Yuktha-Majella

import cv2 
import numpy as np
from matplotlib import pyplot as plt

img = cv2.imread('C:\\Users\\Admin\\Downloads\\thresholding\\landscape.jpg',0)

#Global thresholding
ret1,thresh1 = cv2.threshold(img,127,255,cv2.THRESH_BINARY)

#Otsu's thresholding

Yuktha-Majella

import cv2
import numpy as np

img = cv.imread('C:\\Users\\Admin\\Downloads\\thresholding\\annefrank_diary.jpg',0)

#Simple Thresholding
ret,thresh1 = cv.threshold(img,127,255,cv2.THRESH_BINARY)

#Different types of Adaptive Thresholding
thresh2 = cv2.adaptiveThreshold(img,255,cv2.ADAPTIVE_THRESH_MEAN_C,cv2.THRESH_BINARY,11,2)

Yuktha-Majella

import cv2 
import numpy as np

#import image as Gray-scale
img = cv.imread('C:\\Users\\Admin\\Downloads\\thresholding\\gradient.jpg',0)

#Different types of Simple Threshold
ret,thresh1 = cv2.threshold(img,127,255,cv2.THRESH_BINARY)
ret,thresh2 = cv2.threshold(img,127,255,cv2.THRESH_BINARY_INV)
ret,thresh3 = cv2.threshold(img,127,255,cv2.THRESH_TRUNC)

Yuktha-Majella

import cv2 
flags = [i for i in dir(cv2) if i.startswith('COLOR_')]
print(flags)

Yuktha-Majella

blue = np.uint8([[[255,0,0]]])
hsv_blue = cv2.cvtColor(blue,cv2.COLOR_BGR2HSV)
print("HSV value of Blue: ", hsv_blue)

Yuktha-Majella

import numpy as np

capture = cv2.VideoCapture(0)
capture.set(cv2.CAP_PROP_FRAME_WIDTH, 300)
capture.set(cv2.CAP_PROP_FRAME_HEIGHT, 300)
while(1):
    # Take each frame
    _, frame = capture.read()
    # Convert BGR to HSV
    hsv = cv2.cvtColor(frame, cv2.COLOR_BGR2HSV)

Yuktha-Majella

import numpy as np

bgr = cv2.imread('C:\\Users\\Admin\\Downloads\\color space\\pebbles.jpg')
#Conversion BGR -> Grayscale
gray = cv2.cvtColor(bgr, cv2.COLOR_BGR2GRAY)
#Conversion BGR -> HSV
hsv = cv2.cvtColor(bgr, cv2.COLOR_BGR2HSV)

cv2.imshow('BGR', bgr)
cv2.imshow('Grayscale', gray)

Yuktha-Majella

#Making Borders
import cv2
import numpy as np

BLUE = [255,0,0]
img = cv2.imread('C:\\Users\\Admin\\Downloads\\operations on images\\olympic_logo.png')

replicate = cv2.copyMakeBorder(img,10,10,10,10,cv2.BORDER_REPLICATE)
reflect = cv2.copyMakeBorder(img,10,10,10,10,cv2.BORDER_REFLECT)
reflect101 = cv2.copyMakeBorder(img,10,10,10,10,cv2.BORDER_REFLECT_101)

Yuktha-Majella

#Setting all values of Green channel in image to 0
img[:,:,1] = 0

Yuktha-Majella

#Merging Blue, Green and Red channels 
imgmerge = cv2.merge((b,g,r))