如何将[QT]QSharedMemory读写cv::Mat实现为？

1.写入共享内存 void WriteMat(const char* section,const cv::Mat &img) { QSharedMemory *mem = new QSharedMemory(); mem->setKey(section); int size = img.cols * img.rows *img.channels(); //cols + rows + channels +data //if exist return false mem->create(size + 5); //attach memory if(!mem->isAttached()) mem->attach(); mem->lock(); //m_memory ptr char * data = (char * )mem->data(); //high data[0] = (char)((img.cols >> 8) & 0xFF); //low data[1] = (char)(img.cols & 0xFF); //high data[2] = (char)((img.rows >> 8) & 0xFF); //low data[3] = (char)(img.rows & 0xFF); //channel data[4]=img.channels(); //image data memcpy((void*)(data +5), (void*)img.data, size); mem->unlock(); } 2.从共享内存中读取 cv::Mat ReadMat(const char *section) { QSharedMemory *mem =new QSharedMemory(); mem->setKey(section); if(!mem->attach(QSharedMemory::ReadWrite)) return cv::Mat(); int size = mem->size(); if(size == 0) return cv::Mat(); int rows, cols, channels; mem->lock(); const char *data = (const char *)mem->constData(); cols = (data[0]<<8) | (data[1] &0xFF); rows = (data[2]<<8) | (data[3] &0xFF); channels = data[4]; cv::Mat img(rows,cols,CV_MAKETYPE(8U,channels),(void*)(data + 5)); mem->unlock(); //memcpy((void*)img.data,(void*)(data +5), cols * rows * channels); return img; }