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In order to make good decisions, we use our knowledge and our reasoning. Often, this knowledge and reasoning is sound and solid. However, sometimes, we are swayed by biases or by others manipulating a situation. For example, let’s say you and three friends wanted to rent a house and had a combined target budget of $1,600. The realtor shows you only very run-down houses for $1,600 and then shows you a very nice house for $2,000. Might you ask each person to pay more in rent to get the...
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Diffusion is the passive movement of substances down their concentration gradients—requiring no expenditure of cellular energy. Substances, such as molecules or ions, diffuse from an area of high concentration to an area of low concentration in the cytosol or across membranes. Eventually, the concentration will even out, with the substance moving randomly but causing no net change in concentration. Such a state is called dynamic equilibrium, which is essential for maintaining overall...
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Diffusion is a type of passive transport. In passive transport, a substance tends to move from an area of high concentration to an area of low concentration until the concentration is equal across the space. For example, take the diffusion of substances through the air. When someone opens a perfume bottle in a room filled with people, the perfume is at its highest concentration in the bottle and is at its lowest at the edges of the room. The perfume vapor will diffuse, or spread away, from the...
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In the plasma membrane, the lipids forming the bilayer can also act as an anchor to tether proteins to the membrane. The three main types of lipid anchors found in eukaryotes are – prenyl groups, fatty acyl groups, and glycosylphosphatidylinositol or GPI groups. Prenyl and fatty acyl groups act as anchors on the cytosolic surface of the membrane, whereas GPI anchors proteins on the extracellular side.
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Anchoring junctions are multiprotein complexes that help cells connect to other cells and the extracellular matrix. Anchoring junctions are present on the lateral and basal surfaces of cells, providing strong and flexible connections. Focal adhesions are often formed due to cell interactions with the ECM substrata, which initiate signal transduction via kinase cascades and other mechanisms. Together, they provide stability and tissue integrity. There are three types of anchoring junctions:...
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GPI-anchoring is a post-translational, reversible protein modification that is ubiquitous in eukaryotes. Such proteins are primarily present on the exoplasmic leaflet of the plasma membrane.
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Make-Your-Anchor+: Generación de Avatares 2D Temporalmente Consistentes mediante Prior de Difusión de Vídeo

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    Make-Your-Anchor+ genera vídeos realistas estilo presentador a partir de un clip de un minuto. Este novedoso sistema crea avatares digitales con un movimiento preciso de cuerpo completo para diversas aplicaciones en línea.

    Palabras clave:
    generación de avataresdifusión de vídeomovimiento de cuerpo completoanimación 2DIA generativa

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    Área de la Ciencia:

    • Visión por Computadora
    • Inteligencia Artificial
    • Medios Digitales

    Sus antecedentes:

    • La generación de avatares realistas de cabeza parlante está establecida, pero la síntesis de movimiento de cuerpo completo sigue siendo un desafío importante.
    • Los métodos existentes a menudo requieren datos extensos o luchan con la coherencia temporal y la preservación de la identidad.

    Objetivo del estudio:

    • Presentar Make-Your-Anchor+, un sistema para la generación automática de vídeos estilo presentador con movimientos precisos de cuerpo completo.
    • Permitir la creación de avatares digitales a partir de una entrada mínima del usuario para creadores de contenido en línea.

    Principales métodos:

    • Ajuste fino de un modelo de difusión guiado por estructura en un vídeo de entrada de un minuto para renderizar condiciones de malla 3D en apariencias humanas.
    • Empleo de una estrategia de entrenamiento en dos etapas para el modelo de difusión, mapeando movimientos específicos a apariencias.
    • Adaptación de modelos de difusión cuadro a cuadro a pesos de difusión de vídeo preentrenados y utilización de un módulo de eliminación de ruido temporal superpuesto en lotes para la generación de vídeo extendida.
    • Incorporación de un módulo de mejora facial específico de la identidad para mejorar la calidad de la región facial.

    Principales resultados:

    • El sistema genera con éxito vídeos estilo presentador con movimientos precisos del torso y las manos.
    • Make-Your-Anchor+ demuestra una calidad visual superior, coherencia temporal y preservación de la identidad en comparación con los métodos de vanguardia.
    • El módulo propuesto de eliminación de ruido temporal evita eficazmente las restricciones de duración del vídeo durante la inferencia.

    Conclusiones:

    • Make-Your-Anchor+ ofrece una solución eficaz y eficiente para crear avatares digitales de alta calidad con movimiento de cuerpo completo.
    • El sistema tiene amplias aplicaciones para streamers en línea, presentadores de compras en vivo y presentadores virtuales.
    • Este trabajo avanza el estado del arte en IA generativa para la síntesis de movimiento humano realista.