Actually, the opposite, this is the same principle as a hyperspectral sensor. These line scan sensors (kind of like the pupil photos in the article) create "data cubes" (i.e. an 2D image with a 3rd spectral dimension for every spatial pixel) which are huge compared to red, green, & blue images. The article actually talks about how computationally intensive it is to handle and how that made squid so smart.
