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Capturing Ground Truth Super-Resolution Data

Konferenzbeitrag

Links:
Autoren:

Chengchao Qu
Ding Luo
Eduardo Monari
Tobias Schuchert
Jürgen Beyerer

Quelle:

Proceedings of the 23rd IEEE International Conference on Image Processing (ICIP), IEEE, 2016.

Konferenz:

23rd IEEE International Conference on Image Processing (ICIP), Phoenix, Arizona, USA, 25.-28. September 2016

Super-resolution (SR) offers an effective approach to boost quality and details of low-resolution (LR) images to obtain high-resolution (HR) images. Despite the theoretical and technical advances in the past decades, it still lacks plausible methodology to evaluate and compare different SR algorithms. The main cause to this problem lies in the missing ground truth data for SR. Unlike in many other computer vision tasks, where existing image datasets can be utilized directly, or with a little extra annotation work, evaluating SR requires that the dataset contain both LR and the corresponding HR ground truth images of the same scene captured at the same time. This work presents a novel prototype camera system to address the aforementioned difficulties of acquiring ground truth SR data. Two identical camera sensors equipped with a wide-angle lens and a telephoto lens respectively, share the same optical axis by placing a beam splitter in the optical path. The back-end program can then trigger their shutters simultaneously and precisely register the region of interests (ROIs) of the LR and HR image pairs in an automated manner free of sub-pixel interpolation. Evaluation results demonstrate the special characteristics of the captured ground truth HR–LR face images compared to the simulated ones. The dataset is made freely available for noncommercial research purposes.

How to obtain the dataset

To receive a copy of the dataset, the researcher(s) must agree to the terms and conditions in the License Agreement, and sign the document. The permission to download the dataset will be granted after the receipt of the signed document. Please note that: (1) The agreement must be signed by the recipient and the director of your research department. (2) Students are not eligible, therefore the request must be made and signed by their supervisor.

Please send the signed document by Email attachment to:
Chengchao Qu
Email: chengchao.qu@iosb.fraunhofer.de