Dynamic Range of Human Lightness Perception

Supplemental Material


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Individual observer's data: KJN

The tables below provide individual observer data for each condition/experiment the observer participated in as tab delimited text. For each experiment/condition we provide two data files.

The first table specifies the palette reflectance matched to each presented test on each trial. The format of this table is:

The second table contains the same data, but rearranged to make explicit the test luminances matched to each palette paper. These tables may be obtained from the first but are provided for convenience.

We provide also a figure showing model fit through the data as well as the response function for this observer for the experiment/condition s/he participated in.  Each figure consists of two subplots:


Experiment 2

Effect of contextual luminance range

        Reflectance matches for each test luminance

        Test luminance matches for each paper reflectance

        Model fit to the data and response functions:  Figure for observer KJN

Effect of overall contextual luminance

Reflectance matches for each test luminance

Test luminance matches for each paper reflectance

Model fit to the data and response functions

Effect of contextual luminance distribution

Reflectance matches for each test luminance

Test luminance matches for each paper reflectance

Model fit to the data and response functions: Figure for observer KJN