ABSTRACT
This paper studies how to flexibly integrate reconstructed 3D models into practical 3D modeling pipelines such as 3D scene creation and rendering. Due to the technical difficulty, one can only obtain rough 3D models (R3DMs) for most real objects using existing 3D reconstruction techniques. As a result, physically-based rendering (PBR) would render low-quality images or videos for scenes that are constructed by R3DMs. One promising solution would be representing real-world objects as Neural Fields such as NeRFs, which are able to generate photo-realistic renderings of an object under desired viewpoints. However, a drawback is that the synthesized views through Neural Fields Rendering (NFR) cannot reflect the simulated lighting details on R3DMs in PBR pipelines, especially when object interactions in the 3D scene creation cause local shadows. To solve this dilemma, we propose a lighting transfer network (LighTNet) to bridge NFR and PBR, such that they can benefit from each other. LighTNet reasons about a simplified image composition model, remedies the uneven surface issue caused by R3DMs, and is empowered by several perceptual-motivated constraints and a new Lab angle loss which enhances the contrast between lighting strength and colors. Comparisons demonstrate that LighTNet is superior in synthesizing impressive lighting, and is promising in pushing NFR further in practical 3D modeling workflows.
ABSTRACT
A novel facultatively anaerobic bacterium, designated strain LAM0618(T), was isolated from biogas slurry samples collected from the large-scale anaerobic digester of Modern Farming Corporation in Hebei Province, China. Cells of strain LAM0618(T) were Gram-stain-positive, motile, non-spore-forming and short-rod-shaped. The optimal temperature and pH for growth were 30 °C and 7.0, respectively. The strain did not require NaCl for growth but tolerated up to 70 g NaCl l(-1). The major fatty acids of strain LAM0618(T) were iso-C(15 : 0), anteiso-C(15 : 0), iso-C(14 : 0), C(16 : 0) and C(18 : 0). The predominant menaquinones of strain LAM0618(T) were menaquinone 7 (MK-7) and menaquinone 6 (MK-6). The main polar lipids of strain LAM0618(T) were phosphatidylglycerol, diphosphatidylglycerol, phosphatidylethanolamine and six unknown glycolipids. The genomic DNA G+C content was 41 mol% as determined by the Tm method. Analysis of the 16S rRNA gene sequence revealed that strain LAM0618(T) was a member of the genus Kurthia, and was most closely related to 'Kurthia massiliensis' DSM 24639, Kurthia zopfii DSM 20580(T), Kurthia gibsonii DSM 20636(T) and Kurthia sibirica DSM 4747(T), with 96.9, 95.7, 95.6 and 94.9â% sequence similarity, respectively. Based on its phenotypic and genotypic properties, strain LAM0618(T) is suggested to represent a novel species of the genus Kurthia, for which the name Kurthia huakuii sp. nov. is proposed. The type strain is LAM0618(T) (â=âACCC 06121(T)â=âJCM 19187(T)).
