Image Recognition of Occluded Objects Based on Improved Curve Moment Invariants

Kang Lichun; Lim Kah Bin; Yao Jin
June 2009
Journal of Digital Information Management;Jun2009, Vol. 7 Issue 3, p152
Academic Journal
This paper presents some fundamental knowledge of image recognition of partially occluded objects, and brings forward an improved set of curve moment in variants to recognize occluded objects in images. Occluded objects in an image are not rich in information, while the improved curve moment in variants can represent those objects in a unique way. Therefore, the occluded objects can be efficiently recognized through their shape representation by the set of curve moment in variants as their features. A number of model objects are pre defined in the experiments to build the prior knowledge database for the sake of matching and recognizing unknown objects in future input images. Image pre-processing is employed for both model objects and unknown input objects to obtain their boundary and partition it into subparts. Corner points along the boundary are detected after image pre-processing so that the objects can be described by the curve moment in variants of each subpart. Finally, the matching of curve moment in variants between model object and unknown object is carried on to recognize the unknown object in the input scene image. The results of experiments show that this method is robust and efficient to recognize partially occluded objects in 2D images; furthermore, the invariance to the affine transformation of objects in images are also proved in the paper.


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