Gradient-Domain Bidirectional Path Tracing

Gradient-domain path tracing has recently been introduced as an efficient realistic image synthesis algorithm. This paper introduces a bidirectional gradient-domain sampler that outperforms traditional bidirectional path tracing often by a factor of two to five in terms of squared error at equal render time. It also improves over unidirectional gradient-domain path tracing in challenging visibility conditions, similarly as conventional bidirectional path tracing improves over its unidirectional counterpart. Our algorithm leverages a novel multiple importance sampling technique and an efficient implementation of a high-quality shift mapping suitable for bidirectional path tracing. We demonstrate the versatility of our approach in several challenging light transport scenarios.

Sediment distribution, sand resources, and geologic character of the inner continental shelf off Galveston County, Texas /

"July 1979."

Geological character and mineral resources of south central Lake Erie /

"October 1982."

Selected methods for detecting and tracing hazardous materials spills /

Mode of access: Internet.

A short treatise on the unequal and disproportionate imposts levied on port-wine, shipped from Oporto to Great Britain; compared with the imp;osts levied on wines, of the same character, whipped to America and other countries.

Mode of access: Internet.

White and Negro spirituals, their life span and kinship, tracing 200 years of untrammeled song making and singing among our country folk, with 116 songs as sung by both races.

"The tune comparative list. One hundred and sixteen melodies of white people paired with same number of Negro-sung variants": p. [145]-227.

Read Chinese; a beginning text in the Chinese character. Hua wen tu pen,

Includes volumes of various editions.

A study of the digestibility of rations for the steers with special reference to the influence of the character and the amount of feed consumed /

Cover title.

Lines written in memory of the late Hon. Samuel Ongley, and descriptive of his character as a sportsman /

Caption title.

God helps those ... Psychology and the development of character,

Translation of Die Arbeit am Charakter.

Testimonies of the life, character, revelations and doctrines of Mother Ann Lee, and the elders with her, through whom the word of eternal life was opened in this day of Christ's second appearing,

First edition published, Hancock, 1816.