You don’t need std::make_sharedcv::Mat(800, 5120, CV_8UC1)
Mat already use shared data
instead of roi you should try
◆ Mat() [13/29]
| cv::Mat::Mat | ( | int | ndims, |
|---|---|---|---|
| const int * | sizes, | ||
| int | type, | ||
| void * | data, | ||
| const size_t * | steps = 0 |
||
| ) | |||
| OpenCV: cv::Mat Class Reference |