Game Development Reference
In-Depth Information
3.2.3.7 Colour discrimination
Warm colours (red, yellow) make the objects look larger than cool colours (green,
blue). Let's not forget that the colours are perceived by cones specialised to detect red,
green and blue. Ganglion cells of the retina function as antagonistic pairs (red-green,
blue-yellow, light intensity). This means that an alteration in the vision of one colour
by the specialised cone has an impact on the entire colour vision.
3.2.3.8 Field dependence-independence
Field dependence-independence is a characteristic of visual perception which is the
capacity found in some humans to quickly identify the objects in a complex scene
without a detailed scanning (field independence). The others have to scan all the
objects located in the field of vision to recognise the objects (field dependence). This
ability of independence is acquired from the age of 12 and only by a little less than 40%
of subjects. About 30% of the population remains field dependent and the remaining
is more or less dependent depending on the scenes watched. This dependence-
independence has its repercussions on the feeling of immersion in virtual reality sys-
tems. Those who depend on the field would need a larger field of vision to feel the visual
immersion.
3.3 CUTANEOUS SENSITIVITY
3.3.1 The skin
Touch receptors are constituents of the skin (Figure 3.19). It will be particularly inter-
esting to study the skin in detail because it is on the skin that one will have to work in
order to reproduce the desired touch sensations. Skin is a sensory organ that informs
us about the weight, roughness and temperature of the object we touch. It is the outer
cover of our body, originating from the ectoderm, formed by the epidermis that forms
Epidermis
Dermis
Sweat
gland
Meissner's
corpuscles
Pacini's
corpuscles
Ruffini's
corpuscles
Merkel cells
Open nerve endings
Figure 3.19 The skin
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