Gholamreza Anbarjafari, PhD Video Lecturers on Digital Image Processing Digital Image Processing Spatial Domain Filtering: Part I.

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Presentation transcript:

Gholamreza Anbarjafari, PhD Video Lecturers on Digital Image Processing Digital Image Processing Spatial Domain Filtering: Part I

Gholamreza Anbarjafari, PhD Video Lecturers on Digital Image Processing Spatial Filtering w(-1,-1)w(-1,0)w(-1,1) w(0,-1)w(0,0)w(0,1) w(1,-1)w(1,0)w(1,1) Mask coefficients showing coordinate arrangement

Gholamreza Anbarjafari, PhD Video Lecturers on Digital Image Processing Convolution

Gholamreza Anbarjafari, PhD Video Lecturers on Digital Image Processing Convolution Rotate 180 o Convolution kernel, ω Input Image, f

Gholamreza Anbarjafari, PhD Video Lecturers on Digital Image Processing Convolution Input Image, f Output Image, g

Gholamreza Anbarjafari, PhD Video Lecturers on Digital Image Processing Input Image, f Output Image, g Convolution

Gholamreza Anbarjafari, PhD Video Lecturers on Digital Image Processing Input Image, f Output Image, g Convolution

Gholamreza Anbarjafari, PhD Video Lecturers on Digital Image Processing Input Image, f Output Image, g Convolution

Gholamreza Anbarjafari, PhD Video Lecturers on Digital Image Processing Input Image, f Output Image, g Convolution

Gholamreza Anbarjafari, PhD Video Lecturers on Digital Image Processing Input Image, f Output Image, g Convolution

Gholamreza Anbarjafari, PhD Video Lecturers on Digital Image Processing Final output Image, g Convolution

Gholamreza Anbarjafari, PhD Video Lecturers on Digital Image Processing Correlation

Gholamreza Anbarjafari, PhD Video Lecturers on Digital Image Processing Don’t rotate use it directly correlation kernel, ω Input Image f Correlation

Gholamreza Anbarjafari, PhD Video Lecturers on Digital Image Processing Input Image, f output Image, g Correlation

Gholamreza Anbarjafari, PhD Video Lecturers on Digital Image Processing Input Image, f output Image, g Correlation

Gholamreza Anbarjafari, PhD Video Lecturers on Digital Image Processing Input Image, f output Image, g Correlation

Gholamreza Anbarjafari, PhD Video Lecturers on Digital Image Processing Input Image, f output Image, g Correlation

Gholamreza Anbarjafari, PhD Video Lecturers on Digital Image Processing Input Image, f output Image, g Correlation

Gholamreza Anbarjafari, PhD Video Lecturers on Digital Image Processing Input Image, f output Image, g Correlation

Gholamreza Anbarjafari, PhD Video Lecturers on Digital Image Processing Final output Image, g Correlation

Gholamreza Anbarjafari, PhD Video Lecturers on Digital Image Processing Linear Spatial Filtering

Gholamreza Anbarjafari, PhD Video Lecturers on Digital Image Processing Smoothing Spatial Filters Types of Smoothing Filters : linear and nonlinear Smoothing Linear Filters : known as averaging filter or lowpass filters.

Gholamreza Anbarjafari, PhD Video Lecturers on Digital Image Processing Smoothing Linear Filters Box filter Weighted average filter

Gholamreza Anbarjafari, PhD Video Lecturers on Digital Image Processing Smoothing Linear Filters © 2002 R. C. Gonzalez & R. E. Woods Original3x3 5x5 9x9 15x1535x35

Gholamreza Anbarjafari, PhD Video Lecturers on Digital Image Processing Smoothing Linear Filters © 2002 R. C. Gonzalez & R. E. Woods original blurred thresholded

Gholamreza Anbarjafari, PhD Video Lecturers on Digital Image Processing Summary We have looked at: –What are spatial domain operations. –What are convolution and correlation. –What is smoothing linear filter Next time we will continue our talk about image enhancement in spatial domain by focusing on statistical terminology