الفهرس Only 14 pages are availabe for public view
 |  | from | 258 |  |  |
| | | from | 258 | | |
Abstract
THIS THESIS PRESENTS ALOGRITHMS FOR RESTORING SOME OF THE MAJOR CORRUPTION OBSERVED IN ARCHIVED FILMS OR VIDEO MATERIALS.THE TWO PRINCIPLES PROBLEMS OF IMPULSIVE DISTORTION AND NOISE DEGRADATION ARE CONSIDERED IN THE CASE OF NOISE REDUCTION AND BLOTH REMOVAL, THE THESIS CONSIDERS IMAGE SEQUENCES TO BE THREE-DIMENSIONAL SIGNALS INVOLVING EVOLUTION OF FEATURES IN TIME AND SPACE.THIS IS NECESSARY IF ANY PROCESS PRESENTED IS TO SHOW AN IMPROVEMENT OVER STANDARD TWO-DIMENSIONAL TECHNIQUES.IMPULSIVE NOISE REMOVAL IN IMAGE PROCESSING HAS BEEN TRADITIONALLY ACHIEVED BY THE USE OF MEDIAN FILTER. A NEW THREE-DIMENSIONAL MULTILEVEL MEDIAN STRUCTURE IS PRESENTED IN THIS THESIS WITH ADDITIONAL USE OF MOTION VECTORS (DEFERENT TYPES OF MOTION ARE CONSIDERED).THIS TECHNIQUE IS FOUND TO BE EXTREMELY EFFECTIVE IN PRACTICE. HISTOGRAM MODIFICATION IS USED TO ENHANCE THE RESTRORED FRAMES.