An implementation of spatial algorithm to estimate the focus map from a single image

In this paper, the implementation to estimate the focus map spatially based on the intentional reblur of one image, which is the only input data, is presented. This enables flexible computation in the spatial domain, rather than the frequency domain. The gradient magnitude term widely used in image...

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Bibliographic Details
Published in2016 IEEE/ACIS 15th International Conference on Computer and Information Science (ICIS) pp. 1 - 5
Main Authors Yen-Bor Lin, Chung-Ping Young
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.06.2016
Subjects
Algorithm design and analysis
Cameras
focus map
Histograms
Image edge detection
image processing
Image segmentation
Three-dimensional displays
Two dimensional displays
visualization
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Summary:In this paper, the implementation to estimate the focus map spatially based on the intentional reblur of one image, which is the only input data, is presented. This enables flexible computation in the spatial domain, rather than the frequency domain. The gradient magnitude term widely used in image processing was used to derive a ratio map. The pixels closer to the focal point of the camera were on the thinner edge in the proposed ratio map. Oppositely, The edge was wider the when the pixels were far from the focal point. The core of proposed algorithm is introduced and the experimental results demonstrate the enhanced effectiveness, quality, and precision of the proposed algorithm.
DOI:10.1109/ICIS.2016.7550785