Efficiently passing Mat object in different classes

asked 2016-09-01 08:01:37 -0600

updated 2016-09-01 08:03:12 -0600

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.

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answered 2016-09-01 11:25:01 -0600

Tetragramm

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Assuming you need a separate copy in each, you should use .clone() to make copies. All clone does is a memcopy which might happen entirely within the CPU, whereas saving the image to disk involves multiple RAM and disk accesses. This should be obvious even in the simplest test.

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"whereas saving the image to disk involves multiple RAM and disk accesses." You could write the file to a RamDisk which would already speed up the current implementation by just changing the directory.

FooBar ( 2016-09-02 00:39:30 -0600 )edit

You are right, there are faster ways than what he's doing. But that's because just about anything is faster than that. clone() is certainly the best way.