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。