Title :
The surface-shape operator and its application to image retrieval
Author :
Sukanya, Phongsuphap ; Takamatsu, R. ; Sato, Makoto
Author_Institution :
Precision & Intelligence Lab., Tokyo Inst. of Technol., Yokohama, Japan
Abstract :
This paper proposes an operator called the surface-shape sperator for describing image structures. By considering an image function as a surface, the surface-shape operator is established for describing the shape of each pixel compared with its neighbourhood, In this paper,the surface-shape operator is used as a pre-processing for describing the multiscale topographic structures of images in scale-space representation. Then, image features are extracted from the transformed images instead of the original ones. The surface-shape operator has invariant properties under linear and monotonic gray tone transformations, and is insensitive to additive noises modelled by linear functions, so it has robustness with brightness variations and shading effects. Finally, we show the usefulness of the proposed approach with the image retrieval application. By comparing the Wold features, the multiresolution simultaneous autoregressive features and the proposed features, the proposed features can provide the best pattern retrieval accuracy
Keywords :
autoregressive processes; brightness; feature extraction; image resolution; image retrieval; Wold features; additive noises; brightness variations; gray tone transformations; image features; image function; image retrieval; image structures; invariant properties; linear functions; multiresolution simultaneous autoregressive features; multiscale topographic structures; pattern retrieval accuracy; pre-processing; robustness; scale-space representation; shading effects; surface-shape operator; transformed images; Additive noise; Brightness; Eigenvalues and eigenfunctions; Image analysis; Image retrieval; Intelligent structures; Laboratories; Noise robustness; Shape; Surface topography;
Conference_Titel :
Circuits and Systems, 1998. IEEE APCCAS 1998. The 1998 IEEE Asia-Pacific Conference on
Conference_Location :
Chiangmai
Print_ISBN :
0-7803-5146-0
DOI :
10.1109/APCCAS.1998.743885