Introduction of opencv

1. OpenCV Python Tutorial For Beginners 1 - Introduction
to what is OpenCV
Welcome to articl on OpenCV Python Tutorial For Beginners. In this article I
am going to give you a brief Introduction to OpenCV and computer vision.
OpenCV is an image
processing library created by Intel and later supported by Willow Garage and
now maintained by Itseez. opencv is available on Mac, Windows, Linux.
Works in C, C++, and Python. it is Open Source and free.opencv is easy to
use and install. Starting with an overview of what the course will be covering,
we move on to discussing morphological operations and practically learn
how they work on images. We will then learn contrast enhancement using
equalization and contrast limiting.
Finally we will learn 3 methods to subtract the background from the video
and implement them using OpenCV. At the end of this course, you will have a
firm grasp of Computer Vision techniques using OpenCV libraries. This
course will be your gateway to the world of data science. Feel the real power
of Python and programming! The course offers you a unique approach of
learning how to code by solving real world problems.

2. Open CV tutorial for beginners using Python:
In this Article I'm going to give you a brief
introduction about open CV :
but first of all let's see what is computer vision because open CV is an open
source computer vision library so computer vision is the way of teaching
intelligence to machines and making them see things just like humans so
what happens when a human see an image he will be able to recognize the
faces which are there inside the images so in its simplest form computer
vision is what allows computers to see and process visual data just like
humans computer vision involves analyzing images to produce useful
information.
So to give you some examples a self-driving car it can detects the lanes
using computer visions or you might have wondered how Facebook detects
images when you upload the images of you with your friends it becomes
possible by Facebook's face an image recognition technology.

3. So now let's see what is openCV:
So open CV which stands for open source computer vision is a library of
programming functions mainly aimed at real-time computer vision it is
originally developed by Intel and then it was later supported by a developer
called Willow Garage and now it is supported and maintained by ITC's.
Now open CV is available on Mac Windows and various Linux operating
systems so we can say that open CV is a cross-platform library now you can
work on open CV using C C++ or Python and we will be using Python to learn
open CV.
Open CV is a open source and free library which is licensed under BSD
license and it's said that it is very easy to use an installer that we will see
when we will install open CV on various operating systems .
now because open CV primarily deals with computer vision that means
dealing with mainly images or videos.
Read also :Free e-Book Learning OpenCV
So I wanted to show you how a digital image is seen by a computer so digital
images are typically stored in the form of matrix now if you have heard about
PPI or pixel per inch which refers display resolution that means how many
individual pixels are displayed in one inch of digital image.
So when a computer sees a picture it sees it in the form of pixel matrix.

4. Now there are two type of digital images one are called grayscale images and
other are called colored images.
so in grayscale images each pixel represents the intensity of only one shade
that means how bright or dark the pixel is in other word it is said that it has
only one channel so on the right hand side you can see a grayscale image
and on the left hand side you can see a colored image.
so in colored images we have three channels that is our GB which stands for
red green blue so grayscale images have one channel and colored images
have three channels your standard digital camera have three channels
that means red green blue channels.
so we will learn more about images and how we can process images using
OpenCV in the later videos.

5. Read also :OpenCV by Example Enhance your understanding of computer vision and
image processing by developing realistic projects in OpenCV 3
now there is one more thing which I want to show you is numpy.
so we are going to learn OpenCV using Python so when you will install
OpenCV library for python on your operating system numpy will be
automatically installed with this library.
so first of all what is numb by
So numpy is a highly optimized library for numerical operations now as I told
you digital images are 2d arrays of pixels and numpy library is a general-
purpose array processing package library.
so it provides a high-performance multi-dimensional array object and tools
for working with these arrays which makes the processing of images easier
now all the opencv array structures are converted to and converted from
numpy arrays and in addition you can use more convenient indexing system
rather than using for loops .
so when you want to learn OpenCV using Python you need to have some
knowledge about numpy also so if you have some knowledge of Nampa
library it's good but don'tworry I will teach you step by step so you will not
miss anything so that was
a brief introduction about computer vision and OpenCV in the next toturial.
I'm going to show you how you can install Python OpenCV library and then
we will see how we can work with this OpenCV library so that's it for this
video I will see you in the next Article.