Imaging Components, Systems, and Processing

Optical flow estimation on image sequences with differently exposed frames

[+] Author Affiliations
Tomas Bengtsson, Tomas McKelvey

Chalmers University of Technology, Department of Signals and Systems, Göteborg 412 96, Sweden

Konstantin Lindström

Volvo Car Corporation, Göteborg 405 31, Sweden

Opt. Eng. 54(9), 093103 (Sep 10, 2015). doi:10.1117/1.OE.54.9.093103
History: Received March 17, 2015; Accepted July 28, 2015
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Abstract.  Optical flow (OF) methods are used to estimate dense motion information between consecutive frames in image sequences. In addition to the specific OF estimation method itself, the quality of the input image sequence is of crucial importance to the quality of the resulting flow estimates. For instance, lack of texture in image frames caused by saturation of the camera sensor during exposure can significantly deteriorate the performance. An approach to avoid this negative effect is to use different camera settings when capturing the individual frames. We provide a framework for OF estimation on such sequences that contain differently exposed frames. Information from multiple frames are combined into a total cost functional such that the lack of an active data term for saturated image areas is avoided. Experimental results demonstrate that using alternate camera settings to capture the full dynamic range of an underlying scene can clearly improve the quality of flow estimates. When saturation of image data is significant, the proposed methods show superior performance in terms of lower endpoint errors of the flow vectors compared to a set of baseline methods. Furthermore, we provide some qualitative examples of how and when our method should be used.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Tomas Bengtsson ; Tomas McKelvey and Konstantin Lindström
"Optical flow estimation on image sequences with differently exposed frames", Opt. Eng. 54(9), 093103 (Sep 10, 2015). ; http://dx.doi.org/10.1117/1.OE.54.9.093103


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