DEMOSAIC | Linksium
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DEMOSAIC

Incubation

Giving colors to your sensors

profilePhoto   Pierre-Yves Perche
Linksium Contact Pierre-Yves Perche +33 (0)6 16 11 65 77 pierre-yves.perche@linksium.fr

Benefits

  • Consomption, speed
  • Resolution
  • Compatibility: RGB, RGB-W, RGB-Nir, CMYK, RGB-Panchromatique

Key words

  • Image sensor
  • Raw converter
  • Low light imaging
  • Multispectral Demosaicing

Intellectual Property

  • 3 patents
  • 3 software

Partnerships & Rewards

  • 2019 French Innovation Competition Winner

Laboratory

  • LPNC

Institutions

  • CNRS
  • UGA
  • USMB

Linksium Continuum

  • Maturation
  • Incubation

Context

Digital cameras have an image sensor overlaid with a mosaic of color filters which sample a single color per pixel. A reconstruction step is required to output the color image which has three color components per pixel, from an input image having only one.

Technology

The core of our demosaicing method is to consider a neighborhood of pixels in the RAW image from the sensor and calculate the appropriate weights between these pixels to best reconstruct the red, green and blue pixels of the color image. We build a physical model of the image formation on the sensor that we use to learn the inverse solution.

Advantages

Innovations in technology are:

  • Generic method that works for any sensor
  • Better pixel exploitation in terms of edge stitching and color accuracy even in low light
  • Reduced calculation time compared to other methods
  • Gain in consumption compared to competing methods

State of progress

We have a demonstrator in Matlab in the form of a Toolbox which has enabled us to compare the technology with other methods for improving quality (resolution, DeltaE, PSNR) and processing speed.

Applications

The products and services envisaged are:

  • RAW converter software to reconstruct color images from the RAW image
  • Filter transmission calculation software
  • Demosaicing bookstore

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