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Learning to draw Fischer projections of molecules and understanding their relevance plays a crucial role in the visual depiction of organic molecules. A Fischer projection is a two-dimensional projection on a planar surface to simplify the three-dimensional wedge–dash representation of molecules. This is especially helpful in the case of molecules with multiple chiral centers that can be difficult to draw. Here, all the bonds of interest are represented as horizontal or vertical lines. While...
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Different notations are used to represent the three-dimensional structure of molecules on two-dimensional surfaces. One of the most commonly used representations is the dash-wedge formula. The dashed wedges, solid wedges, and the plane lines indicate the groups situated behind the plane, coming out of the plane, and in the plane, respectively.
The organic molecules rotate across the single bonds leading to numerous temporary three-dimensional structures of varying energy known as...
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Coordinates and Map Projections01:29

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Coordinates and map projections are essential tools in accurately representing the Earth's surface for various applications, ranging from navigation to spatial analysis. The latitude and longitude coordinate system is a universally recognized framework for defining locations. Latitude specifies the distance of a point north or south of the equator, measured in degrees from 0° at the equator to 90° at the poles. Longitude indicates a location's position east or west of the prime meridian,...
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Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...
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When we hold a stereotype about a person, we have expectations that he or she will fulfill that stereotype. A self-fulfilling prophecy is an expectation held by a person that alters his or her behavior in a way that tends to make it true. When we hold stereotypes about a person, we tend to treat the person according to our expectations. This treatment can influence the person to act according to our stereotypic expectations, thus confirming our stereotypic beliefs. Research by Rosenthal and...
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Updated: Feb 15, 2026

High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
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Perfilometría de proyección de franjas cifrada

Yang Cheng, Zichen Gui, Le Guan

    Optics letters
    |February 13, 2026
    PubMed
    Resumen
    Este resumen es generado por máquina.

    La perfilometría de proyección de franjas cifrada (E-FPP) integra el cifrado en las mediciones ópticas 3D. Este método que preserva la privacidad garantiza la reconstrucción 3D segura utilizando pares de claves únicos.

    Palabras clave:
    metrología ópticareconstrucción 3Dperfilometría de proyección de franjascifradoprivacidadseguridad de datosvisión por computadoracriptografía

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    Área de la Ciencia:

    • Metrología Óptica
    • Visión por Computadora
    • Criptografía

    Sus antecedentes:

    • La perfilometría de proyección de franjas (FPP) es una técnica clave para la medición de formas 3D.
    • Los métodos FPP existentes carecen de seguridad de datos y privacidad inherentes.
    • Es crucial proteger los datos 3D sensibles durante la metrología óptica.

    Objetivo del estudio:

    • Presentar un marco novedoso de perfilometría de proyección de franjas cifrada (E-FPP).
    • Permitir la reconstrucción 3D segura y que preserve la privacidad en la metrología óptica.
    • Desarrollar un sistema de código de fase co-clave para vincular la reconstrucción a claves autorizadas.

    Principales métodos:

    • Se desarrolló un marco de fase-código co-clave que integra el cifrado en el proceso de medición FPP.
    • Se utilizaron dos campos de fase aleatorios y códigos temporales ortogonales para la codificación conjunta.
    • Se conservó la secuencia operativa estándar de FPP de tres pasos.

    Principales resultados:

    • Se demostró una reconstrucción 3D precisa exclusivamente con pares de claves autorizados.
    • Se verificó una fuerte resistencia contra ataques de inferencia de fotogramas únicos y múltiples.
    • Se implementó con éxito la reconstrucción 3D dependiente de la clave.

    Conclusiones:

    • E-FPP ofrece una solución robusta y que preserva la privacidad para la metrología óptica.
    • El método propuesto mejora la seguridad de los datos sin comprometer la precisión de la medición.
    • Este marco avanza la adquisición segura de datos 3D en aplicaciones sensibles.