Approximating shape from focus by averaging filter

Seong-O Shim; Tae-Sun Choi

doi:10.1117/12.827021

2 September 2009 Approximating shape from focus by averaging filter

Seong-O Shim, Tae-Sun Choi

Proceedings Volume 7443, Applications of Digital Image Processing XXXII; 744320 (2009) https://doi.org/10.1117/12.827021
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

The technique to estimate the depth and 3D shape of an object from the images of the same sample obtained at different focus settings is called shape from focus (SFF). Conventional SFF methods sum up the focus values within a small window of each pixel in the image. It produces a surface distortion effect, and an inaccurate depth map is obtained. In this paper, a fast and accurate SFF method based on averaging filter is proposed. We suggest that instead of averaging focus values, averaging depth values produces more accurate depth map. The experimental results demonstrate the effectiveness and the efficiency of the proposed method in comparison to the conventional methods.

Citation Download Citation

Seong-O Shim and Tae-Sun Choi "Approximating shape from focus by averaging filter", Proc. SPIE 7443, Applications of Digital Image Processing XXXII, 744320 (2 September 2009); https://doi.org/10.1117/12.827021

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