On the evaluation of document analysis components by recall, precision, and accuracy

Junker, Markus; Hoch, Rainer; Dengel, Andreas

doi:10.1109/icdar.1999.791887

Cited by 141 publications

(50 citation statements)

References 5 publications

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“…In Figure 12, we show the detection accuracy of both stateless and stateful IODetectors. We report the average detection results, including detection precision and recall [Junker et al 1999], in different scenarios. The overall detection accuracy of the stateless IODetector is about 85%.…”

Section: System Performancementioning

confidence: 99%

IODetector

Zhou

Zheng

et al. 2014

ACM Trans. Sen. Netw.

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The location and context switching, especially the indoor/outdoor switching, provides essential and primitive information for upper-layer mobile applications. In this article, we present IODetector: a lightweight sensing service that runs on the mobile phone and detects the indoor/outdoor environment in a fast, accurate, and efficient manner. Constrained by the energy budget, IODetector primarily leverages lightweight sensing resources, such as light sensors, magnetism sensors, and cell tower signals. For universal applicability, IODetector assumes no prior knowledge (e.g., fingerprints) of the environment and uses only on-board sensors common to mainstream mobile phones. Being a generic and lightweight service component, IODetector greatly benefits many location-based and context-aware applications. We prototype the IODetector on Android mobile phones and evaluate the system comprehensively with data collected from 34 traces that include 133 different places during a 6-week period, employing different phone models. We further perform a case study where we make use of IODetector to instantly infer the GPS availability and localization accuracy in different indoor/outdoor environments.

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Section: System Performancementioning

confidence: 99%

IODetector

Zhou

Zheng

et al. 2014

ACM Trans. Sen. Netw.

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“…Due to significant bleed-through removal while still respecting the original ink, our method clearly outperforms previous algorithms. While small datasets should be interpreted with care [8], our results so far are very promising.…”

Section: Resultsmentioning

confidence: 61%

Manuscript Bleed-through Removal via Hysteresis Thresholding

Estrada

Tomasi

2009

2009 10th International Conference on Document Analysis and Recognition

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Many types of degradation can render ancient manuscripts very hard to read. In bleed-through, the text from the reverse, or verso, side of a page seeps through into the front, or recto. In this paper, we propose hysteresis thresholding to greatly reduce bleed-through. Thresholding alone cannot properly separate ink and bleed-through because the ranges of intensities for the two classes overlap. Hysteresis thresholding overcomes this limitation via the two steps of thresholding and ink regrowth. In order to provide quantitative measures of the effectiveness of this approach, we constructed a novel dataset which features bleed-through and has available ground truth. We evaluated our method and a number of previously proposed approaches on ink pixel precision and recall. Hysteresis thresholding significantly improves over existing methods.

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“…Precision and recall defined in [6] are used as the comparison metrics. We carried out our tests on 30 documents images.…”

Section: Ocr Results Comparisonmentioning

confidence: 99%

Estimation of 3D shape of warped document surface for image restoration

Zhang¹,

Lim²,

Fan³

2004

Proceedings of the 17th International Conference on Pattern Recognition, 2004. ICPR 2004.

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While scanning pages from a thick, bound book, there are two sources of distortion in the document images: 1) shade along the book 'spine', and 2) warping of the book surface in the shade area. In this paper, we propose a fast method to estimate the 3D shape of a book surface. Based on this shape, we remove the shade and correct the warping to restore the document images. The experiments show that the photometric and geometric distortions are mostly removed. The OCR tests on the original and restored document images are also presented.

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On the evaluation of document analysis components by recall, precision, and accuracy

Cited by 141 publications

References 5 publications

IODetector

IODetector

Manuscript Bleed-through Removal via Hysteresis Thresholding

Estimation of 3D shape of warped document surface for image restoration

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