2018-10-06 17:12:59 +03:00
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---
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2018-10-06 17:39:15 +03:00
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language: c++/python
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filename: learnopencv.py
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2018-10-06 17:12:59 +03:00
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contributors:
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- ["Yogesh Ojha", "http://github.com/yogeshojha"]
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---
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2018-10-06 17:39:15 +03:00
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### Opencv
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OpenCV (Open Source Computer Vision) is a library of programming functions mainly aimed at real-time computer vision.
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Originally developed by Intel, it was later supported by Willow Garage then Itseez (which was later acquired by Intel).
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Opencv currently supports wide variety of languages like, C++, Python, Java etc
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#### Installation
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Please refer to these articles for installation of OpenCV on your computer.
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* Windows Installation Instructions:
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<https://opencv-python-tutroals.readthedocs.io/en/latest/py_tutorials/py_setup/py_setup_in_windows/py_setup_in_windows.html#install-opencv-python-in-windows>
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* Mac Installation Instructions (High Sierra):
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https://medium.com/@nuwanprabhath/installing-opencv-in-macos-high-sierra-for-python-3-89c79f0a246a
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* Linux Installation Instructions (Ubuntu 18.04):
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<https://www.pyimagesearch.com/2018/05/28/ubuntu-18-04-how-to-install-opencv/>
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### Here we will be focusing on python implementation of OpenCV
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* __Reading image in OpenCV__
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```
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import cv2
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img = cv2.imread('cat.jpg')
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# Simple isn't it?
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# Displaying the image
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# imshow() function is used to display the image
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cv2.imshow('Image',img)
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# Your first arguement is the title of the window and second parameter is image
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# If you are getting error, Object Type None, your image path may be wrong. Please recheck the pack to the image
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cv2.waitKey(0)
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# waitKey() is a keyboard binding function and takes arguement in milliseconds. For GUI events you MUST use waitKey() function.
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```
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2018-10-06 17:12:59 +03:00
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Further Reading:
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An up-to-date language reference can be found at
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2018-10-06 17:39:15 +03:00
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<https://opencv.org/>
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2018-10-06 17:12:59 +03:00
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Additional resources may be found at
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<https://en.wikipedia.org/wiki/OpenCV>
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2018-10-06 17:39:15 +03:00
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Good OpenCv Tutorials
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<https://opencv-python-tutroals.readthedocs.io/en/latest/py_tutorials/py_tutorials.html>
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<https://realpython.com/python-opencv-color-spaces/>
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<https://pyimagesearch.com>
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<https://www.learnopencv.com>
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