3D Residual Interpolation for Spike Camera Demosaicing

The recently invented spike camera can capture high-speed motion in dynamic scenes by accumulating incoming photons continuously and firing spikes at very high temporal resolution. This paper addresses the demosaicing problem in spike camera color imaging. Specifically, we propose the 3D residual interpolation (3DRI) method to convert raw spike frames to color image frames. Due to the Poisson effect of photon arrivals and the quantization effect of spike readout, the instantaneous intensity recovered from the spike stream may suffer from undesired noise. To handle the noise, we estimate the missing color pixels along motion trajectories to exploit the temporal correlation among neighboring frames. In addition, by utilizing the color channels correlation, we design a residual-based demosaicing pipeline that uses the green pixels to guide the estimation of the red or blue missing pixels. Experimental results demonstrate our proposed 3DRI can produce color images from spike streams, achieving a good objective and perceptual quality for high-motion scenes.