How to save Ycbcr numpy array to an image without changing its array points?

Question

I had an rgb image which I converted into Ycbcr array.

rgb = cv2.imread(image)
r,g,b = cv2.split(rgb)

def ycbcr(r, g, b): 
     y = .299*r + .587*g + .114*b
     cb = 128 -.168736*r -.331364*g + .5*b
     cr = 128 +.5*r - .418688*g - .081312*b
     x= cv2.merge((y,cb,cr))
  return x

plt.savefig("Ycbcr_new.jpg") # saved in a new folder on my desktop

I saved this array as Ycbcr_new.jpg, Now I converted this new Ycbcr_new image into an array.

ycbcr1 = cv2.imread(Ycbcr_new.jpg)
ycbcr1 == x

The answer is: "False"

My question is Is it possible to save the new YCbCr array into a YCbCr image on my desktop without changing its array points?

Thank you