Transcript Image Processing and Analysis

Image Processing and Analysis
Image Processing
Agenda
• Gray-Level Operations
– Look-up Tables
– Brightness and Contrast
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Color Space Operations
Frequency Filtering
Basic Morphology
Particle Filtering and Parameters
Gray-Level Morphology
Modifying Gray Values
Gray Level
Perception (1)
Gray Level
Perception (2)
Creating LuT (Look-up Tables)
LuT: Linear
LuT: Logarithmic
LuT: Exponential
LuT: Square
LuT: Square Root
LuT: Power x
LuT: Power 1/x
LuT: Equalize
LuT: Inverse
Exercise 4.4
Brightness and Contrast
Exercise 4.5
Color Models: RGB
Source: Adobe Technical Guides
Color Models: HSL (HSI)
Source: Adobe Technical Guides
Converting RGB to HSL (HSI)
Example: NI Vision Assistant
Example: LabVIEW
Spatial Image Filtering
Filter
Kernel
Filter Kernel Impact
(Smoothing)
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255
New value: 99
Filter Kernel Impact
Exercise 4.7
• Kernel Families:
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Smoothing
Gaussian
Gradient
Laplacian
Smoothing Filter
Gaussian Filter
Gradient Filter (0)
Prewitt
Kernel
Gradient Filter (1)
Gradient Filter (4)
Prewitt
Kernel
Gradient Filter: Sobel Kernel
Laplace Filter (0)
Laplace Filter (1)
Laplace Filter (6)
Laplace Filter (7)
Frequency Filtering
FFT Spectrum (Image)
Exercise 4.8
Standard and Optical Display
FFT Truncate (Low Pass)
Exercise 4.9
FFT Truncate (High Pass)
FFT Attenuate (Low Pass)
FFT Attenuate (High Pass)
Morphology Functions
Thresholding
Erosion
Binary Morphology: Structuring
Element
Structuring Element
Configuration
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Exercise 4.13
Dilation
Opening
Closing
Proper Opening
Proper Closing
Hit-Miss Function
Hit-Miss Function (2)
Inner Gradient (Internal Edge)
Outer Gradient (External Edge)
Total Gradient
Thinning
Thickening
Auto-Median
Outline
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Gray Values and Look-up Tables (LuTs)
Color Spaces and Models
Spatial Filtering
Frequency Filtering
Basic Morphology
Particle Filtering and Parameters
Gray Level Morphology
Remove Particle: Low Pass
Remove Particle: High Pass
Exercise 4.14
Reject Border
Exercise 4.15
Particle Filtering
Exercise 4.16
Basic Particle Analysis
Complex Particle Analysis
Particle Parameter
Fill Holes
Exercise 4.17
Convex
Exercise 4.18
Separation
Exercise 4.19
Skeleton L
Exercise 4.20
Skeleton M
Skiz Function
Outline
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Gray Values and Look-up Tables (LuTs)
Color Spaces and Models
Spatial Filtering
Frequency Filtering
Basic Morphology
Particle Filtering and Parameters
Gray Level Morphology
Gray-Level Erosion
Exercise 4.21
Gray-Level Dilation
Square and Hexagon
Gray-Level Opening
Gray-Level Closing
Gray-Level Proper Open
Gray-Level Proper Close