Fig. 2: Color processing of Daltonism.
From: Multifunctional human visual pathway-replicated hardware based on 2D materials
a Light input of a 34 × 31-pixel trichromatic circular image with RGB components onto the tungsten diselenide (WSe2) split floating gate (SFG) array. Color vision in the human visual system. The single color opponency (SO) receptive field in the lateral geniculate nucleus (LGN) receives center-potentiated and surround-depressed signals of different colors from the retinal ganglion cells (RGC) in the retina. The double color opponency (DO) receptive field in the primary visual cortex (V1) integrates large and small SO signals in the same color type. They are both center-surround receptive fields (CSRFs). In area V4 and inferotemporal (IT) cortex, color information is analyzed by the neural network. b Hardware photoresponsivity distributions that correspond to red–green SO CSRF (small CSRF & large CSRF). Simulation (2D gray image) and experiment (3D voltage mapping) results of SO CSRF (c), DO CSRF (d), processed color information (e). Color bar: pixel intensity by simulation, voltage amplitude by experimental test with different individual color bars in each result. The gray shadings mark the results and color bar in simulation. f Test result of red–green color blindness (Daltonism) with 10% R&G pathway contribution (the weight coefficient of R&G integration from c–d is 0.1).
