转换函数中Mat的内存泄漏

Question

我在管理函数中的内存方面遇到了一些麻烦。Valgrid说我在转换函数之后有内存泄漏。会不会是因为数据没有正确发布?我试过使用温度指针，但我的程序要么崩溃，要么不能正常工作。以前有人遇到过这个问题吗?

this->images.push_back(new cv::Mat());                                                          //ID
cv::threshold(*this->images[MASK], *this->images[ID], 0.0, 1.0, cv::THRESH_BINARY);
this->images[ID]->convertTo(*this->images[ID], CV_32SC1);

这是valgrid的输出:

==5663== 64,339,996 bytes in 1 blocks are possibly lost in loss record 380 of 380
==5663==    at 0x4C2AB80: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==5663==    by 0x4E95117: cv::fastMalloc(unsigned long) (in /usr/local/lib/libopencv_core.so.2.4.9)
==5663==    by 0x4F31F38: cv::Mat::create(int, int const*, int) (in /usr/local/lib/libopencv_core.so.2.4.9)
==5663==    by 0x4F39CF9: cv::_OutputArray::create(cv::Size_<int>, int, int, bool, int) const (in /usr/local/lib/libopencv_core.so.2.4.9)
==5663==    by 0x4EB9373: cv::Mat::convertTo(cv::_OutputArray const&, int, double, double) const (in /usr/local/lib/libopencv_core.so.2.4.9)
==5663==    by 0x40D168: DataFrame::init() (DataFrame.cpp:68)
==5663==    by 0x40C943: DataFrame::DataFrame(char const*, LeafClassifier*) (DataFrame.cpp:31)
==5663==    by 0x414A19: DataHandler::loadFrame() (DataHandler.cpp:68)
==5663==    by 0x406680: main (main.cpp:58)

Answer 1

请不要在vector(或其他任何地方)存储指向Mat的指针。

这些东西在内部被重新计算，就像智能指针一样，你通过存储/复制指针来破坏它(一个指向智能指针的指针向量听起来很傻，不是吗?)

使用普通的vector<Mat>，每项额外交换约56字节，今晚睡个好觉;)