Read Should you normalize RGB values by 255 or 256?

Read Should you normalize RGB values by 255 or 256? about two common apprroaches:

Standard division by 255

pixels = img / 255.0
result = process(pixels)
output = np.trunc(result * 255 + 0.5)

Alternative division by 256

pixels = (img + 0.5) / 256.0
result = process(pixels)
output = np.trunc(result * 256)