dmcdougall
diff --git a/‎best-practices/pchesapeake.png‎
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diff --git a/‎best-practices/pjetnoise.png‎
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diff --git a/‎best-practices/pmagfield.png‎
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diff --git a/‎best-practices/pmri.png‎
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diff --git a/‎best-practices/psinc.png‎
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diff --git a/‎best-practices/talk.tex‎
Lines changed: 76 additions & 11 deletions b/‎best-practices/talk.tex‎
Lines changed: 76 additions & 11 deletions
@@ -59,18 +59,8 @@
   \titlepage
 \end{frame}
 
-\begin{frame}{Overview}
-  \begin{enumerate}
-    \item Introduction
-    \item Hating on the jet colourmap
-    \item ITEM 2
-    \item ITEM 3
-    \item ITEM 4
-  \end{enumerate}
-\end{frame}
-
 \begin{frame}{Introduction}
-  Most of the content is taking from this excellent article:
+  Most of the content is taken from this excellent article:
   \linebreak
   \linebreak
   \textcolor{blue}{\small{\url{http://www.research.ibm.com/people/l/lloydt/color/color.HTM}}}
@@ -143,9 +133,84 @@
   \end{figure}
 \end{frame}
 
+\begin{frame}{What have we learned?}
+  \begin{itemize}
+    \item Jet is not a great colourmap (or is it?)
+    \item Two types of information one can glean from a colourmap\footnote{C.
+      Ware, Color sequences for univariate maps: theory, experiments, and
+      principles, IEEE Computer Graphics and Appliations, 1998.}
+      \begin{itemize}
+        \item `Value' or `metric' information
+        \item `Form' or `structure' information
+      \end{itemize}
+    \item Jet is not bad for value information (but not everywhere)
+    \item Jet is awful for form information
+    \item Jet is not alone---but it is very commonly used (see K Thyng's talk)
+    \item How to pick a good colour map?  \textbf{It depends!}
+  \end{itemize}
+\end{frame}
+
+\begin{frame}{What is good for form/structure information?}
+  \begin{itemize}
+    \item Colour has 3 dimensions: hue, saturation, and luminance
+    \item Saturation-varying colourmaps are good for low-frequency data
+    \item Luminance-varying colourmaps are good for high-frequency data
+    \item The human brain is very bad an interpolating hue\footnote{Conclusion
+      from psychophysical experiments by S. S. Stevens (formerly at Harvard)}
+    \item Perceptually-based colourmaps
+      \begin{itemize}
+        \item Equal steps in data are perceived as equal steps in the colour
+          space
+      \end{itemize}
+  \end{itemize}
+\end{frame}
+
+\begin{frame}{Perceptually-based colourmaps}
+  % Top-left is jet
+  % Top-right is perceptual for HF
+  % Bottom-left is perceptual for LF
+  % Bottom-right tried to encompass both HF and LF
+  \begin{figure}[htp]
+    \includegraphics[scale=7.0]{perceptual1.jpg}
+  \end{figure}
+\end{frame}
+
+\begin{frame}{Perceptually-based colourmaps}
+  \begin{figure}[htp]
+    \includegraphics[scale=0.55]{pchesapeake.png}
+  \end{figure}
+\end{frame}
+
+\begin{frame}{Perceptually-based colourmaps}
+  \begin{figure}[htp]
+    \includegraphics[scale=0.55]{pmri.png}
+  \end{figure}
+\end{frame}
+
+\begin{frame}{Perceptually-based colourmaps}
+  \begin{figure}[htp]
+    \includegraphics[scale=0.55]{pjetnoise.png}
+  \end{figure}
+\end{frame}
+
+\begin{frame}{Perceptually-based colourmaps}
+  \begin{figure}[htp]
+    \includegraphics[scale=0.55]{pmagfield.png}
+  \end{figure}
+\end{frame}
+
+\begin{frame}{Perceptually-based colourmaps}
+  \begin{figure}[htp]
+    \includegraphics[scale=0.55]{psinc.png}
+  \end{figure}
+\end{frame}
+
 \begin{frame}
   \begin{center}
     Thank you.
+    \linebreak
+    \linebreak
+    Pssst.  Jet is the default colourmap in matplotlib.  Anybody want to fix it?  Submit a PR!
   \end{center}
 \end{frame}