This philosophy, or paradigm, is largely derived from Helmholtz. It is, that visual and other perception is intelligent decision-taking, from limited sensory evidence. The essential point is that sensory signals are not adequate for direct or certain perceptions; so intelligent guessing is needed for seeing objects. The view taken here is that perceptions are predictive, never entirely certain, hypotheses of what may be out there.While Gregory does not "do anything" about this idea of problem-solving intelligence evolving from perceptual intelligence, there seems to be nothing in at least his conception of intelligent vision that precludes this.
It was, perhaps, the active intelligence of perception that was the evolutionary start of conceptual problem-solving intelligence. (Gregory, 1997, p. 5).