  In the fields of computer vision and natural language processing, multimodal
chart question-answering, especially involving color, structure, and textless
charts, poses significant challenges. Traditional methods, which typically
involve either direct multimodal processing or a table-to-text conversion
followed by language model analysis, have limitations in effectively handling
these complex scenarios. This paper introduces a novel multimodal chart
question-answering model, specifically designed to address these intricate
tasks. Our model integrates visual and linguistic processing, overcoming the
constraints of existing methods. We adopt a dual-phase training approach: the
initial phase focuses on aligning image and text representations, while the
subsequent phase concentrates on optimizing the model's interpretative and
analytical abilities in chart-related queries. This approach has demonstrated
superior performance on multiple public datasets, particularly in handling
color, structure, and textless chart questions, indicating its effectiveness in
complex multimodal tasks.
