Рендеринг без допущений

Пример рендеринга без допущений с помощью Indigo Renderer.

В компьютерной графике рендеринг без допущений (англ. unbiased rendering) — метод рендеринга, который не привносит систематических ошибок или искажений в оценке освещенности. Из-за этого он часто используется для генерации эталонного изображения, с которым сравниваются другие методы визуализации. Математически говоря, математическое ожидание несмещённой оценки всегда будет равно выборочному среднему для любого числа наблюдений. Ошибки рендеринга без допущений относятся на счёт дисперсии и проявляются как высокочастотный шум в получаемом изображении. Разница уменьшается на и стандартного отклонения по для точек, то есть для сокращения вдвое стандартного отклонения ошибки необходимо в четыре раза больше точек данных. Это делает объективные методы визуализации (рендеринг без допущений) менее привлекательным для интерактивных приложений реального времени. И наоборот, полученная с помощью объективной визуализации гладкая и бесшумная картинка является правильной со стохастической точки зрения.

Программы рендеринга без допущений

См. также

Примечания

  1. James Arvo, Marcos Fajardo, Pat Hanrahan, Henrik Wann Jensen, Don Mitchell, Matt Pharr, Peter Shirley. State of the Art in Monte Carlo Ray Tracing for Realistic Image Synthesis. SIGGRAPH 2001 Courses. Дата обращения: 30 ноября 2014. Архивировано 4 марта 2016 года.

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