CS 450: Introduction to Digital Signal and Image Processing - Introduction and Applications

CS 450: Introduction to Digital Signal and Image Processing - Introduction and Applications includes what are Signals? Why Signals? Alications; Kinds of Operations; Relationship to Other Fields (IP, Graphics, and Vision); BYU Research.

CS 450: Introduction to Digital Signal and Image Processing

Introduction and Applications

What are Signals?

G Signal: a function carrying information

G Examples:

» Audio

» Radio/Television

» Images

Why Signals?

G Communications

» Modems/Networks/Wireless

» Audio

G Images

» Restoration/Cleanup

» Enhancement

» Storage/Retrieval/Searching

» Manipulation

Why Digital?

G Perfect storage, transmission, reproduction

G Easier to manipulate

» Analog signals manipulated by circuits

» Digital signals manipulated by computer

Why Now?

G Memory is cheap

G Disk storage is plentiful

G Bandwidth increasing

G Multimedia (just look at the web!)

G Intelligent image tools

G Medical imaging

G Compression

G Document Processing

G Image libraries (storage and retrieval)

Kinds of Operations (What We’ll Cover)

G Level operations

G Geometric Operations

G Algebraic Operations

G Filtering

G Sampling

G Restoration/Reconstruction

G Color processing

G Compression

Relationship to Other Fields:

IP, Graphics, and Vision

Image Processing Images to Images

Computer Graphics Descriptions to Images Computer Vision Images to Descriptions

All three are interrelated!

Examples: Image Processing,

Graphics, and Vision

G Volume rendering for medical applications:

» Clean up the image

(image processing)

» Separate the regions of interest

(computer vision - segmentation)

» Render

(graphics)

Examples: Vision, IP, and

Graphics

G Image-Based Rendering

» Use images and analysis of content (vision)

» to render new images (graphics)

BYU Research

G Intelligent segmentation tools

(scissors, paint)

G Morphing

G Terrain modeling and rendering

G Creation of image-based virtual

environments

G Registration/viewing of multiresolution imagery

BYU Research (cont’d)

G Resolution enhancement

G Color quantization

G Interactive level-set tools

G Digital libraries

G Genealogical databases

(OCR, compression, form recognition, indexing, online browsing, etc.)