image processing and analysis image processing. agenda gray-level operations –look-up tables...
TRANSCRIPT
![Page 1: Image Processing and Analysis Image Processing. Agenda Gray-Level Operations –Look-up Tables –Brightness and Contrast Color Space Operations Frequency](https://reader035.vdocuments.mx/reader035/viewer/2022062407/56649e2a5503460f94b17b60/html5/thumbnails/1.jpg)
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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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
FilterKernel
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Filter Kernel Impact (Smoothing)
97 108 42 58 56
67 73 56 81 50
58 67 75 65 65
50 67 50 16 73
34 34 40 252 255
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)
PrewittKernel
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Gradient Filter (1)
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Gradient Filter (4)
PrewittKernel
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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
1 1 1 1 1 0 0 0 0 0 0 01 1 1 1 1 1 0 0 0 0 0 01 1 1 1 1 1 0 0 0 0 0 01 1 1 1 1 1 1 0 0 0 0 01 1 1 1 1 1 1 0 0 0 0 01 1 1 1 1 1 1 0 0 0 0 01 1 1 1 1 1 1 0 0 0 0 01 1 1 1 1 1 1 0 0 0 0 01 1 1 1 1 1 0 0 0 0 0 01 1 1 1 1 1 0 0 0 0 0 01 1 1 1 1 1 0 0 0 0 0 01 1 1 1 1 1 0 0 0 0 0 0
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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