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Heterogeneous fog generated with the effect of light scattering and blur

Gawron M., Boryczka U.

Journal of Applied Computer Science

2018

Vol. 26, nr 2

31--43

The development of computer graphics forces new requirements on the developers, which will make the virtual world more similar to the real world. One of these elements is the simulation of fog. Common fog algorithms mix the color of the scene with the color of the fog over a certain distance. However, one feature of the naturally foggy scenery is ignored. With the distance and density of the fog, the observed scenery or individual objects become more blurred. In this paper we will present our implementation of the distance fog in the Unreal Engine 4, including the effect of blurring the foggy areas, simulating of light scattering and variations in fog density using noise.

Benchmarking image codecs by assessment of coded test images: the development of test images and new objective quality metrics

Punchihewa A., Bailey D. G., Hodgson R. M.

Journal of Telecommunications and Information Technology

2006

nr 1

11-16

Objective quality measures are required for benchmarking codec performance. Our aim was to develop a simple, accurate method capable of rapidly measuring the degree of blockiness, edge-blur and ringing due to image compression. Two test images were designed to emphasise these artefacts. The efficacy of the new metrics is demonstrated using a JPEG codec at a range of compression levels.