Yissum - Research Development Company of the Hebrew University

Dehazing using Color-Lines

Posted by Yissum - Research Development Company of the Hebrew UniversityResponsive · Innovative Products and Technologies · Israel

Summary of the technology

Dehazing using Color-Lines
Project ID : 10-2014-3005

Yissum - Research Development Company of the Hebrew University
Yissum - Research Development Company of the Hebrew University
Yissum - Research Development Company of the Hebrew University

Description of the technology

Color-lines used to recover scene transmission based on offset of lines from the origin


Computer Science & Engineering, Imaging / Computer Graphics

Development Stage

Research completed, method implemented and tested against

Patent Status

US patent application filed


  • Most image dehazing methods remove the layer of haze by recovering the direct scene radiance.
  • These methods rely on a physical image formation model that describes the hazy image as a combination between the scene radiance and the atmospheric light.
  • In the case of RGB images, the input image supplies only three of the four constraints required to produce optimum results and necessitate supplying additional information about the scene.
  • New method produces superior results without the need for additional inputs.

Our Innovation

New method for single-image dehazing that relies on a generic regularity in natural images

where pixels of small image patches typically exhibit a one-dimensional distribution in RGB color space, known as color-lines. Local image formation model uses the color-lines in hazy images to recover the scene transmission based on their offset from the origin.

Key Features

  • Algorithm validates its hypothesis and obtains more reliable transmission estimates where possible.
  • Unique pixel distribution predicted by model enables identification of patches not exhibiting proper color-lines and discards them.
  • Extensive evaluation of this method over different types of images and comparison to state-of-the-art methods over established benchmark images shows consistent improvement in the accuracy of the estimated scene transmission and recovered haze-free radiances.

Development Milestones

  • Real-time implementation on various platforms
  • Developing application specific user-interface

The Opportunity

  • Applications in long-distance photography
  • Airborne imaging
  • Satellite photography
  • Underwater photography
  • Security/Surveillance

Project manager

Eitan Dekel
VP Business Development - Computer Science

Project researchers

Raanan Fattal
HUJI, School of Computer Science and Engineering
CS - Computer Vision

Related keywords

  • Information Processing, Information System, Workflow Management
  • IT and Telematics Applications
  • Multimedia
  • Computers
  • Computer Graphics Related
  • Specialised Turnkey Systems
  • Scanning Related
  • Peripherals
  • Computer Services
  • Computer Software Market
  • Other Computer Related
  • Computer Science & Engineering
  • Imaging / Computer Graphics

About Yissum - Research Development Company of the Hebrew University

Technology Transfer Office from Israel

Yissum Research Development Company of the Hebrew University of Jerusalem Ltd. Founded in 1964 to protect and commercialize the Hebrew University’s intellectual property. Ranked among the top technology transfer companies, Yissum has registered over 8,900 patents covering 2,500 inventions; has licensed out 800 technologies and has spun-off 90 companies. Products that are based on Hebrew University technologies and were commercialized by Yissum generate today over $2 Billion in annual sales.

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