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https://doi.org/10.31224/4859...
Article . 2025 . Peer-reviewed
License: CC BY
Data sources: Crossref
https://doi.org/10.2139/ssrn.5...
Article . 2025 . Peer-reviewed
Data sources: Crossref
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A Novel Hexagonal Photosite Grid

Authors: Sean Thompson;

A Novel Hexagonal Photosite Grid

Abstract

Digital imaging has long been dominated by the use of square-grid photodiode arrays overlaid with a Bayer Color Filter Array (CFA). While this configuration has proven effective, it possesses inherent limitations in quantum efficiency, color fidelity, and effective spatial resolution due to light loss from trench/walls and the need for inefficient demosaicing algorithms. This paper introduces a novel sensor architecture featuring a hexagonal honeycomb grid of photodiodes with a corresponding red, green, and blue color filter pattern. We present a theoretical analysis demonstrating the advantages of this hexagonal geometry. Our findings indicate that the hexagonal array offers superior packing density, leading to a higher area to perimeter ratio and a theoretical increase in light sensitivity. Furthermore, the sampling lattice of a hexagonal grid provides a more isotropic response and improved angular resolution under demosaicing, which results in more accurate color interpolation and a significant reduction in aliasing artifacts such as color moiré. We project that this architecture can achieve a higher modulation transfer function (MTF) for a given photodiode count compared to traditional Bayer sensors, ultimately leading to images with superior detail and color rendition, particularly in photon-limited conditions, as well as a higher effective dynamic range due to an increased neighborhood availability of red and blue color inputs versus a bayer sensor.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
hybrid