Figure 1

The division and time integration procession of the fringe pattern: (a) the cutaway view of the expected sinusoidal super-grayscale grating and analog sinusoidal grating; (b) gray values at partial pixels of the digitized grating in (a); (c–e)The cutaway views of the three divided fringe patterns with 256-grayscale and analog sinusoidal grating; (f–h) the corresponding gray values at partial pixels of digitized fringe patterns in (c–e); (i) the cutaway view of the captured super-grayscale pattern and analog sinusoidal grating; (j) the gray values at partial pixels of the digitized fringe pattern in (i).