A scanning code consists of a $9\times 9$ grid of squares, with some of its squares colored black and the rest colored white. There must be at least one square of each color in this grid of $81$ squares. A scanning code is called symmetric if its look does not change when the entire square is rotated by a multiple of $90^{\circ }$ counterclockwise around its center, nor when it is reflected across a line joining opposite corners or a line joining midpoints of opposite sides. What is the total number of possible symmetric scanning codes?