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Code testing specifications

Mastering OpenCV 4 with Python requires some installed packages, which you can see here:

Chapter 1, Setting Up OpenCV: opencv-contrib-python
Chapter 2, Image Basics in OpenCV: opencv-contrib-python and matplotlib
Chapter 3, Handling Files and Images: opencv-contrib-python and matplotlib
Chapter 4, Constructing Basic Shapes in OpenCV: opencv-contrib-python and matplotlib
Chapter 5, Image Processing Techniques: opencv-contrib-python and matplotlib
Chapter 6, Constructing and Building Histograms: opencv-contrib-python and matplotlib
Chapter 7, Thresholding Techniques: opencv-contrib-python, matplotlib, scikit-image, and scipy
Chapter 8, Contours Detection, Filtering, and Drawing: opencv-contrib-python and matplotlib ...

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