Complex sentence: More advance system of bokeh use hardware system of 2 sensors, one sensor to take photo as usual and the other ones records depth informations and then bokeh effect and refocusing can be applied to an image after the photo is taken.
Split into simpler sentences: More advance system of bokeh use hardware system of 2 sensors, one sensor to take photo as usual while other ones record depth information. Bokeh effect and refocusing can then be applied to an image after the photo is taken.