Essays about: "thinning algorithms"

Showing result 1 - 5 of 6 essays containing the words thinning algorithms.

  1. 1. Implementering av Skogliga Grunddata i hprGallring vid andragallring

    University essay from SLU/School for Forest Management

    Author : Felix Nilsson; Joakim Bengtsdahl; [2023]
    Keywords : gallring; uppföljning; laserskanning;

    Abstract : Gallring är en av de skogsvårdsåtgärder som utförs i våra skogar för att bemöta de olika skogliga mål som skogsägarna har för sin skog. I Sveriges skogar så utförs gallringsåtgärder på ca 400 000 hektar årligen. READ MORE

  3. 2. Robotics Approach in Mobile Laser Scanning : Generation of Georeferenced Point-based Forest Models

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Tamas Faitli; [2023]
    Keywords : mobile laser scanning; rotating lidar; slam; real-time positioning; georeferencing; state estimation; lidar odometry; point-based forest model; forest harvester; forestry; mobil laserskanning; roterande lidar; slam; realtidspositionering; georeferens; tillståndsuppskattning; lidarodometri; punktbaserad skogsmodell; skogsskördare; skogsbruk;

    Abstract : A mobile laser scanning (MLS) system equipped with a lidar, inertial navigation system and satellite positioning can be used to reconstruct georeferenced point-based models of the surveyed environments. Ideal reconstruction requires accurate trajectories that are challenging to obtain in forests. READ MORE

  4. 3. ALS (Airborne Lidar) accuracy: Can potential low data quality of Lidar ground points be modelled/detected based on recorded point cloud characteristics? Case study of 2016 Lidar capture over Auckland, New Zealand

    University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

    Author : Gabriela Olekszyk; [2022]
    Keywords : Geography; GIS; Lidar; ALS; Point cloud; Accuracy; Quality; Technology and Engineering;

    Abstract : Gabriela Olekszyk ALS (Airborne Lidar) accuracy: Can potential low data quality of Lidar ground points be modelled/detected based on recorded point cloud characteristics? Case study of 2016 Lidar capture over Auckland, New Zealand. Lidar (Light Detection and Ranging) data is becoming more widely available and accessible. READ MORE

  5. 4. Fingerprint image enhancement and minutiae extraction algorithm

    University essay from Linnéuniversitetet/Institutionen för fysik och elektroteknik (IFE)

    Author : Letian Cao; Yazhou Wang; [2017]
    Keywords : Fingerprints; Minutiae; Algorithm; Simulation; Normalization; Segmentation; Orientation; Extraction; Binarization; Thinning;

    Abstract : This work aims to study the procedures of fingerprint identification system and to present some efficient algorithms for pre-processing and minutiae extraction. Most pre-processing steps consist of normalization, segmentation and orientation estimation, and background which focus on decreasing the variance of fingerprints, separating fore and background areas and tracking the direction of ridge lines, respectively. READ MORE

  6. 5. Examination of Various Approaches to Possibly Improve the Existing Algorithms Applied in Fingerprint Recognition Systems

    University essay from Blekinge Tekniska Högskola/Avdelningen för signalbehandling

    Author : Gorka Treceño Fontecha; Beatriz Mora Barbero.; [2007]
    Keywords : Fingerprint Recognition;

    Abstract : In human fingerprints there are plenty of small details which are the discontinuities in the ridges, denoted minutiae. Minutiae-based matching is a wellknown method applied in fingerprint recognition. Minutiae defines a representative feature vector of a fingerprint. READ MORE