A fast-Fourier-transform method of topography and interferometry is proposed. By computer processing of a noncontour type of fringe pattern, automatic discrimination is achieved between elevation and depression of the object or wave-front form, which has not been possible by the fringe-contour-generation techniques. The method has advantages over moire topography and conventional fringe-contour interferometry in both accuracy and sensitivity. Unlike fringe-scanning techniques, the method is easy to apply because it uses no moving components.

Fourier-transform method of fringe-pattern analysis for computer-based topography and interferometry

Current medical imaging technologies allow visualization of tissue anatomy in the human body at resolutions ranging from 100 micrometers to 1 millimeter. These technologies are generally not sensitive enough to detect early-stage tissue abnormalities associated with diseases such as cancer and atherosclerosis, which require micrometer-scale resolution. Here, optical coherence tomography was adapted to allow high-speed visualization of tissue in a living animal with a catheter-endoscope 1 millimeter in diameter. This method, referred to as "optical biopsy," was used to obtain cross-sectional images of the rabbit gastrointestinal and respiratory tracts at 10-micrometer resolution.

In Vivo Endoscopic Optical Biopsy with Optical Coherence Tomography

Systems and methods for implementing array cameras configured to perform super- resolution processing to generate higher resolution super-resolved images using a plurality of captured images and lens stack arrays that can be utilized in array cameras are disclosed. Lens stack arrays in accordance with many embodiments of the invention include lens elements formed on substrates separated by spacers, where the lens elements, substrates and spacers are configured to form a plurality of optical channels, at least one aperture located within each optical channel, at least one spectral filter located within each optical channel, where each spectral filter is configured to pass a specific spectral band of light, and light blocking materials located within the lens stack array to optically isolate the optical channels.

Capturing and processing of images using monolithic camera array with heterogeneous imagers

An image processing apparatus and image processing method capable of providing a high-resolution image for a desired position by use of light field data are provided. The image processing apparatus may determine a position of a portion of light field data among light field data corresponding to a scene, according to a desired focusing position, generate a refocusing first image by use of the position determined portion of light field data, generate a high-resolution image having a predetermined setting ratio relative to the refocusing first image, determine a ratio for local synthesis between the high-resolution image and an enlarged image of the refocusing first image by use of a similarity with respect to the position determined portion of light field data, and generate a synthesized image by synthesizing the high-resolution image and the enlarged image of the refocusing first image according to the local synthesis ratio.

Image processing apparatus and method

There are many, many inventions described herein. In one aspect, what is disclosed is a digital camera including a plurality of arrays of photo detectors, including a first array of photo detectors to sample an intensity of light of a first wavelength and a second array of photo detectors to sample an intensity of light of a second wavelength. The digital camera further may also include a first lens disposed in an optical path of the first array of photo detectors, wherein the first lens includes a predetermined optical response to the light of the first wavelength, and a second lens disposed in with an optical path of the second array of photo detectors wherein the second lens includes a predetermined optical response to the light of the second wavelength. In addition, the digital camera may include signal processing circuitry, coupled to the first and second arrays of photo detectors, to generate a composite image using (i) data which is representative of the intensity of light sampled by the first array of photo detectors, and (ii) data which is representative of the intensity of light sampled by the second array of photo detectors; wherein the first array of photo detectors, the second array of photo detectors, and the signal processing circuitry are integrated on or in the same semiconductor substrate.

Apparatus for multiple camera devices and method of operating same

A visualization technique of sound wave propagation using digital holography with heterodyne technique is presented. In the proposed method, the frequency of the interference pattern in an off-axis digital holography is down converted into the detectable frequency in an image sensor operated at the video frame rate by using the heterodyne interferometer. We present the principle of the recording technique and experimental results are described.

Optical sound wave recording by digital holography with heterodyne technique

A graphic processing unit (GPU) is much attractive for large scale information processing. Especially, a GPU
is considered to be suitable for SIMD processing to image data. We have developed some methods based on
SIMD pattern processing and study on implementation of these methods. In this research, design of GPU
implementation for the traveling salesman problem (TSP) is reported. Usefulness of GPU implementation is
shown by verification.

Implementation of the TSP based on pattern processing with a graphic processing unit

Recording density of a reflection-type holographic memory system can be improved by use of random phase shift multiplexing. A recording interval of 1.0 ?m was achieved in a 0.5 mm thick Fe:LiNbO3.

Improvement on recording density in reflection-type holographic memory with random phase shift multiplexing

For the reconstruction of absorber embedded in a homogeneous scattering medium, a backprojection method using intensity ratio is evaluated numerically. The proposed method uses the intensity ratio between an object medium and a reference medium.

Assessment of reconstruction method of absorber in scattering medium using intensity ratio

An optical method to improve the system for modulo exponentiation is proposed. In this method, modulation patterns are modified in comparison with that of our original system. The proposed method is numerically analyzed and effectiveness of the method is verified.

http://ieeexplore.ieee.org/iel5/6097354/6110253/06110365.pdf

Kouichi Nitta

Papers

Optical sound wave recording by digital holography with heterodyne technique

Implementation of the TSP based on pattern processing with a graphic processing unit

Improvement on recording density in reflection-type holographic memory with random phase shift multiplexing

Assessment of reconstruction method of absorber in scattering medium using intensity ratio

Improvement of modulation patterns in a method for parallel modulo exponentiation with optical amplitude modulation