Session Index

We proposed an off-axis optical system to reconstruct images. The system adopts modified Gerchberg-Saxton algorithm (MGSA) to produce the computer generated pahse-only function, then the information will be transform to image by LCoS. Image quality was evaluated using root mean square error, structural similarity, and signal to noise ratio.

 

Spatial light modulators (SLMs) is devised as a reconfigurable optical coding access device with computer-generated hologram (CGH) coding patterns scrambled for secure optical data communications. By using SLMs we can modulate users’ data signal with different CGH pattern array to prevent from deciphering of eavesdropper.

 

Digital image correlation (DIC) is a non-contact optical-numerical technique to measure shape, motion, and deformation. It is based on the displacement of the characteristic spots on the surface, so this paper will explore the relationship between the parameters such as spots, subsets, and seed points and propose a better solution.

 

Use hyperspectral imagery plentiful information for ATR, extending this concept to military design has formed a research trend. This paper explores the establishment algorithm of hyperspectral image database, and develops a library of hyperspectral algorithms for abnormal target detection, establishes a graphical interface, and simulation calculation platform.

 

Use hyperspectral imagery plentiful information for ATR, extending this concept to military design has formed a research trend. This paper explores the establishment algorithm of hyperspectral image database, and develops a library of hyperspectral algorithms for abnormal target detection, establishes a graphical interface, and simulation calculation platform.

 

In this study, we developed a method to enhance the quality of images from a contaminated imaging system by adding a priori information as the constraints for the iterative process. By means of the Papoulis-Gerchberg (P-G) algorithm, we can achieve an effective image enhancement.

 

Multiplane microscopy with volume holographic gratings (VHGs) has been utilized, to image three-dimensional structures from different depths at the same time, for a variety of applications. However, high diffraction efficiency is always required. Here, we present nano-particle doped VHGs using a feedback piezo-electric transducer (PZT) system to enhance diffraction efficiency.

 

We presented a novel mechanism for generating neighborhood configuration in the simulated annealing algorithm to speed up the evolution of optimizing the diffractive optical element (DOE). With 60% time reduced, we still maintained similar high quality of images reconstructed from DOEs compared with the traditional SA method.

 

We have developed a modified hashing algorithm for the real time morning of insects locations on the fruits leaves. Results show that the fluctuation of Hamming distance is not only proportional to insect numbers, but also related to the location on the leaves.