The effects of smear on antiblooming protection and dynamic range of interline CCD image sensors

Stevens, Eric G.; Lee, Y.-R.; Burkey, B.C.

doi:10.1109/16.163449

Cited by 5 publications

(1 citation statement)

References 9 publications

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“…Its main cause is a lateral diffusion of charges between the photosensor and the CCD shift register, but it is also caused by light piping underneath or directly through the light shields that may cover these registers. [7][8][9] Although interpixel capacitance and smear are caused by different physical processes related to two different technology platforms (hybrid CMOS and CCD, respectively), they are jointly symbolized here by one coupling capacitance C c . In literature, however, C c is usually related to interpixel capacitance only.…”

Section: Sensor Interpixel Correlationmentioning

confidence: 99%

Sensor interpixel correlation analysis and reduction for color filter array high dynamic range image reconstruction

Lindstrand

2019

Color Research & Application

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High dynamic range imaging (HDRI) by bracketing of low dynamic range (LDR) images is demanding, as the sensor is deliberately operated at saturation. This exacerbates any crosstalk, interpixel capacitance, blooming and smear, all causing interpixel correlations (IC) and a deteriorated modulation transfer function (MTF). Established HDRI algorithms exclude saturated pixels, but generally overlook IC. This work presents a calibration method to estimate the affected region from saturated pixels for a color filter array (CFA) sensor, using the native CFA as a matched filter. The method minimizes color crosstalk given a set of candidates for proximity regions, and requires no special setup. Results are shown for a 21‐bit HDR output image with improved color fidelity and reduced noise. The calibration reduces IC in the LDR images and is performed only once for a given sensor. The improvement is applicable to any HDRI algorithm based on CFA image bracketing, irrespective of sensor technology. Generalizations to subsaturated and supersaturated pixels are described, facilitating a suggested irradiance‐exposure dependent point spread function charge repatriation strategy.

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Section: Sensor Interpixel Correlationmentioning

confidence: 99%

Sensor interpixel correlation analysis and reduction for color filter array high dynamic range image reconstruction

Lindstrand

2019

Color Research & Application

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Radiation temperature measuring method with high dynamic range via fast double-exposure image fusion

Zhang

et al. 2023

Infrared Physics & Technology

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From Photons to Bits

Khosla

1992

Physics Today

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There are many ways to record optical images. One might describe Paleolithic cave paintings as the earliest imaging technology. As significant as they probably were to those who made and lived with them, these depictions were limited by the artist's skill and time, and only persons who entered the cave could benefit from them. It was not until the coming of the printing press that a particular image could be made available to a wide audience. But even then one was still dependent on the artistic skill and subjective vision of the individual artist.

show abstract

The effects of smear on antiblooming protection and dynamic range of interline CCD image sensors

Cited by 5 publications

References 9 publications

Sensor interpixel correlation analysis and reduction for color filter array high dynamic range image reconstruction

Sensor interpixel correlation analysis and reduction for color filter array high dynamic range image reconstruction

Radiation temperature measuring method with high dynamic range via fast double-exposure image fusion

From Photons to Bits

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