Fig. 2

Legend of test image 1 (8 px to 5 px, equivalent to 80″ to 50″ at 65 cm). This image contains 12 rectangles (720 × 960 px). The disparities are set at 8 px in the first line (the top 3 rectangles); 7px in the second line; 6px in the third line; and 5px in the fourth line. The dot size is 1px, 6px and 10px in the first line; 10px, 1px and 6px in the second line; 6px, 10px and 1px in the third line; 1px, 6px and 10px in the fourth line. The size of the test symbol is 460 × 460 px for the circle, square and apple; the main body of the house is also 460 × 460 px with the eaves extending another 50px on the left and right side, respectively. The target symbols hidden in the rectangles are the square, circle and apple in the first line; the house, circle and square in the second line; the apple, square and circle in the third line; the house, house and apple in the fourth line. a is seen by the left eye and b is seen by the right eye. c is the simulation of the percepts generated by the test images a and b. This is an attempt to simulate what a subject might perceive when fusing a and b as one image. The stereo symbols appear to pop out of the background plane