A method includes reading a first analog reference signal from a first storage node in a dual conversion gain pixel, and converting the first analog reference signal to a first digital reference signal using a comparator coupled to the dual conversion gain pixel. The method also includes reading a first analog image signal from the first storage node, and converting the first analog image signal to a first digital image signal using the comparator. A second analog image signal may be read from the first storage node and a second storage node in the dual conversion gain pixel, and the second analog image signal may be converted to a second digital image signal. A second analog reference signal may be read from the first storage node and the second storage node, and the second analog reference signal may be converted to a second digital reference signal using the comparator.