Solution overview: Facial recognition

- [Instructor] My solution for this challenge…uses OpenCV to detect and count faces within an image.…OpenCV is a popular computer vision library…that's open source,…available for all of the major operating systems,…and it has interfaces for Python, Java, and C++.…In addition to OpenCV, my challenge solution…uses several other Python modules.…From Python's standard library,…I used the json module to format data for the json output,…tkinter to generate a file dialog box,…and the os module to manipulate file paths…to the input image and the output json file.…

External modules include cv2,…which is the OpenCV wrapper for Python,…and imageio, which provides support…to import and export a number of common image formats.…OpenCV does not natively support loading .gif files,…so I needed to use the imageio module…to meet the challenge requirements.…To install OpenCV for Python…and to the imageio module using pip,…simply type pip install…opencv-contrib -python imageio…into a command prompt and hit enter.…

When installing OpenCV, make sure to use…