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OpenCV: Computer Vision Projects with Python by Michael Beyeler, Prateek Joshi, Joseph Howse

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An object-oriented design

Python applications can be written in a purely procedural style. This is often done with small applications like our basic I/O scripts, discussed previously. However, from now on, we will use an object-oriented style because it promotes modularity and extensibility.

From our overview of OpenCV's I/O functionality, we know that all images are similar, regardless of their source or destination. No matter how we obtain a stream of images or where we send it as output, we can apply the same application-specific logic to each frame in this stream. Separation of I/O code and application code becomes especially convenient in an application like Cameo, which uses multiple I/O streams.

We will create classes called CaptureManager ...

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