Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2014 Jan 7;281(1774):20132209. doi: 10.1098/rspb.2013.2209

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© 2013 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/3.0/, which permits unrestricted use, provided the original author and source are credited.

PMC Copyright notice

Figure 6. — Discrimination thresholds for colours with UV peaks of different amplitude (a,b) in four visual systems: (1) VS pigment and V-OMT; (2a) VS pigment and UV-OMT; (2b) UVS pigment and V-OMT and (3) UVS pigment and UV-OMT. Thresholds requiring a 100% decrease of the UV peak were considered to represent the limit for no discrimination. (c) Examples of one narrow-banded (solid black line) and one broad-banded (solid grey line) stimulus with UV peaks at 340 nm illustrated with hypothetical amplitude differences at threshold (dashed black and dashed grey lines, respectively). For further explanations, see text.