PYTHON

rgb to grayscale python opencv

import cv2
  
image = cv2.imread('C:/Users/N/Desktop/Test.jpg')
gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
  
cv2.imshow('Original image',image)
cv2.imshow('Gray image', gray)
  
cv2.waitKey(0)
cv2.destroyAllWindows()

opencv grayscale to rgb

backtorgb = cv2.cvtColor(gray,cv2.COLOR_GRAY2RGB)

how to convert into grayscale opencv

import cv2

# Reading color image as grayscale
gray = cv2.imread("color-img.png",0)

# Showing grayscale image
cv2.imshow("Grayscale Image", gray)

# waiting for key event
cv2.waitKey(0)

# destroying all windows
cv2.destroyAllWindows()

opencv get image rgb or grayscale

import Image

def is_grey_scale(img_path):
    img = Image.open(img_path).convert('RGB')
    w, h = img.size
    for i in range(w):
        for j in range(h):
            r, g, b = img.getpixel((i,j))
            if r != g != b: 
                return False
    return True

opencv rgb to gray custom

cv::transform(white_balance_image, i_test_base, cv::Matx13f(0.114, 0.587, 0.299));