Optical image compression and encryption methods

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• Advances in Optics and Photonics, Vol. 1 Issue 3, pp.589-636 (2009)
• Alfalou, Ayman; Brosseau, C
• Over the years extensive studies have been carried out to apply coherent optics methods in real-time communications and image transmission. This is especially true when a large...

Selection of regularization parameter in total variation image restoration

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• JOSA A, Vol. 26 Issue 11, pp.2311-2320 (2009)
• Liao, Haiyong; Li, Fang; Ng, Michael K
• We consider and study total variation (TV) image restoration. In the literature there are several regularization parameter selection methods for Tikhonov regularization problems...

Fast color quantization using weighted sort-means clustering

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• JOSA A, Vol. 26 Issue 11, pp.2434-2443 (2009)
• Celebi, M Emre
• Color quantization is an important operation with numerous applications in graphics and image processing. Most quantization methods are essentially based on data clustering...

Inline hologram reconstruction with sparsity constraints

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• Optics Letters, Vol. 34 Issue 22, pp.3475-3477 (2009)
• Denis, Loïc; Lorenz, Dirk; Thiébaut, Eric; Fournier, Corinne; Trede, Dennis
• Inline digital holograms are classically reconstructed using linear operators to model diffraction. It has long been recognized that such reconstruction operators do not invert the...

Hybrid filtering and enhancement of high-resolution adaptive-optics retinal images

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• Optics Letters, Vol. 34 Issue 22, pp.3484-3486 (2009)
• Bao, Hua; Rao, Changhui; Zhang, Yudong; Dai, Yun; Rao, Xuejun; Fan, Yubo
• Adaptive optics flood-illuminated imaging technology has been successfully used to correct the wavefront aberration of human eyes to obtain high-resolution retinal images. However,...

Analytical solution to the phase-diversity problem for real-time wavefront sensing

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• Optics Letters, Vol. 34 Issue 22, pp.3487-3489 (2009)
• Mocœur, Isabelle; Mugnier, Laurent M; Cassaing, Frédéric
• High-resolution optical systems require a very accurate control of the optical paths. For the measurement of aberrations on extended objects, several iterative phase-diversity...

Measurement of buried undercut structures in microfluidic devices by laser fluorescent confocal microscopy

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• Applied Optics, Vol. 48 Issue 33, pp.6432-6441 (2009)
• Li, Shiguang; Liu, Jing; Nguyen, Nam-Trung; Fang, Zhong Ping; Yoon, Soon Fatt
• Measuring buried, undercut microstructures is a challenging task in metrology. These structures are usually characterized by measuring their cross sections after physically cutting...

Robust stereo image matching using a two-dimensional monogenic wavelet transform

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• Optics Letters, Vol. 34 Issue 22, pp.3514-3516 (2009)
• Li, Jinjun; Zhao, Hong; Zhou, Xiang; Shi, Chengying
• A robust approach based on the 2D monogenic wavelet transform (MWT), which pairs the polyharmonic B-spline wavelet basis with its complex Riesz counterparts to specify a...

Geometrically robust image watermarking by sector-shaped partitioning of geometric-invariant regions

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• Optics Express, Vol. 17 Issue 24, pp.21819-21819 (2009)
• Tian, Huawei; Zhao, Yao; Ni, Rongrong; Cao, Gang
• In a feature-based geometrically robust watermarking system, it is a challenging task to detect geometric-invariant regions (GIRs) which can survive a broad range of image processing...