With the increasing maturity of traditional image information processing

from the pointof theories and utilities

it is of great importance for researchers to find new theories and new ideas based technology. First

this paper briefly introduces the research contents

main characteristics and basic theories of grey theory. Then the state-of-artofgrey theory in image engineering is summarized and analyzed in three levels: image processing

image analysis and image understanding. In addition

some research fruits of the authors are reported. Finally

some key issues and perspectives of grey theory in image engineering are pointed out. Research conclusions show that in spite of a new theory in image engineering

grey theory is feasible

efficient and almost covers all the fields of image engineering.