Mat deserialized from FileStorage - NullPointerException Pointer address of argument 1 is NULL · Issue #1037 · bytedeco/javacv · GitHub
FileStorage access segfaults after assignment (assignment operator invalidates object) · Issue #17412 · opencv/opencv · GitHub
![c++ - Creating bigger image out of small image Mat [opencv, background subtraction] - Stack Overflow c++ - Creating bigger image out of small image Mat [opencv, background subtraction] - Stack Overflow](https://i.stack.imgur.com/8C5Hc.png)