The correlation of reproduction and recovery angular errors for similar and diverse scenes

Zakizadeh, Roshanak and Finlayson, Graham (2015) The correlation of reproduction and recovery angular errors for similar and diverse scenes. In: Final Program and Proceedings - IS and T/SID Color Imaging Conference. UNSPECIFIED, pp. 196-200.

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Illuminant estimation algorithms are usually evaluated by measuring the angular error between the RGB vectors of the estimated illuminant and the ground-truth illuminant (recovery angular error). However, the recovery angular error reports a wide range of errors for a given illuminant estimation algorithm and a given scene viewed under multiple lights (despite the fact that when the estimated lights are divided out the reproductions are similar). Following this observation, the reproduction angular error was proposed which instead measures the angle between the RGBs of a white surface being color corrected by dividing out the estimated illuminant RGB and R=1, G=1 and B=1 (i.e. white if the illuminant is correctly discounted). In this work we look at the correlation between the two metrics for each individual algorithm applied on a set of images. We observe that where the images are from the same scene under different illuminations the recovery and reproduction errors are often uncorrelated. Whereas when the same algorithm is applied on the images of diverse scenes the two errors are highly correlated.

Item Type: Book Section
Faculty \ School:
Faculty of Science > School of Computing Sciences
Faculty of Science
UEA Research Groups: Faculty of Science > Research Groups > Interactive Graphics and Audio
Faculty of Science > Research Groups > Colour and Imaging Lab
Related URLs:
Depositing User: Pure Connector
Date Deposited: 16 Feb 2016 11:06
Last Modified: 20 Apr 2023 01:09

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