Abstract:
The present invention provides a method for transmitting pilots in a multi-carrier wireless transmission system. A wireless time-frequency transmission block is composed of N consecutive OFDM symbols in time domain and M consecutive physical sub-carriers in frequency domain, N and M are integers those are greater than or equal to 1. The method includes: partitioning the wireless time-frequency transmission block into several areas, and determining the position of pilots, of which the total number is a preset number, according to the time-frequency domain balancing principle of pilots of various antennas in various areas; inserting pilots at the pilot positions of each antenna corresponding to the antenna for transmission. In accordance with the present invention, the simultaneous transmission of multiple antennas is supported in a wireless time-frequency transmission block of a multi-carrier wireless transmission system.
Abstract:
A method for detecting a clear path of travel for a vehicle utilizing an image generated by a camera device located upon the vehicle includes monitoring the image, and generating a plurality of patches onto the image, wherein the patches are collectively arranged to substantially include the clear path of travel. Feature extraction is utilized to analyze the patches and includes convolving each of the patches with a feature detection filter generating a feature-based filter response, extracting features based upon the feature-based filter response, and determining each of the patches to represent the clear path of travel or to not represent the clear path of travel based upon the extracted features. The clear path of travel is determined based upon the plurality of patches, and is utilized to navigate the vehicle.
Abstract:
An example-based 2D to 3D image conversion method, a computer readable medium therefore, and a system are provided. The embodiments are based on an image database with depth information or with which depth information can be generated. With respect to a 2D image to be converted into 3D content, a matched background image is found from the database. In addition, graph-based segmentation and comparison techniques are employed to detect the foreground of the 2D image so that the relative depth map can be generated from the foreground and background information. Therefore, the 3D content can be provided with the 2D image plus the depth information. Thus, users can rapidly obtain the 3D content from the 2D image automatically and the rendering of the 3D content can be achieved.
Abstract:
An apparatus having an optical reader system and method for label-independent detection having improved spatial resolution of the reader, as defined herein. The system includes an optical configuration for interrogating a sensor on a microplate at an incident angle (θ1) of greater than 45°, and recording the image received from the contacted sensor with the image recorder, the image recorder being oriented with respect to the reflected beam at a reflected angle (θ2) of greater than about 5°, as further defined herein.
Abstract:
An optical sensor for label-independent detection, having improved spatial resolution and reduced angular sensitivity, the sensor including: a substrate; a waveguide grating adjacent the substrate; and a waveguide coat layer adjacent or over the waveguide grating, the waveguide coat layer having a thickness (W) of from 30 nm to 300 nm, the waveguide grating having a teeth height (H) of from 0.2×W to 1×W, and for example, a waveguide core thickness (Wcore=W−H) from 5 nm to 50 nm. Also disclosed is a well-plate article, a well-plate reader system, and methods of using the well-plate and sensor articles, as defined herein.
Abstract:
A system and method as defined herein for dual-detection of evanescent-wave label-free light and evanescent-wave excited-fluorescent label-emitted light in an optical biosensor.
Abstract:
A method is provided for removing an illumination generated shadow in a captured image. Each pixel of the captured input image is plotted on a two dimensional logarithmic graph. A linear axis for the plurality of color sets is determined that is substantially orthogonal to a respective illumination direction of each respective color set. A log-chromaticity value of each plotted pixel is projected on the axis. An orientation of the linear axis is selected to minimize an illumination effect and provide optimum separation between each of the respective color sets on the linear axis. Edges in the input image and illumination invariant image domain are identified. The identified edges of the input image are compared to identify edges in the illumination invariant image domain. A determination is made whether a shadow edge is present in response to the comparison. A shadow-reduced image is generated for scene analysis by a vehicle vision-based system.
Abstract:
Method and apparatus for laser scoring a sheet material. An elongated laser beam having S-mode intensity profile in the width direction and a flat-top-mode profile in the length direction is used to achieve high precision scoring. The invention can be used for scoring large-size glass substrates for LCD displays.