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Image Processing and Analysis Image Processing
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Agenda Gray-Level Operations –Look-up Tables –Brightness and Contrast Color Space Operations Frequency Filtering Basic Morphology Particle Filtering and Parameters Gray-Level Morphology
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Modifying Gray Values
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Gray Level Perception (1)
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Gray Level Perception (2)
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Creating LuT (Look-up Tables)
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LuT: Linear
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LuT: Logarithmic
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LuT: Exponential
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LuT: Square
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LuT: Square Root
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LuT: Power x
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LuT: Power 1/x
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LuT: Equalize
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LuT: Inverse
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Exercise 4.4
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Brightness and Contrast
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Exercise 4.5
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Color Models: RGB Source: Adobe Technical Guides
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Color Models: HSL (HSI) Source: Adobe Technical Guides
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Converting RGB to HSL (HSI)
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Example: NI Vision Assistant
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Example: LabVIEW
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Spatial Image Filtering Filter Kernel
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Filter Kernel Impact (Smoothing) 97108425856 6773568150 58677565 5067501673 34 40252255 New value: 99
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Filter Kernel Impact
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Exercise 4.7 Kernel Families: –Smoothing –Gaussian –Gradient –Laplacian
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Smoothing Filter
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Gaussian Filter
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Gradient Filter (0) Prewitt Kernel
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Gradient Filter (1)
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Gradient Filter (4) Prewitt Kernel
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Gradient Filter: Sobel Kernel
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Laplace Filter (0)
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Laplace Filter (1)
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Laplace Filter (6)
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Laplace Filter (7)
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Frequency Filtering
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FFT Spectrum (Image)
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Exercise 4.8
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Standard and Optical Display
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FFT Truncate (Low Pass)
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Exercise 4.9
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FFT Truncate (High Pass)
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FFT Attenuate (Low Pass)
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FFT Attenuate (High Pass)
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Morphology Functions
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Thresholding
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Erosion
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Binary Morphology: Structuring Element
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Structuring Element Configuration 111110000000 111111000000 111111000000 111111100000 111111100000 111111100000 111111100000 111111100000 111111000000 111111000000 111111000000 111111000000
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Exercise 4.13
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Dilation
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Opening
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Closing
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Proper Opening
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Proper Closing
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Hit-Miss Function
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Hit-Miss Function (2)
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Inner Gradient (Internal Edge)
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Outer Gradient (External Edge)
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Total Gradient
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Thinning
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Thickening
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Auto-Median
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Outline Gray Values and Look-up Tables (LuTs) Color Spaces and Models Spatial Filtering Frequency Filtering Basic Morphology Particle Filtering and Parameters Gray Level Morphology
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Remove Particle: Low Pass
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Remove Particle: High Pass
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Exercise 4.14
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Reject Border
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Exercise 4.15
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Particle Filtering
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Exercise 4.16
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Basic Particle Analysis
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Complex Particle Analysis
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Particle Parameter
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Fill Holes
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Exercise 4.17
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Convex
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Exercise 4.18
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Separation
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Exercise 4.19
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Skeleton L
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Exercise 4.20
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Skeleton M
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Skiz Function
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Outline Gray Values and Look-up Tables (LuTs) Color Spaces and Models Spatial Filtering Frequency Filtering Basic Morphology Particle Filtering and Parameters Gray Level Morphology
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Gray-Level Erosion
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Exercise 4.21
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Gray-Level Dilation
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Square and Hexagon
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Gray-Level Opening
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Gray-Level Closing
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Gray-Level Proper Open
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Gray-Level Proper Close
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