Three-dimensional Polychromatic Objects Classification Based on Amplitude Modulation and Amplitude-shift Keying
✍ Scribed by Eric Paquet
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 348 KB
- Volume
- 3
- Category
- Article
- ISSN
- 1077-2014
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✦ Synopsis
Three-dimensional Polychromatic Objects Classification Based on Amplitude Modulation and Amplitude-shift Keying
lgorithms allowing the classification of three-dimensional (3D) polychromatic images based on amplitude modulation and amplitude-shift keying are introduced. For this purpose, the 3D Ai nformation is likened to a 'carrier wave', while the color information is likened to a 'modulating signal'. The first algorithm is based on the amplitude modulation of the range by the hue. On the amplitude-shift keying platform, two algorithms are designed based on a three-channels red, green and blue modulation and a six-channels hue modulation. In the three-channels approach, the modulation of the three-dimensional image is performed on the basis of the relative ordination of the red, green and blue components, while in the six-channels approach, modulation is performed by partitioning the hue interval into six subintervals. The cross-angle distributions of the modulated range images are calculated in order to obtain invariant representations. Shift keying modulation is also applied to the cross-angle distributions in order to obtain a chromatic sampling of crossangles. From these cross-angle representations a set of histograms are built. The classification is performed by comparing the unknown histograms to a reference set. The classified object corresponds to the smallest error.