Browsing NTNU Open by Author "Zhang, Qin"
Now showing items 1-7 of 7
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A system for automated vision-based sea-ice concentration detection and floe-size distribution indication from an icebreaker
Heyn, Hans-Martin; Knoche, Martin; Zhang, Qin; Skjetne, Roger (Chapter; Peer reviewed, 2017)This paper presents a ship-mounted multi-lens camera system for sea-ice monitoring and algorithms to automatically evaluate the sea-ice concentration and to indicate the floe-sizes in a radius of 100 meter around the vessel. ... -
Automatic image segmentation for boundary detection of apparently connected sea-ice floes
Zhang, Qin; Skjetne, Roger; Su, Biao (Chapter, 2013)Ice concentration, ice types, and floe size distribution are three important factors in the analysis of ice-structure interaction in a broken ice field. The use of cameras as sensors for offshore operations in ice-covered ... -
Deep-learning algorithms for estimation of fish-population parameters from stereo vision video data
Jakobsen, Stian Mjelde (Master thesis, 2023)Denne masteroppgaven fokuserer på å analysere hvordan fiskeadferd påvirkes av undervannsstrukturer med varierende former og farger, hovedsakelig målt i form av avstanden de opprettholder fra strukturen. For å sikre robusthet ... -
Farmed Atlantic salmon (Salmo salar L.) avoid intrusive objects in cages: The influence of object shape, size and colour, and fish length
Zhang, Qin; Bloecher, Nina; Evjemo, Linn Danielsen; Føre, Martin; Su, Biao; Eilertsen, Espen; Mulelid, Mats Aarsland; Kelasidi, Eleni (Peer reviewed; Journal article, 2024)Underwater vehicles and other mobile platforms are seeing increased use as tools within fish farming, particularly due to current trends towards Precision Farming practices, and more exposed farming sites. Although many ... -
Image Processing for Ice Floe Analyses in Broken-ice Model Testing
Zhang, Qin; Skjetne, Roger; Metrikin, Ivan; Løset, Sveinung (Journal article; Peer reviewed, 2015)The ice floe shape and size distribution are important ice parameters in ice-structure analyses. Before performing an analysis at full scale, the dynamic positioning (DP) experiments in model ice at the Hamburg Ship Model ... -
Image Processing for Ice Parameter Identification in Ice Management
Zhang, Qin (Doctoral thesis at NTNU;2015:340, Doctoral thesis, 2015)Various types of remotely sensed data and imaging technology will aid the development of sea-ice observation to, for instance, support estimation of ice forces critical to Dynamic Positioning (DP) operations in Arctic ... -
Image Techniques for Identifying Sea-Ice Parameters
Zhang, Qin; Skjetne, Roger (Journal article; Peer reviewed, 2014)The estimation of ice forces are critical to Dynamic Positioning (DP) operations in Arctic waters. Ice conditions are important for the analysis of ice-structure interaction in an ice field. To monitor sea-ice conditions, ...