#!/usr/bin/env python
# coding: utf-8

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import cv2 as cv
import numpy as np


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img = cv.imread('reflections.jpg')


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type(img)


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img.shape


# In[5]:


img.size


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320*900*3


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img.dtype


# In[8]:


img[100,100]


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img[100,100,0]


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cv.imshow('image', img)
cv.waitKey(0)
cv.destroyAllWindows()


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for r in range(100):
    for c in range(100):
        img[r,c] = np.array([5,50,180])


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cv.imshow('altered image', img)
cv.waitKey(0)
cv.destroyAllWindows()


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img[100:200,100:200] = np.array([5,50,180])


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cv.imshow('altered image', img)
cv.waitKey(0)
cv.destroyAllWindows()


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img.shape[0]


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img.shape[1]


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img.shape[2]


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img[200:300,200:300,2] = 128 


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cv.imshow('altered image', img)
cv.waitKey(0)
cv.destroyAllWindows()


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cv.imwrite('alteredreflections.jpg', img)


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squarechunk = img[200:300, 600:700]


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cv.imshow('altered image', squarechunk)
cv.waitKey(0)
cv.destroyAllWindows()


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