Bouda et al. propose a color image edge detector that models brightness as a virtual electric charge in order to calculate an electric field to yield gradients and then edges. Each pixel uses its 3-by-3 spatial neighborhood and three spectral bands to yield a 3-cube on which to place the virtual charges. The implementation then reduces the calculation, yielding a fast method and good results on test images. The results are compared to standard methods. One wonders whether this could be a model for mammalian vision as well. The paper contains a selected review of edge detection methods and 27 references.