Cfrgtkky

With regards to this two questions Tikz - three pictures in two pages in landscape mode and Tikz - highlight text in an image, I struggle to put the given solutions together (which work otherwise fine for me) to highlight a part in picture A.

The context is that I have two pages (A4 in landscape mode) with three pictures on them, while one in the middle spane over both pages. Now I would like to highlight a part of the first picture, but fail to highlighted the desired part and have the rest reduced to an opaque black.

This is my code:

documentclass{article}

usepackage[margin=0cm, top=0cm, bottom=0cm, outer=0cm, inner=0cm, landscape, a4paper]{geometry}

pagestyle{empty}

usepackage{tikz}



begin{document}

begin{tikzpicture}[overlay,remember picture]

pgfmathsetmacro{mywidth}{2*paperwidth/3-1cm} % kept local

node at ([xshift=-paperwidth/6-1cm]current page.center){%

    includegraphics[width=mywidth pt,height=paperheight]{example-image-a}};

    begin{scope}[x={(image.south east)},y={(image.north west)}]

        fill[even odd rule,opacity=0.4]

        (0.11,0.4) -- (0.37,0.404) --  (0.37,0.414) -- (0.11,0.41) -- cycle

        (0,0) rectangle (1,1);

    end{scope}

node at (current page.east){%

    includegraphics[width=mywidth pt,height=paperheight]{example-image-b}};

end{tikzpicture}

~

clearpage

begin{tikzpicture}[overlay,remember picture]

pgfmathsetmacro{mywidth}{2*paperwidth/3-1cm} % kept local

node (image) at ([xshift=paperwidth/6+1cm]current page.center){%

    includegraphics[width=mywidth pt,height=paperheight]{example-image-c}};

node at (current page.west){%

    includegraphics[width=mywidth pt,height=paperheight]{example-image-b}};

end{tikzpicture}

end{document}

I presume that I do not manage to highlight parts of the image as it is not in a minipage environment. What can I do?

If I add the missing node name (image), I get

documentclass{article}

usepackage[margin=0cm, top=0cm, bottom=0cm, outer=0cm, inner=0cm, landscape, a4paper]{geometry}

pagestyle{empty}

usepackage{tikz}



begin{document}

begin{tikzpicture}[overlay,remember picture]

pgfmathsetmacro{mywidth}{2*paperwidth/3-1cm} % kept local

node (image) at ([xshift=-paperwidth/6-1cm]current page.center){%

    includegraphics[width=mywidth pt,height=paperheight]{example-image-a}};

    begin{scope}[x={(image.south east)},y={(image.north west)}]

        fill[even odd rule,opacity=0.4]

        (0.11,0.4) -- (0.37,0.404) --  (0.37,0.414) -- (0.11,0.41) -- cycle

        (0,0) rectangle (1,1);

    end{scope}

node at (current page.east){%

    includegraphics[width=mywidth pt,height=paperheight]{example-image-b}};

end{tikzpicture}

~

clearpage

begin{tikzpicture}[overlay,remember picture]

pgfmathsetmacro{mywidth}{2*paperwidth/3-1cm} % kept local

node (image) at ([xshift=paperwidth/6+1cm]current page.center){%

    includegraphics[width=mywidth pt,height=paperheight]{example-image-c}};

node at (current page.west){%

    includegraphics[width=mywidth pt,height=paperheight]{example-image-b}};

end{tikzpicture}

end{document}

As my crystal ball got stolen, I do not know if that's the part you wanted to highlight. ;-)