Sökning: "ransac"

Visar resultat 1 - 5 av 34 uppsatser innehållade ordet ransac.

  1. 1. Development of a Level-0 Geoprocessing Platform for a Multispectral Remote Sensing Payload

    Master-uppsats, KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

    Författare :Sergio Santiago Bernabeu Peñalba; [2022]
    Nyckelord :Infrared imagery; VIS; NIR; LWIR; geoprocessor; geolocation; quaternions; Aistech Space; image processing; ORB; RANSAC; Sentinel; Landsat; Infraröda bilder; VIS; NIR; LWIR; geoprocessor; geolokalisering; kvarternioner; Aistech Space; bildbehandling; ORB; RANSAC; Sentinel; Landsat;

    Sammanfattning : This thesis presented an overview of the development of a geolocating algorithm as part of a geoprocessor for raw satellite imagery. This algorithm was devised for and limited by the specifications of a state-of-the-art multispectral telescope designed by Aistech Space, hosted onboard the Guardian spacecraft, which will observe Earth through the visible, near infrared, and thermal infrared bands of the electromagnetic spectrum. LÄS MER

  3. 2. Analysing the quality of PlaneRCNN plane parameters using a structure from motion system

    Master-uppsats, Lunds universitet/Matematik LTH

    Författare :Fredrik Österberg; [2021]
    Nyckelord :structure from motion; PlaneRCNN; neural network; sfm; computer vision; RANSAC; planes; room reconstruction; Mathematics and Statistics; Technology and Engineering;

    Sammanfattning : This report aims to compare the plane parameters given by the PlaneRCNN network with those created by using a Structure from Motion (SfM) solution on the same data. Several datasets are used, and the results from PlaneRCNN are evaluated by using the camera matrices from the SfM solution and applying these along with scaling and coordinate transformations. LÄS MER

  4. 3. LiDAR-Equipped Wireless Sensor Network for Speed Detection on Classification Yards

    Kandidat-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Isak Olsson; André Lindgren; [2021]
    Nyckelord :LiDAR; Internet of Things IoT ; Wireless Sensor Networks WSN ; Classification yards; 6LoWPAN; RANSAC; LiDAR; Sakernas internet; Trådlösa sensornätverk; Rangerbangårdar; 6LoWPAN; RANSAC;

    Sammanfattning : Varje dag kopplas tusentals godsvagnar om på de olika rangerbangårdarna i Sverige. För att kunna automatiskt bromsa vagnarna tillräckligt mycket är det nödvändigt att veta deras hastigheter. En teknik som har blivit populär på sistone är Light Detection and Ranging (LiDAR) som använder ljus för att mäta avstånd till objekt. LÄS MER

  5. 4. Unsupervised Learning for Structure from Motion

    Master-uppsats, Linköpings universitet/Datorseende

    Författare :Erik Örjehag; [2021]
    Nyckelord :sfm; structure from motion; depth; ego-motion; unsupervised learning; consensus maximization;

    Sammanfattning : Perception of depth, ego-motion and robust keypoints is critical for SLAM andstructure from motion applications. Neural networks have achieved great perfor-mance in perception tasks in recent years. But collecting labeled data for super-vised training is labor intensive and costly. LÄS MER

  7. 5. Robust Registration of ToF and RGB-D Camera Point Clouds

    Master-uppsats, KTH/Fastigheter och byggande

    Författare :Shuo Chen; [2021]
    Nyckelord :Robustness; Estimator; Feature extraction; RANSAC; BLAVE; M-estimator; ToF; RGB-D; Robusthet; Uppskattare; Särdragsextraktion; RANSAC; BLAVE; M-uppskattare; ToF; RGB-D;

    Sammanfattning : This thesis presents a comparison of M-estimator, BLAVE, and RANSAC method in point clouds registration. The comparison is performed empirically by applying all the estimators on a simulated data added with noise plus gross errors, ToF data and RGB-D data. The RANSAC method is the fastest and most robust estimator from the comparison. LÄS MER