A Centroid based Hough Transformation for Indian license plate skew detection and correction of IR and color images

Arulmozhi, K; Perumal, S. Arumuga; Deepak, T T; Nallaperumal, Krishnan

doi:10.1109/iccic.2012.6510312

Cited by 5 publications

(2 citation statements)

References 3 publications

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“…Skew estimation technique proposed by Arulmozhi et al [14] based on centroid based hough transform is used for license plate skew correction. Arulmozhi et al [14] introduces skew detection and correction technique by Modified hough transform. The numbers of pixels are reduced to reduce the total time of operation.…”

Section: Also Used Bounding Box Of Connected Componentsmentioning

confidence: 99%

An Overview of Existing Literature on Document Skew Detection

(Corresponding Author),

BHATTACHARYA,

CHAUDHURI

2023

MJCS

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This article presents somewhat detail discussions on document image skew detection methods available in the existing literature. We first categorise the document images into several types and then we discuss different methods available to detect the skew angle of document images belonging to the individual categories. Various methods of document image skew detection include Hough Transform, Principal Components Analysis, Projection Profile based methods, Nearest Neighbor clustering, Connected Component Analysis, Cross Correlation, Radon Transform etc. Discussions on different standard databases of document image samples that have been used by the authors for experimentation purpose are included in the survey. These databases include NIST Federal Register Document Image Database, UW-I, UW-II, UW-III databases, ICDAR DISEC 2013 database, IFN/ENIT database etc. Here, we consider about eight such standard databases. Moreover, we compare different methods with respect to their accuracy and the respective range of skew angles detected by the concerned methods.

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Section: Also Used Bounding Box Of Connected Componentsmentioning

confidence: 99%

An Overview of Existing Literature on Document Skew Detection

(Corresponding Author),

BHATTACHARYA,

CHAUDHURI

2023

MJCS

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“…However, for the plate without border, only the edges of top and bottom contour of the characters can reflect the tilt angle of the plate (Al-Ghaili, Mashohor, Ramli, & Ismail, 2013). Considered that the plate frame may not exist, the most effective method is, through the top and bottom edges of the characters, to calculate the useful data that the Hough transform needs (Arulmozhi, Perumal, Deepak, & Nallaperumal, 2012). The failure of this license plate correction has a large variant of influence on the subsequent work.…”

Section: Hough Transformmentioning

confidence: 99%

Rotation correction for license plate recognition

Nguyen

Yan

2018

2018 4th International Conference on Control, Automation and Robotics (ICCAR)

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The focus of this thesis is on reliable and robust license plate recognition (LPR). The technology is currently in operation that both the quantity and quality-based approaches are needed. The entire procedure of license plate recognition consists of six steps: (1) image acquisition, (2) image pre-processing, (3) plate locating, (4) character segmentation, (5) character recognition, (6) output. However, when a road is uneven and slant, a vehicle will be shaky while running; consequently, the plate is also unstable and tilted with an angle of rotation at this moment. Meanwhile, a surveillance camera is very difficult to capture an effective image so that the plate is hard to be located and recognized. Due to this existing problem, the contributions of this thesis are: (1) plate tilt correction using Hough transform; (2) GNN-based plate number recognition. The novelties of this thesis are to improve the robustness and reliability of license plate recognition through literature review as well as evaluate those existing technologies.

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Vehicle number plate detection and recognition using bounding box method

Babu

Raghunadh

2016

2016 International Conference on Advanced Communication Control and Computing Technologies (ICACCCT)

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A Centroid based Hough Transformation for Indian license plate skew detection and correction of IR and color images

Cited by 5 publications

References 3 publications

An Overview of Existing Literature on Document Skew Detection

An Overview of Existing Literature on Document Skew Detection

Rotation correction for license plate recognition

Vehicle number plate detection and recognition using bounding box method

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