As a first (subjective) stage, visual examples of encrypting the Lena test image using various parameters are given.
At this stage, visual areas decompose the visual input into separate feature maps (colour, orientation, motion).. Secondly, all of these signals converge towards higher level areas (e.g. FEF, PEF, PPC).
This design allowed us to perform a series of conjunctions over these categories, thereby isolating the following processing stages: visual (all eight stimulus categories), orthographic (c-h) and phonological (f-h).
Subjects were excluded if they had missing preoperative IOP data or end-stage visual field (VF) damage.
Feature Integration Theory proposes a two-stage visual attention process: during first stage humans process several primary visual features; during second stage, the objects are analyzed with details.
Major arguments for the definition of a visual front end are that the first stages of visual processing should be as uncommitted as possible and allow initial processing steps to be shared between different later-stage visual modules, thus implying a uniform structure on the first stages of visual computations (Koenderink et al. 1992; Lindeberg 1994b, Sect. 1.1).
Subjects were excluded if they had missing preoperative IOP data, end-stage visual field (VF) damage, or had AIT combined with any other procedure besides phacoemulsification.
Reduced visual acuity seems to influence measurable reduction of quality of life earlier than field loss, and measurable utility may not be affected until end stage visual field status in the better eye [ 30, 31].
However, at later developmental stages, visual cortical hyperexcitability appears no longer to exercise a direct functional role in synesthetic experience, plausibly because of maturation and cortical specialization of the visual system [ 20].
