# When I include graphics , I get a very bad quality due to scaling?

When I use scale=0.3 I get a low quality images, Is this normal ? is there a way to avoid that ?

\documentclass[11pt,a4paper]{beamer}
\usepackage{graphicx}

\begin{frame}
\frametitle{A m a title}

\begin{figure}[hT]
\includegraphics[scale=0.360]{imgs/classical.png}
\end{figure}
\end{frame}
\end{document}

• Well, this depends on the quality of the original figure file as well, I would say. png is no vector graphics format, so scaling is always an issue then – user31729 May 31 '16 at 18:01
• so it is better that I export my images in svg ? – user39755 May 31 '16 at 18:04
• .png files are bitmaps, and don't scale well. if you can get a vector graphics file, that would be preferable. otherwise, if there is any way you can get the file directly at the size you want to use it, that would give much better results. (but it would still scale poorly for someone changing the magnification on a .pdf file while viewing it.) – barbara beeton May 31 '16 at 18:04
• @Ojiryx: No, use .pdf or .eps and convert to .pdf then, but see barbara beeton's comment as well – user31729 May 31 '16 at 18:07
• Define low quality, bitmap is usually not a problem when you scale down from a good quality starting point. So if your png is bad quality to begin with... – daleif May 31 '16 at 19:43

.png files are bitmaps, and don't scale well. if you can get a vector graphics file, that would be preferable.
as suggested by christian hupfer, a .pdf file (or .eps file converted to pdf) is best, since it is in the same format as the output file you are producing.
if you must use a bitmap file, try to get the file at exactly the size you intend to use it; that would give much better results. (but it would still scale poorly for someone changing the magnification on a .pdf file while viewing it.)