Color Constancy Theo Gevers Color in Computer Vision

  • Slides: 32
Download presentation
Color Constancy Theo Gevers Color in Computer Vision – 2019

Color Constancy Theo Gevers Color in Computer Vision – 2019

Color in Computer Vision – 2019

Color in Computer Vision – 2019

What is color constancy? Color in Computer Vision – 2019

What is color constancy? Color in Computer Vision – 2019

Effect of changes to illuminant Color in Computer Vision – 2019

Effect of changes to illuminant Color in Computer Vision – 2019

Color constancy framework Color in Computer Vision – 2019

Color constancy framework Color in Computer Vision – 2019

Color in Computer Vision – 2019

Color in Computer Vision – 2019

Illuminant Estimation Color in Computer Vision – 2019

Illuminant Estimation Color in Computer Vision – 2019

Adding a diffuse illumination component Color in Computer Vision – 2019

Adding a diffuse illumination component Color in Computer Vision – 2019

Challenges of color constancy Color in Computer Vision – 2019

Challenges of color constancy Color in Computer Vision – 2019

Chromatic adaptation Color in Computer Vision – 2019

Chromatic adaptation Color in Computer Vision – 2019

Chromatic Adaptation Transforms (CATs) based on sharpening cone responses Color in Computer Vision –

Chromatic Adaptation Transforms (CATs) based on sharpening cone responses Color in Computer Vision – 2019

Addition of an offset term Color in Computer Vision – 2019

Addition of an offset term Color in Computer Vision – 2019

Gray world assumption Color in Computer Vision – 2019

Gray world assumption Color in Computer Vision – 2019

Gray world assumption under Lambertian reflectance model Color in Computer Vision – 2019

Gray world assumption under Lambertian reflectance model Color in Computer Vision – 2019

Gray world assumption based on segmentation or semantic segmentation Color in Computer Vision –

Gray world assumption based on segmentation or semantic segmentation Color in Computer Vision – 2019

White patch assumption and max-RGB method Color in Computer Vision – 2019

White patch assumption and max-RGB method Color in Computer Vision – 2019

Illustration of max-RGB method Color in Computer Vision – 2019

Illustration of max-RGB method Color in Computer Vision – 2019

Incorporation of local smoothing and Minkowski metric in grayworld algorithm Color in Computer Vision

Incorporation of local smoothing and Minkowski metric in grayworld algorithm Color in Computer Vision – 2019

Color constancy based on the gray edge assumption Color in Computer Vision – 2019

Color constancy based on the gray edge assumption Color in Computer Vision – 2019

Representation in an opponent color space Color in Computer Vision – 2019

Representation in an opponent color space Color in Computer Vision – 2019

Illustration of gray edge model Color in Computer Vision – 2019

Illustration of gray edge model Color in Computer Vision – 2019

Interpretation of the Dichromatic Reflection Model (Review) Recall: Color in Computer Vision – 2019

Interpretation of the Dichromatic Reflection Model (Review) Recall: Color in Computer Vision – 2019

Illustration of the Dichromatic Reflection Model (Review) Color in Computer Vision – 2019

Illustration of the Dichromatic Reflection Model (Review) Color in Computer Vision – 2019

Physics-based approaches Color in Computer Vision – 2019

Physics-based approaches Color in Computer Vision – 2019

Color constancy using gamut-based methods Gevers et al cites the following paper as the

Color constancy using gamut-based methods Gevers et al cites the following paper as the original work on gamut-based methods for color constancy Color in Computer Vision – 2019

Steps for illuminant estimation based on the gamut Color in Computer Vision – 2019

Steps for illuminant estimation based on the gamut Color in Computer Vision – 2019

Color in Computer Vision – 2019

Color in Computer Vision – 2019

Gamut mapping of linear combinations of pixel values Color in Computer Vision – 2019

Gamut mapping of linear combinations of pixel values Color in Computer Vision – 2019

Equations referenced on preceding slide Color in Computer Vision – 2019

Equations referenced on preceding slide Color in Computer Vision – 2019

Extension to the offset model Color in Computer Vision – 2019

Extension to the offset model Color in Computer Vision – 2019

Use of image derivatives Color in Computer Vision – 2019

Use of image derivatives Color in Computer Vision – 2019

Illustration of use of image derivatives for gamut-based color constancy Color in Computer Vision

Illustration of use of image derivatives for gamut-based color constancy Color in Computer Vision – 2019