graphicspdftex
I am working with .jpg images that are all B/W. Here is an example image I am using:
and here is what I am using to put the image into my document:
\begin{figure}[!htb]
\centering
\includegraphics[width=0.5\textwidth]{1980image}
\caption[Sample Caption]{Sample Caption}
\end{figure}
However, when I run, the image becomes entirely black. Here is a screenshot from my document:
Has anyone seen this before? Changing the filetype to .png does not fix anything.
The PGF package allows you to use a grayscale JPEG as a soft mask for your image.
Suppose you have a PNG with transparency called image.png. Then you can convert the picture to a colour JPEG using the ImageMagick command
convert image.png image.jpg
and extract the transparency mask to a grayscale JPEG using
convert image.png -alpha extract -colorspace GRAY -negate mask.jpg
Then you can include the image in your document using
\pgfdeclaremask{motormask}{mask.jpg}
\pgfimage[mask=motormask]{image.jpg}
\documentclass{article}
\usepackage{pgf}
\begin{document}
\pagecolor{cyan}
\begin{figure}\centering
\pgfdeclaremask{testmask}{mask.jpg}
\pgfimage[width=6cm, mask=testmask]{image.jpg}
\caption{Vroom!}
\end{figure}
\end{document}
File sizes:
PNG 690 KB
JPEG (image) 87 KB
JPEG (mask) 32 KB
PDF document 131 KB
The class you are using does
\setkeys{Gin}{width=\linewidth,totalheight=\textheight,keepaspectratio}
so all images are unconditionally scaled as large as possible to fit in the text block.
This is clearly an intentional choice of the publisher so if you are using a journal that mandates this class, that is just the way it is.
So scale is more or less disabled, but you can re-specify width to scale the image:
\documentclass[]{aiaa-tc}
\begin{document}
\begin{figure}
\includegraphics[width=.5\textwidth]{example-image}
\end{figure}
\begin{figure}
\includegraphics[width=.2\textwidth]{example-image}
\end{figure}
\begin{figure}
\includegraphics[width=0.1\textwidth]{example-image}
\end{figure}
\end{document}
Best Answer
I had the line
\usepackage[demo]{graphicx}. Removing the[demo]in this line fixed the problem.