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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)

    http://c/Program%20Files/National%20Instruments/Vision%20Assistant%207.0/Vision%20Assistant.exe

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    Gray Level

    Perception (2)

    http://c/Program%20Files/National%20Instruments/Vision%20Assistant%207.0/Vision%20Assistant.exe

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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: Powerx

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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

    http://www.adobe.com/main.html

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    Color Models: HSL (HSI)

    Source: Adobe Technical Guides

    http://www.adobe.com/main.html

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    Converting RGB to HSL (HSI)

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    Example: NI Vision Assistant

    http://c/Program%20Files/National%20Instruments/Vision%20Assistant%207.0/Vision%20Assistant.exe

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    Example: LabVIEW

    http://localhost/var/www/pro-rts/intern/downloads/Bildverarbeitung/examples/exercise%202.4.vi

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    Spatial Image Filtering

    Filter

    Kernel

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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)

    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

    Bi M h l St t i

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    Binary Morphology: Structuring

    Element

    St t i El t

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    Structuring Element

    Configuration

    1 1 1 1 1 0 0 0 0 0 0 0

    1 1 1 1 1 1 0 0 0 0 0 01 1 1 1 1 1 0 0 0 0 0 0

    1 1 1 1 1 1 1 0 0 0 0 0

    1 1 1 1 1 1 1 0 0 0 0 0

    1 1 1 1 1 1 1 0 0 0 0 0

    1 1 1 1 1 1 1 0 0 0 0 0

    1 1 1 1 1 1 1 0 0 0 0 0

    1 1 1 1 1 1 0 0 0 0 0 0

    1 1 1 1 1 1 0 0 0 0 0 0

    1 1 1 1 1 1 0 0 0 0 0 0

    1 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

    C

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    Convex

    E i 4 18

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    Exercise 4.18

    S ti

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    Separation

    E i 4 19

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    Exercise 4.19

    Sk l t L

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    Skeleton L

    E i 4 20

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    Exercise 4.20

    Sk l t M

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    Skeleton M

    Ski F ti

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    Skiz Function

    O tli

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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

    G L l E i

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    Gray-Level Erosion

    E i 4 21

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    Exercise 4.21

    G L l Dil ti

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    Gray-Level Dilation

    Sq are and He agon

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    Square and Hexagon

    Gray Level Opening

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    Gray-Level Opening

    Gray Level Closing

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    Gray-Level Closing

    Gray Level Proper Open

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    Gray-Level Proper Open

    Gray Level Proper Close

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    Gray-Level Proper Close


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