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Efficiently passing Mat object in different classes

I am currently doing a project which has around 6-7 classes and requires me to use an image across multiple classes.

The project code that I am referring to write my own code , does it by saving the image and loading it across different classes.

What doubt I have is Is this method efficient or I should set class variables for other classes. Which one of them will be efficient.

Efficiently passing Mat object in different classes

I am currently doing a project which has around 6-7 classes and requires me to use an image across multiple classes.

The project code that I am referring to write my own code , does it by saving the image and loading it across different classes.

What doubt I have is
Is this method efficient or I should set class variables for other classes. Which one of them will be efficient.

Efficiently passing Mat object in different classes

I am currently doing a project which has around 6-7 classes and requires me to use an image across multiple classes.

The project code that I am referring to write my own code , does it by saving the image and loading it across different classes.

What doubt I have is
Is this method efficient or I should set class variables and clone the image for the other classes. Which one of them will be efficient.