Learning to Transfer Texture from Clothing Images to 3D Humans

In this paper, we present a simple yet effective method to automatically transfer textures of clothing images (front and back) to 3D garments worn on top SMPL, in real time. We first automatically compute training pairs of images with aligned 3D garments using a custom non-rigid 3D to 2D registration method, which is accurate but slow. Using these pairs, we learn a mapping from pixels to the 3D garment surface. Our idea is to learn dense correspondences from garment image silhouettes to a 2D-UV map of a 3D garment surface using shape information alone, completely ignoring texture, which allows us to generalize to the wide range of web images. Several experiments demonstrate that our model is more accurate than widely used baselines such as thin-plate-spline warping and image-to-image translation networks while being orders of magnitude faster. Our model opens the door for applications such as virtual try-on, and allows for generation of 3D humans with varied textures which is necessary for learning.Comment: IEEE Conference on Computer Vision and Pattern Recognitio

Generating Continual Human Motion in Diverse 3D Scenes

We introduce a method to synthesize animator guided human motion across 3D scenes. Given a set of sparse (3 or 4) joint locations (such as the location of a person's hand and two feet) and a seed motion sequence in a 3D scene, our method generates a plausible motion sequence starting from the seed motion while satisfying the constraints imposed by the provided keypoints. We decompose the continual motion synthesis problem into walking along paths and transitioning in and out of the actions specified by the keypoints, which enables long generation of motions that satisfy scene constraints without explicitly incorporating scene information. Our method is trained only using scene agnostic mocap data. As a result, our approach is deployable across 3D scenes with various geometries. For achieving plausible continual motion synthesis without drift, our key contribution is to generate motion in a goal-centric canonical coordinate frame where the next immediate target is situated at the origin. Our model can generate long sequences of diverse actions such as grabbing, sitting and leaning chained together in arbitrary order, demonstrated on scenes of varying geometry: HPS, Replica, Matterport, ScanNet and scenes represented using NeRFs. Several experiments demonstrate that our method outperforms existing methods that navigate paths in 3D scenes

A prospective observational study involving three fixed infusion regimens of phenylephrine for hemodynamic support during spinal anaesthesia for caesarian delivery

Background: Spinal anaesthesia used in caesarian section is associated with hypotension which can have maternal and fetal side effects. To determine the efficacy and ideal dosing of Phenylephrine in attenuating the hypotensive episodes during caesarean section under spinal anaesthesia.Methods: 100 patients were allocated to four groups, placebo group (PE 0) and 3 fixed phenylephrine infusion regimens, phenylephrine 25 μg/min-1 (PE 25), phenylephrine 50 μg/min-1 (PE 50), and phenylephrine 75 μg/min-1 (PE 75). Blood pressure, heart rate were noted among primary variables and fetal parameters like umbilical blood pH and lactate were recorded as secondary parameters.Results: There was a significant reduction in heart rate with increasing the infusion dosage of phenylephrine, with a mean of 86.8 beats/min at the end of procedure in placebo group and 69.4 beats/min in 75 μg group (p value <0.001). There was significant statistical difference among systolic blood pressure in the four groups after 7 min of the procedure and p-value of <0.05 with better attenuation of hypotension in infusion groups as compared to placebo. Similarly there was significant statistical difference in diastolic blood pressure among the four groups after 8 min of the procedure with p values <0.05.Conclusions: Prophylactic phenylephrine infusions reduced the incidence and severity of maternal pre-delivery hypotension. Among the fixed rate phenylephrine infusion regimens investigated, infusion rates of 50 μg/min-1 were associated with greater maternal hemodynamic stability compared with 25 and 75 μg/min-1, with minimal side effects and intervention

Platelet–Neutrophil Association in NETs-Rich Areas in the Retrieved AIS Patient Thrombi

Histological structure of thrombi is a strong determinant of the outcome of vascular recanalization therapy, the only treatment option for acute ischemic stroke (AIS) patients. A total of 21 AIS patients from this study after undergoing non-enhanced CT scan and multimodal MRI were treated with mechanical stent-based and manual aspiration thrombectomy, and thromboembolic retrieved from a cerebral artery. Complementary histopathological and imaging analyses were performed to understand their composition with a specific focus on fibrin, von Willebrand factor, and neutrophil extracellular traps (NETs). Though distinct RBC-rich and platelet-rich areas were found, AIS patient thrombi were overwhelmingly platelet-rich, with 90% of thrombi containing + and neutrophil-elastase+) containing citrullinated histone-decorated DNA. Citrullinated histone-decorated DNA also accumulated extracellularly, pointing to NETosis by the activated neutrophils. Notably, NETs-containing areas showed strong reactivity to VWF, platelets, and high-mobility group box 1 (HMGB1), signifying a close interplay between these components