDirectories>E:\Dev\opencv\build\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
          <PreprocessorDefinitions>__STDC_CONSTANT_MACROS;UNICODE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
        </ClCompile>
        <Link>
          <AdditionalLibraryDirectories>E:\Dev\opencv\x86_v140_xp\lib\Debug;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
          <AdditionalDependencies>opencv_calib3d310d.lib;opencv_core310d.lib;opencv_features2d310d.lib;opencv_flann310d.lib;opencv_highgui310d.lib;opencv_imgcodecs310d.lib;opencv_imgproc310d.lib;opencv_ml310d.lib;opencv_objdetect310d.lib;opencv_photo310d.lib;opencv_shape310d.lib;opencv_stitching310d.lib;opencv_superres310d.lib;opencv_ts310d.lib;opencv_video310d.lib;opencv_videoio310d.lib;opencv_videostab310d.lib;%(AdditionalDependencies)</AdditionalDependencies>
        </Link>
    </ItemDefinitionGroup>
    <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
        <!-- release config -->
        <ClCompile>
          <AdditionalIncludeDirectories>E:\Dev\opencv\build\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
          <PreprocessorDefinitions>__STDC_CONSTANT_MACROS;UNICODE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
        </ClCompile>
        <Link>
          <AdditionalLibraryDirectories>E:\Dev\opencv\x86_v140_xp\lib\Release;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
          <AdditionalDependencies>opencv_calib3d310.lib;opencv_core310.lib;opencv_features2d310.lib;opencv_flann310.lib;opencv_highgui310.lib;opencv_imgcodecs310.lib;opencv_imgproc310.lib;opencv_ml310.lib;opencv_objdetect310.lib;opencv_photo310.lib;opencv_shape310.lib;opencv_stitching310.lib;opencv_superres310.lib;opencv_ts310.lib;opencv_video310.lib;opencv_videoio310.lib;opencv_videostab310.lib;%(AdditionalDependencies)</AdditionalDependencies>
        </Link>
    </ItemDefinitionGroup>
  <ItemGroup />
</Project>

对于x64版本,您也可以将Win32替换为x64

09-10 05:23