Graphics, Figures & Tables ⇒ Text and lines over a figure

[jhapk]

Hi,

I have a image like this:
http://arrow.utias.utoronto.ca/~jhapk/latex/image.jpg
and in my beamer presentation I want to change it to something like this.
http://arrow.utias.utoronto.ca/~jhapk/latex/image1.jpg
I want my lines and arrows to be very accurate and exact length that I want. I have been trying to read about and trying different packages - but I am not able to figure it out how to do it right.

Can someone tell me what is the right way to do it? And also if possible, a sample code I have been trying for last 6 hours

Thanks

[php1ic]

Have a look at the overpic package

http://www.ctan.org/tex-archive/macros/ ... b/overpic/

Using the image you linked as an example

Code: Select all

\documentclass[11pt,a4paper]{article}

\usepackage{xcolor}
\usepackage[percent]{overpic}


\begin{document}

\begin{figure}
\begin{overpic}[width=\textwidth]{image.jpg}
\put(30,50){\color{white}\rule{0.4\textwidth}{1pt}}
\put(30,50){\color{white}\rule{1pt}{30pt}}
\put(70,50){\color{white}\rule{1pt}{30pt}}
\put(50,45){\color{white}ABC}
\end{overpic}
\end{figure}

\end{document}

[jhapk]

Hi,

is it possible to add arrows using overpic?

I looked into the manuals, but didn't find nothing.

Thanks

[php1ic]

You can either use \vector or \line to create an arrow. The vector has a very small head, so a combination of lines may be better, as in the modified code below

Code: Select all

\documentclass[11pt,a4paper]{article}

\usepackage{xcolor}
\usepackage[percent]{overpic}


\begin{document}

\begin{figure}
\begin{overpic}[width=\textwidth]{image.jpg}
\put(30,50){\color{white}\rule{0.4\textwidth}{1pt}}
\put(30,50){\color{white}\rule{1pt}{30pt}}
\put(70,50){\color{white}\rule{1pt}{30pt}}
\put(50,45){\color{white}ABC}
\put(35,50){\color{white}\vector(0,-1){5}}
\put(40,50){\color{white}\line(0,-1){4}}
\put(40,46){\color{white}\line(-1,1){3}}
\put(40,46){\color{white}\line(1,1){3}}
\end{overpic}
\end{figure}

\end{document}

see this link for information about the \line and \vector command.
http://web.mit.edu/bdr/MacData/afs/dev/ ... x-257.html

[jhapk]

Hi,

thanks for the help. That helped. I am facing a weird issue with another figure. I have a figure:
http://arrow.utias.utoronto.ca/~jhapk/l ... iatour.jpg
and I want to modify it to something like
http://arrow.utias.utoronto.ca/~jhapk/l ... atour3.jpg

In my latex file I am using the following command

Code: Select all

    \begin{figure}
      \vspace*{-1.5ex}
      \hspace*{-1.5ex}
      \begin{overpic}[width=4.5in]{Fire_breathing_2_Luc_Viatour.jpg}
	\linethickness{2.25pt}	
	\put(16,44){\color{red}\line(1,1){8}}
	\put(19,41){\color{red}\line(1,1){8}}
	\put(28,50){\color{red}\line(-1,1){4}} %line number 3
	\put(19,41){\color{red}\line(-1,1){4}} %line number 4
	\put(4,60){\color{white}Stoichiometric mix}
	\put(53,60){\color{white}Fuel}
        \put(56,59){\color{white}\vector(2,-3){15.5}}
	\put(10,8){\color{white}Oxidizer (Air)}
	\put(12,58){\color{white}\vector(1,-1){10}}
	\put(34,36){\color{white}\vector(-1,1){10}}
      \end{overpic}
    \end{figure}

When I do this, I get the following result
http://arrow.utias.utoronto.ca/~jhapk/latex/result1.png

And if I change the line length in the above mentioned line number 3 and 4 to 3, I get the following warning

Code: Select all

LaTeX Warning: \oval, \circle, or \line size unavailable on input line 88.


LaTeX Warning: \oval, \circle, or \line size unavailable on input line 88.

and my result changes to
http://arrow.utias.utoronto.ca/~jhapk/latex/result2.png

Somehow my \linethickess command is not working and also there is some issue with smaller line lenghts. Any idea what is going wrong?

The documentclass is beamer

[php1ic]

Hi jhpak,

I had the same problem when I made the example I posted, which is why the arrow head is so large. However the minimum line length I could use was 3 and not 4?!.

I'm sorry, but I don't know how to solve this problem. Either create the smallest box you can and position it where you think it highlights the point the clearest, or try using some other shape to show the area, i.e. \circle, or if you have the time draw a Bezier curve to make an ellipse.

http://www.ursoswald.ch/LaTeXGraphics/p ... cture.html