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Optimal Daltonization by Spectral Shift for Dichromatic Vision

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This paper proposes a spectral-based image daltonization algorithm for the dichromats getting the best visibility against their color deficiencies. The proposed model extracts the visible and invisible spectra to dichromatic vsion based on the projection theory of spectral space to/from 2-D dichromatic cone space.. First, the fundamental spectra C* visible to the trichromats are captured from the conventional sRGB camera images by a pseudo-inverse projection.. Second, the fundamental spectra C*DIC visible to the dichromats are obtained by operating the extended matrix R DIC based on matrix-R theory. Thirdly, the lost spectra ΔC DIC are calculated as the difference between C* and C*DIC.

The key point in this paper is to make use of the lost spectra for image daltonization revived again. Though the lost spectra ΔC DIC are invisible to dichromats if left alone, they are shifted into the visible spectral region and added to the the fundamental spectra C* of source image. As a result, the dichromatic image visibility is dramatically improved.

The optimal spectral shift is determined to maximizing the spectral visibility for the dichromats and minimizing the visual gap from the normals. The proposed algorithm is designed to solve a contradictory demand to cope with both dichromats and normals.

The paper shows how the model works well for image daltonization better than the existing popular color blind simulators.
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Document Type: Research Article

Publication date: January 1, 2012

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  • CIC is the premier annual technical gathering for scientists, technologists, and engineers working in the areas of color science and systems, and their application to color imaging. Participants represent disciplines ranging from psychophysics, optical physics, image processing, color science to graphic arts, systems engineering, and hardware and software development. While a broad mix of professional interests is the hallmark of these conferences, the focus is color. CICs traditionally offer two days of short courses followed by three days of technical sessions that include three keynotes, an evening lecture, a vibrant interactive (poster) papers session, and workshops. An endearing symbol of the meeting is the Cactus Award, given each year to the author(s) of the best interactive paper; there are also Best Paper and Best Student Paper awards.

    Please note: for Purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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