Sökning: "Inverse projection"
Hittade 5 uppsatser innehållade orden Inverse projection.
1. Limited angle reconstruction for 2D CT based on machine learning
Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI)Sammanfattning : The aim of this report is to study how machine learning can be used to reconstruct 2 dimensional computed tomography images from limited angle data. This could be used in a variety of applications where either the space or timeavailable for the CT scan limits the acquired data.In this study, three different types of models are considered. LÄS MER
2. Towards topology-aware Variational Auto-Encoders : from InvMap-VAE to Witness Simplicial VAE
Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)Sammanfattning : Variational Auto-Encoders (VAEs) are one of the most famous deep generative models. After showing that standard VAEs may not preserve the topology, that is the shape of the data, between the input and the latent space, we tried to modify them so that the topology is preserved. LÄS MER
3. Image Reconstruction Techniques using Kaiser Window in 2D CT Imaging
Master-uppsats, Linnéuniversitetet/Institutionen för fysik och elektroteknik (IFE)Sammanfattning : The traditional Computed Tomography (CT) is based on the Radon Transform and its inversion. The Radon transform uses parallel beam geometry and its inversion is based on the Fourier slice theorem. LÄS MER
4. Periodic Motion Extraction Using Harmonic Regression and Structural Parameterization
Master-uppsats, KTH/Skolan för datavetenskap och kommunikation (CSC)Sammanfattning : The work of this thesis focuses on how to construct a smooth and periodic motion from motion capture data of a motion with a periodic structure, such as walk cycles. To identify periodic structures in the motion capture data we rely on previously developed methods from algebraic topology to project each frame of the motion capture data onto a circle. LÄS MER
5. Visual Servoing Based on Learned Inverse Kinematics
Uppsats för yrkesexamina på grundnivå, Institutionen för systemteknikSammanfattning : Initially an analytical closed-form inverse kinematics solution for a 5 DOF robotic arm was developed and implemented. This analytical solution proved not to meet the accuracy required for the shape sorting puzzle setup used in the COSPAL (COgnitiveSystems using Perception-Action Learning) project [2]. LÄS MER