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Conference Papers Year : 2020

Semi-Gradient for Color Pixel Reconstruction in a RGBZ CMOS Sensor

Valentin Rebiere
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Antoine Drouot
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Bertrand Granado
Arnaud Bourge
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Abstract

In this paper, we introduce a novel color pixel reconstruction algorithm for a RGBZ CMOS imager. A RGBZ imager is a Vision System on Chip (VSoC) sensor that captures simultaneously color and depth information with a hybrid pixel matrix. The imager pattern is based on a Bayer filter array where the Z pixel covers an equivalent area of a 2x2-color-pixel size, and one quarter of the total color information is missing. We propose an original adaptive algorithm to reconstruct the color information using a new operator called semi-gradient. The results show improvements on edges, corners, and narrow lines reconstruction, and a reduction of color and structural artefacts compared to classical reconstruction algorithms.
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Dates and versions

hal-02981089 , version 1 (27-10-2020)
hal-02981089 , version 2 (17-12-2020)

Identifiers

Cite

Valentin Rebiere, Antoine Drouot, Bertrand Granado, Arnaud Bourge, Andrea Pinna. Semi-Gradient for Color Pixel Reconstruction in a RGBZ CMOS Sensor. IEEE Sensors 2020, Oct 2020, Rotterdam (virtual ), Netherlands. pp.1-4, ⟨10.1109/SENSORS47125.2020.9278887⟩. ⟨hal-02981089v2⟩
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