25-05-2012, 04:51 PM
Digital Image Processing AND Analysis
Digital Image Processing AND Analysis.ppt (Size: 704 KB / Downloads: 57)
Definitions
Image Processing
Image Analysis (Image Understanding)
Computer Vision
Low Level Processes: contrast manipulation
Mid-Level Processes: segmentation, recognition
High Level Processes: understanding groups of objects
Important Stages in Image Processing
Image Acquisition
Preprocessing
Segmentation
Representation and Description
Recognition and Interpretation
Knowledge base
Image Acquisition
Imaging sensor & capability to digitize the signal collected by the sensor
Video camera
Digital camera
Conventional camera & analog-to-digital converter
Segmentation
To partition the image into its constituent parts (objects)
Autonomous segmentation (very difficult)
Can facilitate or disturb subsequent processes
Output (representation):
Raw pixel data, depicting either boundaries or whole regions (corners vs. texture for example)
Need conversion to a form suitable for computer processing
(Description)