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Huiyu Zhou, Jiahua Wu & Jianguo Zhang Digital Image Processing Part II 2 Digital Image Processing – Part II © 2010 Huiyu Zhou, Jiahua Wu, Jianguo Zhang & Ventus Publishing ApS ISBN 978-87-7681-542-4 3 Digital Image Processing – Part II Contents Contents Prefaces 7 1. Colour Image Processing 8 1.1 Colour Fundamentals 8 1.2 Colour Space 10 1.3 Colour Image Processing 12 1.4 Smoothing and sharpening 15 1.5 Image segmentation 18 1.6 Colour Image Compression 24 Summary 26 References 28 Problems 28 2. Morphological Image Processing 30 2.1 Mathematical morphology 30 2.1.1 Introduction 30 2.1.1 Binary images 30 2.1.2 Operators in set theory 30 2.1.3 Boolean logical operators 32 2.1.4 Structure element 32 2.2 Dilation and Erosion 34 2.2.1 Dilation 34 2.2.2 Erosion 35 4 Digital Image Processing – Part II Contents 2.2.3 Properties of dilation and erosion 36 2.2.4 Morphological gradient 38 2.3 Opening and closing 40 2.3.1 Opening 40 2.3.2 Closing 41 2.3.3 Properties of opening and closing 44 2.3.4 Top-hat transformation 46 2.4 Hit-or-miss 48 2.5 Thinning and thicken 50 2.6 Skeleton 53 2.7 Pruning 55 2.8 Morphological reconstruction 57 2.8.1 Definition of morphological reconstruction 57 2.8.2 The choice of maker and mask images 59 Summary 60 References and further reading 60 Problems 61 3. Image Segmentation 62 3.1 Introduction 62 3.2 Image pre-processing – correcting image defects 62 3.2.1 Image smooth by median filter 63 3.2.2 Background correction by top-hat filter 63 3.2.3 Illumination correction by low-pass filter 65 3.2.4 Protocol of pre-process noisy image 65 5 ... - tailieumienphi.vn
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