Area ‐preserving colour coding of inverse pole figure domain

Summary
The inverse pole figure (IPF) map is a routinely displayed output in microtexture studies, interpreted using the attached colour legend/diagram. An area‐preserving relation between the IPF domain and RGB colour domain has been developed here, and the resultant IPF colour diagrams of different crystal point group symmetries are presented.

Lay description
Spatial resolved characterisation of crystal orientation by Electron backscatter diffraction and Transmission electron microscopy techniques provide valuable insight into the microstructure of polycrystalline materials. The inverse pole figure (IPF) map is a routinely depicted result of microtexture experiments, wherein the crystal directions are represented through colours, and a colour legend diagram aids the user in interpreting the crystallographic direction of a colour pixel. Presently, different colour association schemes are being used, and the IPF maps are generally interpreted qualitatively. In this work, a quantitative colour association scheme between the crystal direction domain and the RGB colour space based on ‘Area‐preserving transformation’ has been developed for deducing the IPF colour diagrams of different crystal symmetries. The ‘Area‐preserving’ colour scheme gives uniform distribution of digital colours in the IPF colour key, and can produce a stochastic distribution of colours in a random textured sample.

Source: Journal of Microscopy - May 4, 2017 Category: Laboratory Medicine Authors: T. KARTHIKEYAN Tags: Hot Topic ‐ fast‐tracked short communication Source Type: research