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An introduction to digital image processing
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The article was published on 1986-01-01 and is currently open access. It has received 1745 citations till now. The article focuses on the topics: Digital image processing & Image processing.read more
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Journal ArticleDOI
Automatic identification of Spread F using decision trees
TL;DR: A machine learning method related to decision tree was adopted to automatically identify Spread F from ionograms and results indicate that the decision tree performed well in automatic identification of Spread F on ionograms.
Journal ArticleDOI
The effectiveness of different thresholding techniques in segmenting micro CT images of porous carbonates to estimate porosity
TL;DR: A comparison between directly measured and image-derived porosities clearly exhibited that the application of different segmentation methods produced vastly different results, demonstrating the importance of the segmentation step for quantitative pore space analysis.
Proceedings ArticleDOI
Automatic licence plate recognition system
Farzin Aghdasi,H. Ndungo +1 more
TL;DR: A machine vision system designed to recognize Botswana license plates is presented and the techniques used are: colour filtering, Niblack binarisation, blob selection, segmentation, template matching, neural networks, and Euler number.
Journal ArticleDOI
Direct decorrelation stretch technique for RGB colour composition
Liu Jian Guo,J. McM. Moore +1 more
TL;DR: Direct Decorrelation Stretch (DDS) as mentioned in this paper is a simple method to achieve a saturation (decorrelation) stretch without coordinate transformation, which can be expressed in terms of an achromatic component and a chromatic (pure colour) component.
Journal ArticleDOI
Parameter-free based two-stage method for binarizing degraded document images
TL;DR: A two-stage parameter-free window-based method to binarize the degraded document images that is competitive when compared to the existing adaptive binarization methods and achieves better performance in precision, accuracy, and F-measure.
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Survey over image thresholding techniques and quantitative performance evaluation
Mehmet Sezgin,Bulent Sankur +1 more