03-12-2012, 05:42 PM
Computer imaging system and image analysis
Computer imaging system.pptx (Size: 176.14 KB / Downloads: 13)
Introduction
Computer Imaging :
Acquisition and processing of visual information by computer.
Why is it important?
Human primary sense is visual sense.
Information can be conveyed well through images (one picture worth a thousand words).
Computer is required because the amount of data to be processed is huge.
Computer imaging can be divided into two main categories:
Computer Vision: Applications of the output are for use by a computer. Image Processing: Applications of the output are for use by human.
These two categories are not totally separate and distinct.
They overlap each other in certain areas.
Computer Vision
Does not involve human in the visual loop.
One of the major topic within this field is image analysis.
Image analysis involves the examination of image data to facilitate in solving a vision problem.
Image analysis process involves two other topics:
Feature extraction: acquiring higher level image info (shape and color)
Pattern classification: using higher level image information to identify objects within image.
Application
Industrial inspection/quality control
Surveillance and security
Face recognition
Gesture recognition
Space applications
Medical image analysis
Autonomous vehicles
Virtual reality
Quality control (inspect circuit board).
Satellite image processing.
Biometrics verification (fingerprint, retina, DNA, signature, etc).
Computer Imaging Systems
Computer imaging systems comprises of both hardware and software.
The hardware components can be divided into three subsystems:
The computer
Image acquisition: camera, scanner, video recorder.
Image display: monitor, printer, film, video player.
The software is used for the following tasks:
Manipulate the image and perform any desired processing on the image data.
Control the image acquisition and storage process.
The computer system may be a general-purpose computer with a frame grabber or image digitizer board in it.