Here is the code for the following rendering
\headerbox{Experimental Results}{name=results,span=2,column=1,above=future}{
\begin{minipage}{\linewidth}
\centering
\captionof{table}{Inference on IR images using WaSR}
%\begin{table}[t]
\label{wasr_as_is_ir}
\setlength{\tabcolsep}{0.5\dp\strutbox} % the devious trick!
\begin{tabular}{@{} t @{\quad} ccc @{}}
{\parbox{20mm}{\raggedright Original IR images}} &
\includegraphics[width=40mm]{images/input/1603212920.750480_color_grayscale_resized_color.png} &
\includegraphics[width=40mm]{images/input/1603391732.530753_color_grayscale_resized_color.png} &
\includegraphics[width=40mm]{images/input/1603391799.096494_color_grayscale_resized_color.png} \\
{\parbox{20mm}{\raggedright Direct inference}} &
\includegraphics[width=40mm]{images/wasr_as_is/ir/1603212920.750480_color_grayscale_resized_color_output_mask.png} &
\includegraphics[width=40mm]{images/wasr_as_is/ir/1603391732.530753_color_grayscale_resized_color_output_mask.png} &
\includegraphics[width=40mm]{images/wasr_as_is/ir/1603391799.096494_color_grayscale_resized_color_output_mask.png} \\
{\parbox{20mm}{\raggedright Retrained with gray scale images}} &
\includegraphics[width=40mm]{images/wasr_with_mastr_rgb2gray_retrain/1603212920.750480_color_grayscale_resized_color_output_mask.png} &
\includegraphics[width=40mm]{images/wasr_with_mastr_rgb2gray_retrain/1603391732.530753_color_grayscale_resized_color_output_mask.png} &
\includegraphics[width=40mm]{images/wasr_with_mastr_rgb2gray_retrain/1603391799.096494_color_grayscale_resized_color_output_mask.png} \\
{\parbox{20mm}{\raggedright Retrained with IR images}} &
\includegraphics[width=40mm]{images/wasr_with_our_ir_retrain/1603212920.750480_color_grayscale_resized_color_output_mask.png} &
\includegraphics[width=40mm]{images/wasr_with_our_ir_retrain/1603391732.530753_color_grayscale_resized_color_output_mask.png} &
\includegraphics[width=40mm]{images/wasr_with_our_ir_retrain/1603391799.096494_color_grayscale_resized_color_output_mask.png} \\
\end{tabular}
%\end{table}
\end{minipage}
}
I tried with different size of parbox but it did not place the text correctly.
Update:: I failed to explain that I am creating A0 poster and creating a header box in it. So I cannot use table (float) environment in it. After incorporating js' suggestion, I am close but text is still an issue. See latest code below and the new result.
\begin{posterbox}[name=results,span=2,column=1,below=setup,above=future]{Results}
\begin{minipage}{\linewidth}
\centering
\captionof{table}{Inference on IR images using WaSR}
\label{wasr_as_is_ir}
\begin{tabular}{@{} p{1.1cm} @{\quad} ccc @{}}
{\multirow{-8}{*}{\makecell[l]{ Original \\IR images}}} &
\includegraphics[width=40mm]{images/input/1603212920.750480_color_grayscale_resized_color.png} &
\includegraphics[width=40mm]{images/input/1603391732.530753_color_grayscale_resized_color.png} &
\includegraphics[width=40mm]{images/input/1603391799.096494_color_grayscale_resized_color.png} \\
{\multirow{-8}{*}{\makecell[l]{Direct \\inference}}} &
\includegraphics[width=40mm]{images/wasr_as_is/ir/1603212920.750480_color_grayscale_resized_color_output_mask.png} &
\includegraphics[width=40mm]{images/wasr_as_is/ir/1603391732.530753_color_grayscale_resized_color_output_mask.png} &
\includegraphics[width=40mm]{images/wasr_as_is/ir/1603391799.096494_color_grayscale_resized_color_output_mask.png} \\
{\multirow{-8}{*}{\makecell[l]{Retrained \\with \\gray scale}}} &
\includegraphics[width=40mm]{images/wasr_with_mastr_rgb2gray_retrain/1603212920.750480_color_grayscale_resized_color_output_mask.png} &
\includegraphics[width=40mm]{images/wasr_with_mastr_rgb2gray_retrain/1603391732.530753_color_grayscale_resized_color_output_mask.png} &
\includegraphics[width=40mm]{images/wasr_with_mastr_rgb2gray_retrain/1603391799.096494_color_grayscale_resized_color_output_mask.png} \\
{\multirow{-8}{*}{\makecell[l]{Retrained \\with \\IR images}}} &
\includegraphics[width=40mm]{images/wasr_with_our_ir_retrain/1603212920.750480_color_grayscale_resized_color_output_mask.png} &
\includegraphics[width=40mm]{images/wasr_with_our_ir_retrain/1603391732.530753_color_grayscale_resized_color_output_mask.png} &
\includegraphics[width=40mm]{images/wasr_with_our_ir_retrain/1603391799.096494_color_grayscale_resized_color_output_mask.png} \\
\end{tabular}
%\end{table}
\end{minipage}
\end{posterbox}
The text is too close to the image cell. I do not know why! Any help in getting the text a little toward left will be much appreciated.
Update2:: Answer to @egreg. I am using minipage but the text is almost touching with the image. Here is my code -
\documentclass[a0paper,portrait,showframe]{baposter} \usepackage{calc} \usepackage{amsmath} \usepackage{amssymb} \usepackage{relsize} \usepackage{multirow} \usepackage{rotating} \usepackage{bm} \usepackage{url} \usepackage{enumitem}% for customizing the lists
\usepackage{graphicx} \usepackage{multicol}
\usepackage{palatino} \usepackage[font=small,labelfont=bf]{caption} \usepackage{textcomp} \usepackage{xcolor} \usepackage{amsmath,mathtools} \usepackage{amssymb} \usepackage{colortbl,booktabs} \usepackage{array,ragged2e} \usepackage{stfloats} \usepackage{fancyhdr} \usepackage{graphicx,subcaption,ragged2e} \usepackage{comment} \usepackage[export]{adjustbox} \usepackage{rotating} \usepackage{booktabs, makecell, tabularx} \usepackage{textcomp} % trademark symbol \usepackage{caption}
%%% Global Settings %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \graphicspath{{figures/}} % Root directory of the pictures \tracingstats=2 % Enabled LaTeX logging with conditionals %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % Save space in lists. Use this after the opening of the list %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \newcommand{\compresslist}{% \setlength{\itemsep}{1pt}% \setlength{\parskip}{0pt}% \setlength{\parsep}{0pt}% } %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%% Document Start %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \begin{document} \typeout{Poster rendering started} \definecolor{lightblue}{rgb}{0.145,0.6666,1} %%% General Poster Settings %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%% Eye Catcher, Title, Authors and University Images %%%%%%%%%%%%%%%%%%%%%% \begin{poster} % { % Poster Options % Show grid to help with alignment %grid=true, % Column spacing colspacing=1em, % Color style bgColorOne=white, bgColorTwo=white, borderColor=lightblue, headerColorOne=black, headerColorTwo=lightblue, headerFontColor=white, boxColorOne=white, boxColorTwo=lightblue, % Format of textbox textborder=roundedleft, % Format of text header %eyecatcher=false, headerborder=closed, headerheight=0.1\textheight, % a0 poster % textfont=\sc, An example of changing the text font headershape=roundedright, headershade=shadelr, headerfont=\Large\bf\textsc, %Sans Serif textfont={\setlength{\parindent}{1.5em}}, %a0 poster boxshade=plain, % background=shade-tb, background=plain, linewidth=2pt } % Eye Catcher { }
\begin{posterbox}[name=results,span=2,column=1,below=setup,above=bottom]{Results}
\begin{minipage}{\linewidth}
\centering
\captionof{table}{Inference on IR images using WaSR}
\label{wasr_as_is_ir}
\begin{tabular}{@{} p{1.1cm} @{\quad} ccc @{}}
{\multirow{-9}{}{\makecell[l]{ Original \IR images}}} &
\includegraphics[width=40mm]{images/input/1603212920.750480_color_grayscale_resized_color.png} &
\includegraphics[width=40mm]{images/input/1603391732.530753_color_grayscale_resized_color.png} &
\includegraphics[width=40mm]{images/input/1603391799.096494_color_grayscale_resized_color.png} \ \
{\multirow{-9}{}{\makecell[l]{Direct \inference}}} &
\includegraphics[width=40mm]{images/wasr_as_is/ir/1603212920.750480_color_grayscale_resized_color_output_mask.png} &
\includegraphics[width=40mm]{images/wasr_as_is/ir/1603391732.530753_color_grayscale_resized_color_output_mask.png} &
\includegraphics[width=40mm]{images/wasr_as_is/ir/1603391799.096494_color_grayscale_resized_color_output_mask.png} \ \
{\multirow{-9}{}{\makecell[l]{Retrained \with \gray scale}}} &
\includegraphics[width=40mm]{images/wasr_with_mastr_rgb2gray_retrain/1603212920.750480_color_grayscale_resized_color_output_mask.png} &
\includegraphics[width=40mm]{images/wasr_with_mastr_rgb2gray_retrain/1603391732.530753_color_grayscale_resized_color_output_mask.png} &
\includegraphics[width=40mm]{images/wasr_with_mastr_rgb2gray_retrain/1603391799.096494_color_grayscale_resized_color_output_mask.png} \ \
{\multirow{-9}{}{\makecell[l]{Retrained \with \IR images}}} &
\includegraphics[width=40mm]{images/wasr_with_our_ir_retrain/1603212920.750480_color_grayscale_resized_color_output_mask.png} &
\includegraphics[width=40mm]{images/wasr_with_our_ir_retrain/1603391732.530753_color_grayscale_resized_color_output_mask.png} &
\includegraphics[width=40mm]{images/wasr_with_our_ir_retrain/1603391799.096494_color_grayscale_resized_color_output_mask.png} \ \
\end{tabular}
\vspace{1cm}
\captionof{table}{Quantitative results}
\begin{tabular}{|c|c|} \hline
Precision & 0.4583 \ \hline
Recall & 0.9167 \ \hline
\end{tabular}
%\end{table}
\end{minipage}
\end{posterbox}
multirow
for centering and packagemakecell
for breaking the text