Yes,
If I am not wrong, I think the inception v3 model was trained with different image preprocessing. After unroll the equation:
new_x = (original_x*0.299) / 0.5 + (0.485-0.5)/0.5  -->
new_x = (0.299*original_x + 0.485) / 0.5 - 1

the original_x is:
original_x = ((new_x + 1) * 0.5 - 0.485) / 0.299

which is mean subtraction and one unit deviation normalization by ( 0.485 and 0.299 resp.) this means that new_x was ranged between -1 and 1.