[Tex/LaTex] How to convert a png into pdf using LaTeX

graphicspaper-sizepdfpng

I have a larger png image: width is 5400 pixels and height is 3850 pixels. I need to transform it into a pdf file in SPA3 size, which means 320mm x 450mm. Is there a way to do it with LaTeX? What I think I need, is to be able to specify the paper size explicitly and to tell LaTeX that there should not be anything around the image.

Best Answer

You can use the standalone class which will produce a pdf with no border. If you want a small border you can add [border=<length>] class option.

Notes:

As LionelMANSUY mentioned in the comments it is usually preferable to use keepaspectratio, but if specific dimensions of both height and width are required, using `keepaspectratio may conflict with those requirements..

Code:

\documentclass{standalone}
\usepackage{graphicx}
\begin{document}
    \includegraphics[width=320mm,height=450mm]{../images/EiffelWide}
\end{document}

Related Solutions

[Tex/LaTex] Compile a LaTeX document into a PNG image that’s as short as possible

You can use the standalone class for this. It loads the preview package automatically to crop the resulting PDF to the content. This makes the usage of pdfcrop unnecessary.

Simply exchange the article class with standalone. (It uses article internally but another class can be specified using the class option.) Note that since v1.0 the default option has been changed from preview to crop. The latter is better for pictures etc. but doesn't support line breaks. Either select preview manually or use the varwidth option.

\documentclass[preview]{standalone}
\begin{document}
Hello. This is a test.
\begin{equation}
L = 2
\end{equation}
\end{document}

There is a border class option which sets the border around the content (the default is 0.5bp). This option excepts either one (border for all sides), two (left/right, top/bottom) or four values (left, bottom, right, top).

To convert it to a PNG I recommend to use the convert command of Image Magick:

pdflatex file
convert -density 300 file.pdf -quality 90 file.png

Here the density is 300 DPI which can be adapted to your needs. The quality setting selects the compression level and other things and 90 is AFAIK the optimum.

You can also select the DPI resolution for X and Y separately and also resize the resulting image, e.g.:

convert -density 600x600 file.pdf -quality 90 -resize 1080x800 file.png

Update 2011/12/21:

The new version 1.0 standalone now has the ability to call the above command line (and others) automatically, e.g.:

\documentclass[convert={density=300,size=1080x800,outext=.png}]{standalone}

or simply (using default setting 300dpi, no resizing, PNG):

\documentclass[convert]{standalone}

This needs the -shell-escape compiler option to allow the execution of the conversion program from within the LaTeX document.

[Tex/LaTex] Howto generate png images of characters using LaTeX

How about using dvipng.

\documentclass{minimal}
\newcount\n
\parindent=0pt
\begin{document}
\n=1
\loop\ifnum\n<256
        \char\n
        \advance\n by 1
        \newpage
\repeat
\char0
\end{document}

Then run latex l; dvipng l; mv l256.png l0.png

Obviously, this only solves part of the problem, but it should demonstrate how to handle the ones that can be done with dvi output.