By Arnold Gallardo
Книга для 3D-визуализаторов из разряда «маст хэв» - прекрасно иллюстрированное справочное пособие по созданию освещения сцены: теория, общие принципы, конкретные примеры.
Read Online or Download 3D Lighting: History, Concepts, and Techniques (With CD-ROM) (Graphics Series PDF
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Extra resources for 3D Lighting: History, Concepts, and Techniques (With CD-ROM) (Graphics Series
The matrix formed by the activity of the cells of the intervening layers is the first step in vision signal processing. Visual fields have been found to have selective central sensitivity, which can make the field either excited or inhibited, depending on the stimuli on the field as well as on the surrounding receptors. So, if the central receptor is excited, the surrounding receptors are inhibited, and vice versa. This signal-processing system is quick and sensitive because it is either on or off, depending on the field’s neighbors’ state.
It responds to reds and yellows but is still more sensitive to blues and greens, resulting in red apples having the same gray tones as green leaves. Today’s blackand-white film, even if panchromatic, still suffers from tonal imbalance compared with what the eye expects to see, especially in dealing with greens and reds. Through the use of filtration, development changes, and exposure, the spectral response of black-and-white film can be exploited to change the tonality that film captures. CHAPTER 3 FUNDAMENTALS OF PHOTOGRAPHY AND CINEMATOGRAPHY F IGURE Scene shot with dyes added to film showing more of the blues and extreme violets.
C ORNEA The cornea is the central, glossy, transparent, hemispherical part of the eye. The cornea bends most light that enters the eye. It also determines whether or not the incoming light is parallel and directs it to fall in front of or behind the retina. I RIS The iris is the variable opening in the eye that changes with environmental light intensity. Its surface gives rise to the myriad coloration we see in individuals’ eyes. The opening left by the iris is called the pupil. F IGURE The eye.