Blar i SINTEF Open på forfatter "Kirkhus, Trine"
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A DMD (Digital Micro-Mirror Device) Based Multi-Object Quasi-Imaging Spectrometer
Kirkhus, Trine; Fismen, Britta Grennberg; Skotheim, Øystein; Tschudi, Jon (Lecture, 2009)In order to increase flexibility in spectral measurements performed by a point detector spectrometer, we are using digital micro-mirror devices (DMD) to selectively both illuminate and pick out regions of interest from a ... -
A Motion based Real-time Foveation Control Loop for Rapid and Relevant 3D Laser Scanning
Breivik, Gøril M.; Thielemann, Jens T; Berge, Asbjørn; Skotheim, Øystein; Kirkhus, Trine (Lecture, 2011)We present an implementation of a novel foveating 3D sensor concept, inspired by the human eye, which intends to allow future robots to better interact with their surroundings. The sensor is based on a time-of-flight laser ... -
A Motion based Real-time Foveation Control Loop for Rapid and Relevant 3D Laser Scanning
Breivik, Gøril Margrethe; Thielemann, Jens T; Berge, Asbjørn; Skotheim, Øystein; Kirkhus, Trine (Chapter, 2011)We present an implementation of a novel foveating 3D sensor concept, inspired by the human eye, which intends to allow future robots to better interact with their surroundings. The sensor is based on a time-of-flight laser ... -
Adaptive Structured Light with Scatter Correction for High-Precision Underwater 3D Measurements
Risholm, Petter; Kirkhus, Trine; Thielemann, Jens T; Thorstensen, Jostein Bruun (Peer reviewed; Journal article, 2019): High-precision underwater 3D cameras are required to automate many of the traditional subsea inspection, maintenance and repair (IMR) operations. In this paper we introduce a novel multi-frequency phase stepping ... -
Automatic length estimation of free-swimming fish using an underwater 3D range-gated camera
Risholm, Petter; Mohammed, Ahmed Kedir; Kirkhus, Trine; Clausen, Sigmund; Vasilyev, Leonid; Folkedal, Ole; Johnsen, Øistein; Haugholt, Karl Henrik; Thielemann, Jens T (Peer reviewed; Journal article, 2022)Camera estimation of fish size in aquaculture production and fisheries is crucial for enabling knowledge-based decision making. Automatic estimation of fish lengths on an individual and population basis are key steps to ... -
Calibration of a Multi-Object Spectrometer with Programmable and Arbitrary Field of View
Kirkhus, Trine; Fismen, Britta Grennberg; Tschudi, Jon; O'Farrell, Marion (Lecture, 2010)Employing digital micro-mirror devices to simultaneously select illumination and detection regions, increases flexibility in spectral measurements. We present a method for collecting regional reference spectra, for optimum ... -
Modelling and Compensating Measurement Errors Caused by Scattering in Time-Of-Flight Cameras
Kirkhus, Trine (Lecture, 2008)Recently, Range Imaging (RIM) cameras have become available that capture high resolution range images at video rate. Such cameras measure the distance from the scene for each pixel independently based upon a measured time ... -
Modelling and Compensating Measurement Errors Caused by Scattering in Time-Of-Flight Cameras
Kavli, Tom; Kirkhus, Trine; Thielemann, Jens T; Jagileski, Borys (Chapter, 2008)Recently, Range Imaging (RIM) cameras have become available that capture high resolution range images at video rate. Such cameras measure the distance from the scene for each pixel independently based upon a measured time ... -
ROV Navigation in a Fish Cage with Laser-Camera Triangulation
Bjerkeng, Magnus Christian; Kirkhus, Trine; Caharija, Walter; Thielemann, Jens T; Amundsen, Herman Biørn; Ohrem, Sveinung Johan; Grøtli, Esten Ingar (Peer reviewed; Journal article, 2021)Aquaculture net cage inspection and maintenance is a central issue in fish farming. Inspection using autonomous underwater vehicles is a promising solution. This paper proposes laser-camera triangulation for pose estimation ...