Modeling Thin Structures From Images And Point Clouds

A method for creating a 3D model of thin objects is disclosed. This method creates 3D models of each such thin object from cues taken from posed source images and 3D point clouds (which can come from depth maps of these images). The cues could be a vertically aligned line feature or discontinuity in a background image. The 3D models of the thin objects are then added to the input 3D point cloud, and a mesh reconstructed from this augmented point cloud. The above method allows easy creation of 3D imagery of near vertical or thin objects like poles or towers to be incorporated onto map

A Statistical Model for Synthesis of Detailed Facial Geometry

Detailed surface geometry contributes greatly to the visual realism of 3D face models. However, acquiring high-resolution face geometry is often tedious and expensive. Consequently, most face models used in games, virtual reality, or computer vision look unrealistically smooth. In this paper, we introduce a new statistical technique for the analysis and synthesis of small three-dimensional facial features, such as wrinkles and pores. We acquire high-resolution face geometry for people across a wide range of ages, genders, and races. For each scan, we separate the skin surface details from a smooth base mesh using displaced subdivision surfaces. Then, we analyze the resulting displacement maps using the texture analysis/synthesis framework of Heeger and Bergen, adapted to capture statistics that vary spatially across a face. Finally, we use the extracted statistics to synthesize plausible detail on face meshes of arbitrary subjects. We demonstrate the effectiveness of this method in several applications, including analysis of facial texture in subjects with different ages and genders, interpolation between high-resolution face scans, adding detail to low-resolution face scans, and adjusting the apparent age of faces. In all cases, we are able to re-produce fine geometric details consistent with those observed in high resolution scans.Engineering and Applied Science

Intelligent effective management system of biotechnical objects based on natural disturbances prediction

This article analyses Biotechnical objects as complex processes and external disturbances on them; promising areas of management systems of biotechnical objects development are identified; methodological bases for specialized algorithmic-mathematical software construction based on the methods of game theory and statistical solutions, neural networks (including genetic algorithm), filtering the noise components of information signals are synthesized and tested; variety of architectures of intelligent effective management systems of biotechnical objects are developed and tested

Self-similar texture for coherent line stylization

Oral Session: Lines and StrokesInternational audienceStylized line rendering for animation has traditionally traded-off between two undesirable artifacts: stroke texture sliding and stroke texture stretching. This paper proposes a new stroke texture representation, the self-similar line artmap (SLAM), which avoids both these artifacts. SLAM textures provide continuous, infinite zoom while maintaining approximately constant appearance in screen-space, and can be produced automatically from a single exemplar. SLAMs can be used as drop-in replacements for conventional stroke textures in 2D illustration and animation. Furthermore, SLAMs enable a new, simple approach to temporally coherent rendering of 3D paths that is suitable for interactive applications. We demonstrate results for 2D and 3D animations

Лечение дистальных стенозов бронхов после двусторонней трансплантации легких

The effi ciency of lung transplantation is considerably limited by the complications associated with the bronchial pathologies. Despite the progress of the treatment methods, bronchial complications are still remaining as an actual problem in the postoperative period with frequency of occurrence from 7 to 29%. However, the bronchial stenosis are the most common bronchial complications after lung transplantation with mortality from 2 to 4%.Aim. To study an experience of our center of bronchial stenosis treatment in lung recipients. Materials and methods. 34 patients underwent lung transplantation from September 2014 to January 2017. 6 (16%) of them had a stenosis of lobar or segmental bronchi from 84 to 494 postoperative day. 5 (83%) of them have demonstrated multifocal lesions. In all of the cases there was performed an endoscopic bougienage, which involved a balloon dilatation and electrocoagulated incision of granular tissue under X-ray control. After that the patients were administrated by everolimus.Results. Restenosis was formed in 132,0 ± 94,2 postoperative day after primary treatment in all patients. In four cases (67%) we used nitinol stent placement under X-ray control. There were no complications. In 3 cases stents were dislocated distally, so we needed to use repeated endoscopic bougienage to replace the stent. Using of everolimus has allowed to decrease the rate of restenosis, but it need future research.Conclusion. Distal bronchial stenosis after lung transplantation can be managed with endoscopic bougienage and stent placement. Adding everolimus has not signifi cantly affected the risk of frequency of restenosis.Осложнения, связанные с патологией бронхов, в значительной степени ограничивают эффективность трансплантации легких. Несмотря на существенный прогресс в методах лечения, бронхиальные осложнения остаются актуальной проблемой посттрансплантационного периода с частотой возникновения от 7 до 29%. При этом стенозы бронхов составляют наибольшую часть бронхиальных осложнений после трансплантации легких, смертность при которых составляет от 2 до 4%.Цель. Оценить опыт лечения бронхиальных стенозов у реципиентов легких в нашем центре.Материалы и методы. С сентября 2014 г. по октябрь 2017 г. было выполнено 34 двусторонних трансплантации легких. У шести реципиентов (18%) развились стенозы долевых бронхов в период от 84 до 494 дней после операции. У пятерых (83%) из них отмечено мультифокальное поражение бронхов. Всем было проведено эндоскопическое бужирование стенозов бронхов, включающее в себя баллонную дилатацию и электрокоагуляцию рубцовой ткани, под рентгенологическим контролем и в последующем назначен эверолимус.Результаты. В течение 132,0 ± 94,2 дня после первичного лечения у всех пациентов развился рестеноз бронхов. В четырех случаях (67%) пациентам был установлен нитиноловый самораскрывающийся стент под рентгенологическим контролем. Процедуры проведены без осложнений. В трех случаях после постановки стента была отмечена дистальная дислокация эндопротеза, что потребовало проведения дополнительного эндоскопического бужирования для коррекции положения стента. Применение эверолимуса позволило снизить частоту рестеноза бронхов, но его влияние требует дополнительного изучения.Заключение. Дистальные стенозы бронхов после трансплантации легких поддаются лечению с помощью эндоскопического бужирования и постановки бронхиальных стентов. Добавление эверолимуса достоверно не уменьшает риска рестеноза и требует дополнительного изучения.