Image Processing Components and Techniques

Image Processing Ref: Digital image processing ,Gonzalez & Woods

Components of an Image Processing System: Ref: Digital image processing ,Gonzalez & Woods

Image sensing 1. a physical device that is sensitive to the energy radiated by the object. 2. a digitizer ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Digitizer: Ref: Digital image processing ,Gonzalez & Woods Commonly used digitizers 1. Microdensitometer and 2. flying spot scanner.

Digital storage : Ref: Digital image processing ,Gonzalez & Woods categorized as (1) short-term storage for use during processing, eg: frame buffers. (2) on-line storage for relatively fast re-call, and (3) archival storage, characterized by infrequent access.

Image displays: Ref: Digital image processing ,Gonzalez & Woods Principal display devices are 1. printers, 2.TV monitor, 3. CRTs Hardcopy: laser printers, film cameras, heat-sensitive devices, inkjet units, and digital units, such as optical and CD-ROM disks, paper etc.

Ref: Digital image processing ,Gonzalez & Woods

Ref: Digital image processing ,Gonzalez & Woods Spatial and Gray-Level Resolution: Spatial Resolution: is the smallest discernible detail in an image. Gray—level resolution: refers to the smallest discernible change in gray level . -subjective process.

Ref: Digital image processing ,Gonzalez & Woods Aliasing and Moiré Patterns:

Ref: Digital image processing ,Gonzalez & Woods Zooming and Shrinking Digital Images: ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Ref: Digital image processing ,Gonzalez & Woods 2D bilenear interpolation Original Before After No Interpolation

Gamma Correction Gamma Measuring Applet: http:// www.cs.berkeley.edu/~efros/java/gamma/gamma.html

Ref: Digital image processing ,Gonzalez & Woods Periodic noise

Mean and variance of the gray levels in image strips

Ref: Digital image processing ,Gonzalez & Woods Wrong sign for Q

Ref: Digital image processing ,Gonzalez & Woods Max and Min filter

Ref: Digital image processing ,Gonzalez & Woods Alpha trimmed mean filter with d=5

Ref: Digital image processing ,Gonzalez & Woods Adaptive noise reduction filtering

What is an image? ,[object Object],[object Object],[object Object],[object Object],[object Object]

What is a digital image? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Image processing ,[object Object],[object Object],[object Object],[object Object]

Point Processing ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Neighborhood Processing (filtering) ,[object Object],[object Object],[object Object]

Programming Assignment #1 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Image Processing Components and Techniques

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