Introduction

Programming paradigms:

Building blocks:

Language and paradigm do not really matter.

We focus on feature sets and how it affects testability.

OOP with Unit testing →

(typical “programming style” in our C++ code base)

struct IClassifier {

virtual double predict(cv::Mat img) = delete;

virtual ~IClassifier() = default;

};

struct IBGModel { ... virtual ~IBGModel() = default; };

struct PackageDetector {

PackageClassifier(const std::shared_ptr<IClassifier>& classifier,

const std::shared_ptr<IBGModel>& bgModel)

: _classifier(classifier), _bgModel(bgModel) {}

bool hasPackage(const Video& video) {

for (const auto& zone : _bgModel->getStaticZones(video)) {

if (_classifier->predict(zone.getImage()) > THRESHOLD)

return true;

}

return false;

}

private:

std::shared_ptr<IClassifier> _classifier;

std::shared_ptr<IBGModel> _bgModel;

};

Boring C++ Questions ?

Why ‘classifier' and 'bgmodel’ are passed to the constructor and not used directly ?

Software Design

S.O.L.I.D. design + others