Psychtoolbox-3

Psychophysics Toolbox Version 3 (PTB-3) is an open-source set of Matlab and GNU Octave functions for vision and neuroscience research. It makes it easy to synthesize and show accurately controlled visual and auditory stimuli and interact with the observer. Some of its functionality is available as part of Python toolkits like PsychoPy. For licenses, commercial support and services visit psychtoolbox.net. Follow us on Mastodon, BlueSky, or Twitter @psychtoolbox

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TransmissionToOD

>Psychtoolbox>PsychColorimetricData

Convert transmission to optical density

Synopsis:
density = TransmissionToOD(transmission)

Description
As its name says. Handy not to have to remember the formula.
Converts all entries of its argument.

Path   Retrieve current version from GitHub | View changelog
Psychtoolbox/PsychColorimetricData/TransmissionToOD.m

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Last updated on August 13, 2026