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Radiometric Response Function

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Computer Vision
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Synonyms

Camera response function

Related Concepts

Radiance; Radiometric Calibration; Vignetting

Definition

Radiometric response function is a function that transforms sensor irradiance into measured intensities that are the output from the camera.

Background

In most cameras, there exists a radiometric response function that relates sensor irradiance to measured intensity values. The radiometric response functions are typically nonlinear. This nonlinearity is intentionally designed by camera manufacturers for purposes such as compressing the dynamic range of scene brightness or to take into account the nonlinear mapping of display systems.

While many computer vision algorithms assume a linear (or affine) relationship between the sensor irradiance and the measured image intensity, the radiometric response functions are typically unknown, and these vary with camera parameter settings. Therefore, it is important to estimate the response function to linearize the measured image intensity...

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References

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Matsushita, Y. (2014). Radiometric Response Function. In: Ikeuchi, K. (eds) Computer Vision. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-31439-6_521

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