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Minghao Wang

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4 papers

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AAAI Conference 2026 Conference Paper

Rethinking Bias in Generative Data Augmentation for Medical AI: A Frequency Recalibration Method

Chi Liu
Jincheng Liu
Congcong Zhu
Minghao Wang
Sheng Shen
Jia Gu
Tianqing Zhu
Wanlei Zhou

Developing Medical AI relies on large datasets and easily suffers from data scarcity. Generative data augmentation (GDA) using AI generative models offers a solution to synthesize realistic medical images. However, the bias in GDA is often underestimated in medical domains, with concerns about the risk of introducing detrimental features generated by AI and harming downstream tasks. This paper identifies the frequency misalignment between real and synthesized images as one of the key factors underlying unreliable GDA and proposes the Frequency Recalibration (FreRec) method to reduce the frequency distributional discrepancy and thus improve GDA. FreRec involves (1) Statistical High-frequency Replacement (SHR) to roughly align high-frequency components and (2) Reconstructive High-frequency Mapping (RHM) to enhance image quality and reconstruct high-frequency details. Extensive experiments were conducted in various medical datasets, including brain MRIs, chest X-rays, and fundus images. The results show that FreRec significantly improves downstream medical image classification performance compared to uncalibrated AI-synthesized samples. FreRec is a standalone post-processing step that is compatible with any generative model and can integrate seamlessly with common medical GDA pipelines.

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EAAI Journal 2025 Journal Article

A fruit fly-inspired path planning algorithm for unmanned aerial vehicle in underground environments based on low-discrepancy sequences

Huageng Zhong
Yu Du
Dong Liu
Minghao Wang
Ming Cong
Xiaojing Tian

Sampling planning algorithms are crucial in high-dimensional path planning for unmanned aerial vehicle (UAV), particularly in underground environments where Global Positioning System (GPS) signals are absent. The Rapidly-exploring Random Tree (RRT) algorithm, however, faces challenges due to the use of pseudo-random sequences, resulting in issues such as under-sampling, over-sampling, and they also suffer from high computational costs and redundant paths. To address these limitations, the (Halton-based Clustering) HBC-RRT algorithm is proposed. This algorithm utilizes the Halton sequence, replacing the pseudo-random sequence, which fundamentally resolves the problems of under-sampling and over-sampling in the RRT method. Additionally, a novel sampler is introduced, inspired by the fruit fly guidance mechanism, which optimizes the dual-tree sampling process by selecting either the optimal sampling candidate strategy or virtual sub-goal points. The optimal sampling candidate strategy conducts global sampling in three-dimensional space, effectively reducing sampling time. The virtual sub-goal points accelerate the dual-tree connection process, enhancing the directional guidance. The fruit fly mechanism reconstructs the path, leading to a reduction in UAV path costs. The performance of the HBC-RRT algorithm is evaluated through simulation experiments, demonstrating superior results in comparison to four baseline algorithms, including reductions in path length, convergence time, and memory usage. The practical applicability of the algorithm is further validated through real-world experiments involving a UAV and radar in an underground environment.

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AAAI Conference 2025 Conference Paper

Mental-Perceiver: Audio-Textual Multi-Modal Learning for Estimating Mental Disorders

Jinghui Qin
Changsong Liu
Tianchi Tang
Dahuang Liu
Minghao Wang
Qianying Huang
Rumin Zhang

Mental disorders, such as anxiety and depression, have become a global concern that affects people of all ages. Early detection and treatment are crucial to mitigate the negative effects these disorders can have on daily life. Although AI-based detection methods show promise, progress is hindered by the lack of publicly available large-scale datasets. To address this, we introduce the Multi-Modal Psychological assessment corpus (MMPsy), a large-scale dataset containing audio recordings and transcripts from Mandarin-speaking adolescents undergoing automated anxiety/depression assessment interviews. MMPsy also includes self-reported anxiety/depression evaluations using standardized psychological questionnaires. Leveraging this dataset, we propose Mental-Perceiver, a deep learning model for estimating mental disorders from audio and textual data. Extensive experiments on MMPsy and the DAIC-WOZ dataset demonstrate the effectiveness of Mental-Perceiver in anxiety and depression detection.

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EAAI Journal 2024 Journal Article

HB-RRT:A path planning algorithm for mobile robots using Halton sequence-based rapidly-exploring random tree

Huageng Zhong
Ming Cong
Minghao Wang
Yu Du
Dong Liu

Path planning remains crucial for efficient robot operation. A Halton Biased Rapidly-exploring Random Tree (HB-RRT) path planning algorithm is introduced in this study. The Halton sequence, known for its uniform distribution and low discrepancy, is employed for sampling. Issues arising from the pseudo-random sequence in the standard RRT algorithm, leading to uneven distribution of sampling points, are addressed. A mouse-inspired goal-oriented strategy and a candidate sampling pool strategy are incorporated to enhance the sampling point quality, thereby addressing the challenge of insufficient memory during node expansion. Path optimization is further achieved through a multi-level planning approach, which aims to minimize redundancy. A subsequent smoothing of the path is conducted using a cubic B-spline method. Comparisons with the RRT, Bionic Target Bias-RRT, and Informed-RRT* algorithms, through both numerical simulations and real-world testing, confirm the superiority of the HB-RRT algorithm in terms of planning time, path length, and overall path quality.

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