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Please mark my answer as correct, and please make sure to give me an upvote. :)

import cv2
import numpy

frame = cv2.imread('sparks.png')

if frame is None:
    print('Error loading image')
    exit()

rows = frame.shape[0]
cols = frame.shape[1]

for i in range(0, rows):
    for j in range(0, cols):
        R = frame[i, j][2]
        G = frame[i, j][1]
        B = frame[i, j][0]

        Y =   16 +  65.738*R/256 + 129.057*G/256 +  25.064*B/256
        Cb = 128 -  37.945*R/256 -  74.494*G/256 + 112.439*B/256
        Cr = 128 + 112.439*R/256 -  94.154*G/256 -  18.285*B/256

Please mark my answer as correct, correct (click the check mark), and please make sure to give me an upvote. :)

import cv2
import numpy

frame = cv2.imread('sparks.png')

if frame is None:
    print('Error loading image')
    exit()

rows = frame.shape[0]
cols = frame.shape[1]

for i in range(0, rows):
    for j in range(0, cols):
        R = frame[i, j][2]
        G = frame[i, j][1]
        B = frame[i, j][0]

        Y =   16 +  65.738*R/256 + 129.057*G/256 +  25.064*B/256
        Cb = 128 -  37.945*R/256 -  74.494*G/256 + 112.439*B/256
        Cr = 128 + 112.439*R/256 -  94.154*G/256 -  18.285*B/256

Please mark my answer as correct (click the check mark), and please make sure to give me an upvote. :)

import cv2
import numpy

frame = cv2.imread('sparks.png')

if frame is None:
    print('Error loading image')
    exit()

rows = frame.shape[0]
cols = frame.shape[1]

for i in range(0, rows):
    for j in range(0, cols):
        R = frame[i, j][2]
        G = frame[i, j][1]
        B = frame[i, j][0]

        Y =   16 +  65.738*R/256 + 129.057*G/256 +  25.064*B/256
        Cb = 128 -  37.945*R/256 -  74.494*G/256 + 112.439*B/256
        Cr = 128 + 112.439*R/256 -  94.154*G/256 -  18.285*B/256

ycrcb_frame = cv2.cvtColor(frame, cv2.COLOR_BGR2YCrCb)

Please mark my answer as correct (click the check mark), and please make sure to give me an upvote. :)

import cv2
import numpy

frame = cv2.imread('sparks.png')

if frame is None:
    print('Error loading image')
    exit()

rows = frame.shape[0]
cols = frame.shape[1]

for i in range(0, rows):
    for j in range(0, cols):
        R = frame[i, j][2]
        G = frame[i, j][1]
        B = frame[i, j][0]

        Y =   16 +  65.738*R/256 + 129.057*G/256 +  25.064*B/256
        Cb = 128 -  37.945*R/256 -  74.494*G/256 + 112.439*B/256
        Cr = 128 + 112.439*R/256 -  94.154*G/256 -  18.285*B/256

Thanks to Lberger for this simpler OpenCV code:

ycrcb_frame = cv2.cvtColor(frame, cv2.cvtColor(bgr_frame, cv2.COLOR_BGR2YCrCb)

Please mark my answer as correct (click the check mark), and please make sure to give me an upvote. :)

import cv2
import numpy

frame = cv2.imread('sparks.png')

if frame is None:
    print('Error loading image')
    exit()

rows = frame.shape[0]
cols = frame.shape[1]

for i in range(0, rows):
    for j in range(0, cols):
        R = frame[i, j][2]
        G = frame[i, j][1]
        B = frame[i, j][0]

        Y =   16 +  65.738*R/256 + 129.057*G/256 +  25.064*B/256
        Cb = 128 -  37.945*R/256 -  74.494*G/256 + 112.439*B/256
        Cr = 128 + 112.439*R/256 -  94.154*G/256 -  18.285*B/256

Thanks to Lberger LBerger for this simpler OpenCV code:

ycrcb_frame = cv2.cvtColor(bgr_frame, cv2.COLOR_BGR2YCrCb)

Please mark my answer as correct (click the check mark), and please make sure to give me an upvote. :)

import cv2
import numpy

frame = cv2.imread('sparks.png')

if frame is None:
    print('Error loading image')
    exit()

rows = frame.shape[0]
cols = frame.shape[1]

for i in range(0, rows):
    for j in range(0, cols):
        R = frame[i, j][2]
        G = frame[i, j][1]
        B = frame[i, j][0]

        Y =   16 +  65.738*R/256 + 129.057*G/256 +  25.064*B/256
        Cb = 128 -  37.945*R/256 -  74.494*G/256 + 112.439*B/256
        Cr = 128 + 112.439*R/256 -  94.154*G/256 -  18.285*B/256

Thanks to LBerger for this simpler OpenCV code:

ycrcb_frame = cv2.cvtColor(bgr_frame, cv2.COLOR_BGR2YCrCb)

Please mark my answer as correct (click the check mark), and please make sure to give me an upvote. :)

import cv2
import numpy

frame = cv2.imread('sparks.png')

if frame is None:
    print('Error loading image')
    exit()

rows = frame.shape[0]
cols = frame.shape[1]

for i in range(0, rows):
    for j in range(0, cols):
        R = frame[i, j][2]
        G = frame[i, j][1]
        B = frame[i, j][0]

        Y =   16 +  65.738*R/256 + 129.057*G/256 +  25.064*B/256
        Cb = 128 -  37.945*R/256 -  74.494*G/256 + 112.439*B/256
        Cr = 128 + 112.439*R/256 -  94.154*G/256 -  18.285*B/256

Thanks to LBerger for this simpler OpenCV code:

ycrcb_frame = cv2.cvtColor(bgr_frame, cv2.COLOR_BGR2YCrCb)

... this is not to say that OpenCV uses the same constants as used here in the manual approach.