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1 2010

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JCURVE : Multiscale Curve Coding via Second Order Beamlets

Lisowska A., Kaczmarzyk T.

Machine Graphics and Vision

2010

Vol. 19, No. 3

265-281

The paper presents an algorithm JCURVE for compression of binary images with linear or curvilinear features, which is a kind of generalization of the JBEAM coder. The proposed algorithm is based on second order beamlet representation, where second order beamlets are defined as hierarchically organized segments of conic curves. The algorithm can compress images in both a lossy and losless way, and it is also progressive. The experiments performed on benchmark images have shown that the proposed algorithm significantly outperforms the known JBIG2 standard and the base JBEAM algorithm both in losless and lossy compression. It is characterized, additionally, by the same time complexity as JBEAM, namely O(N² log₂ N) for image of size N × N pixels.