Simplified measurement of point spread functions of hyperspectral cameras for assessment of spatial coregistration

Skauli, T.; Torkildsen, Hans Erling

doi:10.1117/12.2520219

Cited by 4 publications

(5 citation statements)

References 4 publications

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“…However, most users of the standard will then need to establish new measurement setups and data processing, and the measurement time may be too long for some use cases. To simplify the measurement, it has earlier been proposed to perform just two orthogonal scans and approximate the SPSF by the product of the two LSFs [3]. It is foreseen that the P4001 standard will allow this simplified measurement.…”

Section: Measurement Principlementioning

confidence: 99%

“…The method used in [3] for measuring spatial coregistration is based on a metric investigated in [7], essentially the volume between two normalized PSFs. For two bands with indices m and n, the spatial coregistration error metric Ɛxy is given as an integral of the difference over the image plane:…”

Section: Coregistration Error Matrixmentioning

confidence: 99%

“…Clearly, the difference in mean coregistration error could also be the other way, depending on the SPSF shape. It is well recognized [3] that the simplified measurement can be inaccurate, in principle severely so in pathological cases, but it still represents a significant improvement over the present state of the art. It can be noted that in [3], the simplified measurement yielded slightly smaller values for the error compared to the full 2D result, but still within 10%.…”

Section: Coregistration Error Matrixmentioning

confidence: 99%

“…It is well recognized [3] that the simplified measurement can be inaccurate, in principle severely so in pathological cases, but it still represents a significant improvement over the present state of the art. It can be noted that in [3], the simplified measurement yielded slightly smaller values for the error compared to the full 2D result, but still within 10%. A possible takeaway for the P4001 standard development is that the simplified measurement should not be mandated exclusively, and that a full 2D measurement of SPSF should be permitted for camera characterization: It can be seen as unreasonable to require a simplified measurement technique which can yield a poorer value than a full 2D measurement.…”

Section: Coregistration Error Matrixmentioning

confidence: 99%

See 3 more Smart Citations

Imaging the point spread function of hyperspectral cameras: the full truth about coregistration error and resolution

Selnesaunet,

Henriksen,

Skauli

2023

Imaging Spectrometry XXVI: Applications, Sensors, and Processing

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In hyperspectral imaging, the integrity of the spectral signal is critical in order to satisfy the requirements inherent in spectral image processing. There is a need to establish methods for measuring and quantifying band-to-band coregistration errors in the point spread function, as a supplement to customary resolution specifications. The IEEE P4001 working group is creating a standard for hyperspectral imaging which will include metrics for such imperfections. In this work, we discuss a measurement technique that characterizes a hyperspectral camera by creating an image of the point spread function in each band, building on earlier results [

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Section: Measurement Principlementioning

confidence: 99%

Section: Coregistration Error Matrixmentioning

confidence: 99%

Section: Coregistration Error Matrixmentioning

confidence: 99%

Section: Coregistration Error Matrixmentioning

confidence: 99%

See 2 more Smart Citations

Imaging the point spread function of hyperspectral cameras: the full truth about coregistration error and resolution

Selnesaunet,

Henriksen,

Skauli

2023

Imaging Spectrometry XXVI: Applications, Sensors, and Processing

Self Cite

View full text Add to dashboard Cite

show abstract

“…According to the standard, the SPSF of a pixel can be approximated by a product of the sampling line spread functions (SLSF) of the pixel in orthogonal x and y directions [2,6]. For a pushbroom camera, the orthogonal directions are across track (x) and along track (y).…”

Section: Introductionmentioning

confidence: 99%

Validating spatial resolution measurement techniques in pushbroom hyperspectral cameras according to upcoming IEEE P4001 standard

Borovkova,

Kataja,

Holma

2024

Optical Instrument Science, Technology, and Applications III

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The upcoming IEEE standard P4001 outlines a set of parameters for characterizing the performance of hyperspectral cameras along with recommended measurement procedures. This study concentrates on validating a simplified approach to measure the across-track spatial resolution of a pushbroom hyperspectral camera with a sensor sampling factor of two or higher, in comparison to the scanning-based approach described in the standard. The findings indicate that the snapshot-based method produces values for the width of the sampling line spread function in the across-track direction that closely match those obtained through scanning with sub-pixel steps for hyperspectral cameras with a sensor sampling factor of two or higher.

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A New Methodology to Assess Spatial Response Models for Satellite Imagers Using the Optical Design Parameters of a Generic Sensor as Independent Variables

Valenzuela

Reinke

Jones

2023

IEEE Trans. Geosci. Remote Sensing

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Simplified measurement of point spread functions of hyperspectral cameras for assessment of spatial coregistration

Cited by 4 publications

References 4 publications

Imaging the point spread function of hyperspectral cameras: the full truth about coregistration error and resolution

Imaging the point spread function of hyperspectral cameras: the full truth about coregistration error and resolution

Validating spatial resolution measurement techniques in pushbroom hyperspectral cameras according to upcoming IEEE P4001 standard

A New Methodology to Assess Spatial Response Models for Satellite Imagers Using the Optical Design Parameters of a Generic Sensor as Independent Variables

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