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A Thermal Infrared Face Database With Facial Landmarks and Emotion Labels

DOI:10.1109/TIM.2018.2884364 期刊:IEEE Transactions on Instrumentation and Measurement 出版年份:2018 更新时间:2025-09-04 15:30:14
摘要: Thermal infrared imaging is an emerging modality that has gained increasing interest in recent years, mostly due to technical advances resulting in the availability of affordable microbolometer-based IR imaging sensors. However, while sensors are widely available, algorithms for thermal image processing still lack robustness and accuracy when compared to their RGB counterparts. Current methods developed for RGB data make use of machine learning algorithms that require large amounts of labeled images which are currently not available for the thermal domain. In this paper, we address the question whether providing a large number of labeled images would allow the application of current image processing methods on the example of solving challenging face analysis tasks. We introduce a high-resolution thermal facial image database with extensive manual annotations and explore how it can be used to adapt methods from the visual domain for infrared images. In addition, we extend existing approaches for infrared landmark detection with a head pose estimation for improved robustness and analyze the performance of a deep learning method on this task. An evaluation of algorithm performance shows that learning algorithms either outperform available solutions or allow completely new applications that could previously not be addressed. As a conclusion, we prove that investing the effort into acquiring appropriate training data and adapting competitive algorithms is not only a viable approach in analysing thermal infrared images but can also allow outperforming specific task-designed solutions. The database is freely available for academic use at https://github.com/marcinkopaczka/thermalfaceproject.
作者: Marcin Kopaczka,Raphael Kolk,Justus Schock,Felix Burkhard,Dorit Merhof
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To address the lack of labeled thermal infrared images for training machine learning algorithms in facial analysis tasks by introducing a high-resolution thermal facial image database with extensive manual annotations.

The study demonstrates that providing a large number of labeled thermal infrared images allows the application of current image processing methods to facial analysis tasks in the thermal domain. Learning-based approaches outperform algorithm-based methods in terms of robustness and accuracy. The database enables the training of advanced methods like deep learning for tasks such as facial landmark detection and expression recognition.

The database does not include images of persons wearing glasses or data from the visible spectrum, which may limit its applicability in scenarios requiring such data. Additionally, the database uses a thermally neutral backdrop, which may not reflect real-world conditions with unconstrained backgrounds.

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