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python programming -opencv

So the question is y python , i got bored with java and have been doing java
programming for years ,my friend sugggested to learn python thats it.


python is interesting ...

Here comes playing with open cv ,using which u can actually play with images ,
videos and via ur web cam.

So here s the code to use open cv to load img and video.
before that u need to install

python 3.7
open cv
numpy

before that check the python installation is working fine .
go to installation folder in windows AppData\Local\Programs\Python\Python37

open command prompt

cmd>python

this should give u the version like this

Python 3.7.1 (v3.7.1:260ec2c36a, Oct 20 2018, 14:57:15) [MSC v.1915 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>>

then try to install 'pip ' which is required to install all dependencies.

once pip is installed -
u can find pip inside this location.
AppData\Local\Programs\Python\Python37\Scripts

open command prompt 
cmd>pip install numpy

this should install numpy.

similar fashion install required dependencies.

Then open up python editor ,in this case im using pyton IDLE

just type - import cv2 >>
then import numpy >>

if u dont get errors u can start programming  ,otherwise
try to resolve the errors and then proceed.


u can refer this for open cv and python tutorials -https://opencv.org/about.html
if u want to try out with different language say java u can find the tutorials too.


import cv2
import numpy as np

cap =cv2.VideoCapture(0)  -- 0 is for video camera 1

while True:
  ret, frame = cap.read()
  grey = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
  cv2.imshow('grey', grey)
 

  if cv2.waitKey(1) & 0xFF == ord('q'):
    break
cap.release()
cv2.destroyAllWindows()





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