Free-viewpoint video allows the user to view objects from any virtual perspective,creating an immersive visual experience.This technology enhances the interactivity and freedom of multimedia performances.However,many free-viewpoint video synthesis methods hardly satisfy the requirement to work in real time with high precision,particularly for sports fields having large areas and numerous moving objects.To address these issues,we propose a freeviewpoint video synthesis method based on distance field acceleration.The central idea is to fuse multiview distance field information and use it to adjust the search step size adaptively.Adaptive step size search is used in two ways:for fast estimation of multiobject three-dimensional surfaces,and synthetic view rendering based on global occlusion judgement.We have implemented our ideas using parallel computing for interactive display,using CUDA and OpenGL frameworks,and have used real-world and simulated experimental datasets for evaluation.The results show that the proposed method can render free-viewpoint videos with multiple objects on large sports fields at 25 fps.Furthermore,the visual quality of our synthetic novel viewpoint images exceeds that of state-of-the-art neural-rendering-based methods.
Yanran DaiJing LiYuqi JiangHaidong QinBang LiangShikuan HongHaozhe PanTao Yang
The current immunooncology artificially ignores the connection with lymphopoiesis, though is only its derivative. Hematopoietic stem cells (HSC) provide physiological regeneration of biomass of the host, fetus, and malignant tumors, as well, as the cells’ reparation after sub-lethally injuring in any tissues and their renewal. HSC, especially of lymphoid lineage, are the most vulnerable of those, which are responsible for viability of organism. Natural and artificial deficits of HSC determine aging, multi-organs syndromes and death of the host, because their current proliferative resource (CPR) is individually limited at birth, and is spending irreversibly during wounds’ healing, pregnancy, tumor growth, and on. CPR, being an integral value of the number of stem cells along the length of their telomeres, is a “shagreen skin”, for which the tumor competes with normal tissues as a quasi-embryonic favorite and winner, especially in the final period of a shortening the life. The primary approach to cancer treatment must prioritize the preservation of CPR remnants, rather than their destruction, in order to temporarily halt the malignant process. The re-targeting of HSC from tumors in favor of normal tissues is the immediate objective of competitive therapy, which allows for preserving the rest of the CPR host’s resources, especially in patients with advanced cancer. However, the contradictory and insignificant practically, the dogma of antitumor cellular immunity continues to dominate and hinder progress in oncology.
Point-of-care ultrasound(POCUS)is a limited ultrasound examination performed by the clinician at the bedside,emerging as a complement to physical examination across various medical specialties.In the field of nephrology,its integration has been gradual,primarily limited to guiding procedures like temporary dialysis catheter placement or,in some cases,diagnostic kidney ultrasounds.In reality,the assessment of hemodynamic status at the bedside holds immense value for nephrologists,yet there exists limited awareness among practitioners regarding its implementation.While there is a growing trend towards incorporating multiorgan POCUS training in fellowship programs,private practice nephrologists remain relatively uninformed.This discussion explores the untapped potential of POCUS as a valuable diagnostic tool in everyday nephrology practice,demonstrating its effectiveness in diverse clinical settings,ranging from medical wards to outpatient dialysis units.Additionally,we delve into the challenges hindering its widespread adoption and consider the future trajectory of this innovative approach.
