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Retinex

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Name

Retinex

Software

ImageJ

Author

Francisco Jiménez Hernández

Maintainer

Francisco Jiménez Hernández

Source

on GitHub

Status
Category

Plugins


Retinex

Retinex filtering is based on Land’s theory of image perception, proposed to explain the perceived colour constancy of objects under varying illumination conditions. Several approaches exist to implement the retinex principles, among these the multiscale retinex with colour restoration algorithm (MSRCR) combines colour constancy with local contrast enhancement so images are rendered similarly to how human vision is believed to operate.

Usage

Level
specifies distribution of the Gaussian blurring kernel sizes for Scale division values > 2:

Uniform
tends to treat all image intensities similarly,

Low
enhances dark regions of the image,

High
enhances the bright regions of the image.

Scale
specifies the depth of the retinex effect.

Scale division
specifies the number of iterations of the multiscale filter. Values larger than 2 exploit the “multiscale” nature of the algorithm.

Dynamic
adjusts the colour of the result. Large values produce less saturated images..

Example

Original:

After Retinex (default parameters):

Homepage

Please find the original page for the Retinex plugin here.