Face recognition systems classically recognize people individually. When presented with a group p... more Face recognition systems classically recognize people individually. When presented with a group photograph containing multiple people, such systems implicitly assume statistical independence between each detected face. We question this basic assumption and consider instead that there is a dependence between face regions from the same image; after all, the image was acquired with a single camera, under consistent lighting (distribution, direction, spectrum), camera motion, and scene/camera geometry. Such naturally occurring commonalities between face images can be exploited when recognition decisions are made jointly across the faces, rather than independently. Furthermore, when recognizing people in isolation, some features such as color are usually uninformative in unconstrained settings. But by considering pairs of people, the relative color difference provides valuable information. This paper reconsiders the independence assumption, introduces new features and methods for recogni...
We design and implement a comprehensive study of the perception of gloss. This is the largest stu... more We design and implement a comprehensive study of the perception of gloss. This is the largest study of its kind to date, and the first to use real material measurements. In addition, we develop a novel multi-dimensional scaling (MDS) algorithm for analyzing pairwise comparisons. The data from the psychophysics study and the MDS algorithm is used to construct a low dimensional perceptual embedding of these bidirectional reflectance distribution functions (BRDFs). The embedding is validated by correlating it with nine gloss dimensions, fitted parameters of seven analytical BRDF models, and a perceptual parameterization of Ward's model. We also introduce a novel perceptual interpolation scheme that uses the embedding to provide the user with an intuitive interface for navigating the space of gloss and constructing new materials.
The following code generates area-normalized calcification, macrobioerosion, and microbioerosion ... more The following code generates area-normalized calcification, macrobioerosion, and microbioerosion rates from ReefBudget methodologies (http://geography.exeter.ac.uk/reefbudget/; Perry et al., 2018; Perry and Lange 2019) for use with CoralNet image identification labels to support the integration of estimated carbonate production rates with CoralNet, an automated benthic image analysis platform (https://coralnet.ucsd.edu/; Beijbom et al., 2015). The default rates include calcification, macrobioerosion, and microbioerosion to be consistent with ReefBudget methodologies, but the include_bioerosion argument can be set to FALSE at the beginning of the script to calculate the carbonate production rate data sheet without any sources of bioerosion. Because these rates have been adapted for CoralNet benthic image labels, the included estimates do not account for mobile sources of parrotfish or urchin bioerosion that are included in the complete ReefBudget methodologies. Calcification and bioerosion rates have been developed separately for the Indo-Pacific and Atlantic regions following the below methodologies and data sources. Please cite the following data release for use of the area-normalized calcification and bioerosion rates as follows: Courtney TA, Chan S, Lange ID, Perry CT, Kriegman DJ, Andersson AJ (2021) Area-normalized scaling of ReefBudget calcification, macrobioerosion, and microbioerosion rates for use with CoralNet Version 1.0 https://doi.org/10.5281/zenodo.5140477 References: Beijbom O, Edmunds PJ, Roelfsema C, Smith J, Kline DI, Neal BP, Dunlap MJ, Moriarty V, Fan T-Y, Tan C-J, Chan S, Treibitz T, Gamst A, Mitchell BG, Kriegman D (2015) Towards Automated Annotation of Benthic Survey Images: Variability of Human Experts and Operational Modes of Automation. PLoS ONE 10(7): e0130312. Perry CT, Lange I, Januchowski-Hartley FA (2018) ReefBudget Indo Pacific: online resource and methodology. Retrieved from http://geography.exeter.ac.uk/reefbudget/ Perry CT and Lange ID (2019) ReefBudget Caribbean v2: online reso [...]
Face recognition systems classically recognize people individually. When presented with a group p... more Face recognition systems classically recognize people individually. When presented with a group photograph containing multiple people, such systems implicitly assume statistical independence between each detected face. We question this basic assumption and consider instead that there is a dependence between face regions from the same image; after all, the image was acquired with a single camera, under consistent lighting (distribution, direction, spectrum), camera motion, and scene/camera geometry. Such naturally occurring commonalities between face images can be exploited when recognition decisions are made jointly across the faces, rather than independently. Furthermore, when recognizing people in isolation, some features such as color are usually uninformative in unconstrained settings. But by considering pairs of people, the relative color difference provides valuable information. This paper reconsiders the independence assumption, introduces new features and methods for recogni...
We design and implement a comprehensive study of the perception of gloss. This is the largest stu... more We design and implement a comprehensive study of the perception of gloss. This is the largest study of its kind to date, and the first to use real material measurements. In addition, we develop a novel multi-dimensional scaling (MDS) algorithm for analyzing pairwise comparisons. The data from the psychophysics study and the MDS algorithm is used to construct a low dimensional perceptual embedding of these bidirectional reflectance distribution functions (BRDFs). The embedding is validated by correlating it with nine gloss dimensions, fitted parameters of seven analytical BRDF models, and a perceptual parameterization of Ward's model. We also introduce a novel perceptual interpolation scheme that uses the embedding to provide the user with an intuitive interface for navigating the space of gloss and constructing new materials.
The following code generates area-normalized calcification, macrobioerosion, and microbioerosion ... more The following code generates area-normalized calcification, macrobioerosion, and microbioerosion rates from ReefBudget methodologies (http://geography.exeter.ac.uk/reefbudget/; Perry et al., 2018; Perry and Lange 2019) for use with CoralNet image identification labels to support the integration of estimated carbonate production rates with CoralNet, an automated benthic image analysis platform (https://coralnet.ucsd.edu/; Beijbom et al., 2015). The default rates include calcification, macrobioerosion, and microbioerosion to be consistent with ReefBudget methodologies, but the include_bioerosion argument can be set to FALSE at the beginning of the script to calculate the carbonate production rate data sheet without any sources of bioerosion. Because these rates have been adapted for CoralNet benthic image labels, the included estimates do not account for mobile sources of parrotfish or urchin bioerosion that are included in the complete ReefBudget methodologies. Calcification and bioerosion rates have been developed separately for the Indo-Pacific and Atlantic regions following the below methodologies and data sources. Please cite the following data release for use of the area-normalized calcification and bioerosion rates as follows: Courtney TA, Chan S, Lange ID, Perry CT, Kriegman DJ, Andersson AJ (2021) Area-normalized scaling of ReefBudget calcification, macrobioerosion, and microbioerosion rates for use with CoralNet Version 1.0 https://doi.org/10.5281/zenodo.5140477 References: Beijbom O, Edmunds PJ, Roelfsema C, Smith J, Kline DI, Neal BP, Dunlap MJ, Moriarty V, Fan T-Y, Tan C-J, Chan S, Treibitz T, Gamst A, Mitchell BG, Kriegman D (2015) Towards Automated Annotation of Benthic Survey Images: Variability of Human Experts and Operational Modes of Automation. PLoS ONE 10(7): e0130312. Perry CT, Lange I, Januchowski-Hartley FA (2018) ReefBudget Indo Pacific: online resource and methodology. Retrieved from http://geography.exeter.ac.uk/reefbudget/ Perry CT and Lange ID (2019) ReefBudget Caribbean v2: online reso [...]
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