\documentclass{article}
\usepackage[landscape]{geometry}
\usepackage{pdfbase}
\usepackage{graphicx}
\begin{document}
\sbox0{\includegraphics[width=1in,height=0.75in]{example-image}}%
\ExplSyntaxOn
\leavevmode\pbs_pdfxform:nnnnn{}{0}{}{}{0} % for reffing in streams, wrong here (appearance use)
Button:\pbs_pdfannot:nnnn{1in}{0.75in}{0pt}{
/Subtype/Widget
/Ft/Btn/Ff~65537/T~(myButtonWidget0)
/AP<</N~\pbs_pdflastxform:>>
}
\ExplSyntaxOff
\vspace{2in}
\sbox0{\includegraphics[width=1in,height=0.75in]{example-image}}%