The Role of the All-Cone Fovea in Visual Imaging
June 16th, 2006 | No Comments »The all-cone central foveal region (that contains ~ 99% of the cone receptors of the retina) occupying the region within one degree of retina angle, is solely responsive to the single, long wavelength (red) limit of visual response. The diffractive nature of retinal response that follows from this explanation must mean that the fovea is located at the Fourier (or focal) plane of the eye. The fovea performs a 2-D Fourier transform of image infrmation acquired by the eye producing an ‘outline sketch’ of the perceived image. I believe that this is the ‘primal sketch’ introduced by Marr. The completion of the visual imaging process requires that a second inverse Fourier transform be performed. This must occur in the visual centers of the brain using the input from the initial wavelength-diffractive FT information from the eye. The idea that the fovea is comprised of ‘classes of cones’ that are responsive to three separate wavelengths is just plain wrong.
The eye is a Fourier transforming device.
GCH
