Learn opencv in Bangla_1(What is opencv and how to install opencv)

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How to Adding and Blending image in OpenCV.

Image
import cv2 import numpy as np img = cv2.imread( 'Mehjabin.png' ) img2 = cv2.imread( 'ImageCV.jpg' ) resize_img = cv2.resize(img2 , (img.shape[ 1 ] , img.shape[ 0 ])) add_img = cv2.add(img , resize_img) Blending_img = cv2.addWeighted(img , 0.6 , resize_img , 0.4 , 0 ) while True : cv2.imshow( 'window' , img) cv2.imshow( 'window2' , img2) cv2.imshow( 'window3' , Blending_img) if cv2.waitKey( 1 ) == 27 : break cv2.destroyAllWindows()
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How draw Line, Rectangle, Circle, Triangle, and write text in openCV.

import cv2 import numpy as np black_image = np.zeros(( 600 , 800 , 3 ) , np.uint8) cv2.line(black_image , ( 0 , 0 ) , ( 800 , 600 ) , ( 255 , 0 , 0 ) , 3 ) cv2.rectangle(black_image , ( 0 , 0 ) , ( 300 , 400 ) , ( 255 , 0 , 0 ) , 3 ) cv2.circle(black_image , ( 400 , 300 ) , 100 , ( 255 , 0 , 0 ) , 2 ) cv2.circle(black_image , ( 200 , 150 ) , 100 , ( 255 , 0 , 0 ) , - 1 ) pts = np.array([[ 0 , 600 ] , [ 800 , 600 ] , [ 400 , 300 ]]) cv2.polylines(black_image , [pts] , True, ( 255 , 255 , 0 ) , 2 ) font = cv2.FONT_HERSHEY_SIMPLEX cv2.putText(black_image , 'you are best' , ( 0 , 300 ) , font , 4 , ( 0 , 255 , 0 )) while True : cv2.imshow( 'window' , black_image) if cv2.waitKey( 1 ) == 27 : break cv2.destroyAllWindows()
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Making Border on Image, splitting and merging Color Channels in opencv.

import cv2 import numpy as np img = cv2.imread( 'ImageCV.jpg' ) blue , green , red = cv2.split(img) img2 = cv2.merge((green , blue , red)) replicate = cv2.copyMakeBorder(img , 20 , 20 , 20 , 20 , cv2.BORDER_REPLICATE) reflect = cv2.copyMakeBorder(img , 20 , 20 , 20 , 20 , cv2.BORDER_REFLECT) reflect_101 = cv2.copyMakeBorder(img , 20 , 20 , 20 , 20 , cv2.BORDER_REFLECT_101) constant = cv2.copyMakeBorder(img , 20 , 20 , 20 , 20 , cv2.BORDER_CONSTANT , None, ( 0 , 0 , 255 )) wrap = cv2.copyMakeBorder(img , 20 , 20 , 20 , 20 , cv2.BORDER_WRAP) while True : cv2.imshow( 'original' , img) cv2.imshow( 'replicate' , replicate) cv2.imshow( 'reflect' , reflect) cv2.imshow( 'reflect_101' , reflect_101) cv2.imshow( 'constant' , constant) cv2.imshow( 'wrap' , wrap) if cv2.waitKey( 1 ) == 27 : break cv2.destroyAllWindows()
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