Distortionless UWB Antenna

Description
Ultra wideband (UWB) radio technology requires low power, offers high bandwidth efficiency, and is difficult to detect in covert applications compared to narrowband. It is used in radar imaging applications such as through-wall imaging, in internal medical diagnostics, environmental and weather monitoring, and security-related target tracking. Current UWB technologies rely on antennas that significantly distort […]

New Method for Single-Camera 3D Underwater Image Reconstruction

Description

Computer vision has become a popular method to explore the underwater environment. Underwater cameras are used for scientific exploration seafloor structure, monitoring undersea habitats, and inspecting industrial equipment. Camera calibration is required for recovering 3D geometry of a scene using 2D images. Despite the remarkable success for land-based camera systems, underwater camera calibration problems such as image distortion and […]

Non-Repeating Interval Sequences for Coded Imaging and Multi-User Communications

Description
Coded excitation is widely used in ultrasound, radar, sonar and other imaging systems as well as in communication systems. Coded excitation involves the transmission of long-duration pulses with a time-bandwidth product (TBP) greater than 1. By coding the pulse on transmission, the received signals may be processed to compress (decode) the effective impulse response, and […]

3D Reconstruction of Transparent and Reflective Objects

Description
3D object reconstruction is widely used in a number of industries to create a three dimensional digital model of a physical object.  Traditional acquisition systems rely on the expected light reflecting patterns off an object which can cause poor reconstruction when the object is transparent, reflective or refractive.  Researchers at the University of Alberta have […]

Novel Small-Area Low-Power Analog to Digital Converter for In-Pixel Data Conversion

Description
Most image sensors incorporate one analog-to-digital converter (ADC) per pixel array, or per column, to process a photodiode’s sensitive signal. The next generation of products aims to incorporate one ADC per pixel, which can result in higher contrast range and resolution, as well as sensitivity. The main challenge in pixel-level data conversion is producing a […]