Cfrgtkky

The combination of the answers given by Herbert
and by Peter
worked for me, i.e. the following code:

documentclass{article}

usepackage[demo]{graphicx}



begin{document}



begin{figure}

   centering

   includegraphics{foo}  ...

   caption[Caption for LOF]{Real captionprotectfootnotemark}

end{figure}



footnotetext{blah blah blah}



end{document}

One solution:

begin{figure}

  begin{minipage}{textwidth}

    ...

    caption[Caption for LOF]%

      {Real captionfootnote{blah}}

  end{minipage}

end{figure}

See the UK TeX FAQ: Footnotes in captions

Best way to put the footnote on the same page of the figure:

usepackage{afterpage}



afterpage{

  begin{figure}

    begin{center}

      includegraphics[scale=0.75]{images/the_cited.png}

        caption[The LOF caption]{Lorem ipsum. tiny{Examplefootnotemark}}

    label{fig:cited_img}

    end{center}

  end{figure}

  footnotetext{Source: url{http://www.example.com/the_image.png}

}

Fonte: http://blog.peschla.net/2012/11/latex-footnotes-in-captions/

In all these answers, people are expecting the footnote to go at the bottom of the page. Sometimes, one wishes the footnote at the bottom of the table, if the footnote appears in the table. I have several ways of dealing with that, but here is one:

documentclass[12pt]{article}

parskip 1em

usepackage{boxhandler}

begin{document}



 Here is an example of a table with a footnote:

bxtable[ht]{Caption goes here}

{begin{tabular}{l}

%FIRST ROW OF OUTER TABULAR IS THE INNER TABLE

begin{tabular}{|l|c|c|}

hline

Title & Column 1 & Column 2\    hline

First Test & 1.234 & 5.389$^dag$\    hline

Second Test & 3.894 & 1.586~~\    hline

end{tabular}\    %SECOND ROW OF THE OUTER TABULAR IS THE FOOTNOTE

rule{0in}{1.2em}$^dag$scriptsize This is the footnote text\    end{tabular}

}



If you look at the form as defined in the .tex file, you will see

several things of note.  First, there is a tabular within a tabular.

The outer (first to begin, last to end) tabular uses a single column and

contains two ``rows.''  The first ``row'' is the inner tablular and the

second ``row'' is the footnote Next, we use the verb,dag, command for

the footnote symbol, but you can use any symbol you like.  I also added

two hard spaces after the 1.586 so that the column alignment wasn't

messed up by the dagger.  I used the rule command of 0 width and 1.2em

height to set the footnote offset below the table.  Making 1.2 a greater

number will increase the offset and vice versa.  Finally, you will note

that I used {scriptsizeverb,scriptsize,} to change the size of the

footnote text.  You could make it {footnotesizeverb,footnotesize,} or

even keep it the same size as the table {smallverb,small,}.



end{document}

To use the usual footnote command inside caption and obtain the usual foot notes at the end of page (not just inside the float as using minipages), you can use the package ftnxtra.

Note that in any case, if the float jump to the next page, the foot note will remain in the same place, so this is always a dangerous practice.

Another problem will be the bottom floats with footnote, since they are placed by default under the foot notes:

But this problem can be solved using the fnpos or stfloats packages:

documentclass{article}

usepackage{lipsum} % for dummy text

usepackage[demo]{graphicx}

usepackage{ftnxtra}

usepackage{fnpos} % makeFNbelow by default 

% or usepackage{stfloats} fnbelowfloat

begin{document}

lipsum[1-3]

begin{figure}[b]

centering

includegraphics[scale=.2]{image}

caption{A caption footnote{A footnote}}

label{label}

end{figure}

lipsum[1-2]

end{document}

For what it is worth, I simply used a protect and the regular footnote seemed to work OK.

As mentioned below, sometimes one wants the footnote under the table, rather that at page bottom. Here is the other way I do it

documentclass[12pt]{article}

usepackage{boxhandler}

begin{document}



This is an alternate way to do a footnote in a table, with the minipage

environment.

  bxtable[ht]{Caption goes here}

  {begin{minipage}{187.23183pt}   % GUESS (OR CALCULATE) MINIPAGE WIDTH

  renewcommandfootnoterule{}     % ELIMINATE LITTLE LINE SEPARATER

  begin{tabular}{|l|c|c|}

  hline

  Title & Column 1 & Column 2\      hline

  First Test & 1.234 & 5.389footnote{scriptsize This is the

   footnote text blah blah blah blahty blah}\      hline

  Second Test & 3.894 & 1.586~~\      hline

  end{tabular}

  vspace{-2ex}                    % SHIFT FOOTNOTE UP

  end{minipage}

  }

end{document}

I had the same issue with table floats. And the discussion here helped me :)

If you surround the float with a savenotes environment, then the snipped protectfootnote{foo} works. In some cases where the float is far off, you have to move the whole float in the source to the right place in text where the float mechanism of latex wants to put it. This is a job for the finalisation of a document and it is a workaround for the last open issue which is that the footnote sometimes does not appear on the right page.
So for me works:

begin{savenotes}

begin{table}[tb]

    begin{tabular}{...}

    ...

    end{tabular}

    caption{fooprotectfootnote{bar}}

end{table}

end{savenotes}

Someone should test this with figure floats.

The only way I could get this working, in my case, was using @Leo Liu's answer (in this same topic https://tex.stackexchange.com/a/10182/35364), plus this workaround to get footnote's numbering ok, for it was displaying a symbol, at first. I got something like this:

renewcommandthempfootnote{arabic{mpfootnote}} %so it will show numbers instead of symbols



begin{figure}

  begin{minipage}{textwidth}

  setcounter{mpfootnote}{1}  % sets footnote's starting number within this minipage to 1

    ...

    caption{Captionfootnotemark.}

    footnotetext{Foot notes}

  end{minipage}

end{figure}

This was the only way I was able to have image and footnote on the same page, with desired number. afterpage solution sent the whole image far away from expected, and the others gave me a footnote text on the page right before my image...

I use minipage, with protect before footnote. The footnote text appears right below the figure. This combines several solutions above, the result is quite simple and robust.

The optional argument of caption, viz., [Short caption] is needed if your document also contains a listoffigures instruction. If your document does not feature a List of Figures, you can omit the optional argument.

begin{figure}

    centering

    begin{minipage}{1.textwidth}

    %renewcommandfootnoterule{} % optional removing footnote bar

        centering

        includegraphics[width=.7linewidth]{somefile}

        caption[Short caption]{Full captionprotectfootnote{Some footnote text}.}

        label{fig:somefigure}

    end{minipage}

end{figure}

The first table in the documentation of the ctable package is a good example, having footnotes in the caption as well as in the table cells. Works for figures, too.