Giter VIP home page Giter VIP logo

Comments (3)

LudwigFriedmann avatar LudwigFriedmann commented on August 16, 2024

Specular reflection could potentially be replaced by retro reflection using a binary flag (if true, light is directly reflected to the emitter). What seems to be more complex is diffuse reflection. How could this be modelled in the case of a retro-reflector?

It seems to be unrealistic to model this effect by geometry for camera or LIDAR. For larger wavelengths (e.g. radar), the problem may be solved by geometry...

from openmaterial.

ClemensLinnhoff avatar ClemensLinnhoff commented on August 16, 2024

Some insights: Retroreflectivity can apparently be quantified by

  • Coefficient of Retroreflectivity in cd/(lx m^2): Ratio of brightness to illuminance for specific entrance and observation angles
  • Retroreflective Efficiency in %: Percentage of light returned back towards its source by the retroreflector

(Source: http://www.egroupnet.com/3M/tss/minimumreflectivity/retroreflective.asp)

In Germany there are norms classifying traffic signs according to their coefficient of retroreflectivity in three classes: RA1 - RA3. Depending on the class, they can be used e.g. in parking lots, inner city or on the highway (highest class).
(Source: https://www.reflexfolie.de/glossar/reflexionsklassen-und-reflexfolienaufbau)

Values of the coefficient of retroreflectivity can also be found for license plates, e.g. here.

There is also measuring equipment for measure the coefficient of retroreflectivity. So at a first glance this seems to be more widely used than the retroreflective efficiency.

from openmaterial.

Related Issues (20)

Recommend Projects

  • React photo React

    A declarative, efficient, and flexible JavaScript library for building user interfaces.

  • Vue.js photo Vue.js

    🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.

  • Typescript photo Typescript

    TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

  • TensorFlow photo TensorFlow

    An Open Source Machine Learning Framework for Everyone

  • Django photo Django

    The Web framework for perfectionists with deadlines.

  • D3 photo D3

    Bring data to life with SVG, Canvas and HTML. 📊📈🎉

Recommend Topics

  • javascript

    JavaScript (JS) is a lightweight interpreted programming language with first-class functions.

  • web

    Some thing interesting about web. New door for the world.

  • server

    A server is a program made to process requests and deliver data to clients.

  • Machine learning

    Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.

  • Game

    Some thing interesting about game, make everyone happy.

Recommend Org

  • Facebook photo Facebook

    We are working to build community through open source technology. NB: members must have two-factor auth.

  • Microsoft photo Microsoft

    Open source projects and samples from Microsoft.

  • Google photo Google

    Google ❤️ Open Source for everyone.

  • D3 photo D3

    Data-Driven Documents codes.