Georgios Evangelidis

EfficientFormer: Vision Transformers at MobileNet Speed

Vision Transformers (ViT) have shown rapid progress in computer vision tasks, achieving promising results on various benchmarks. However, due to the massive number of parameters and model design,...

Rethinking Vision Transformers for MobileNet Size and Speed

With the success of Vision Transformers (ViTs) in computer vision tasks, recent arts try to optimize the performance and complexity of ViTs to enable efficient deployment on mobile devices....

An Overview of Depth Cameras and Range Scanners Based on Time-of-Flight Technologies

Time-of-flight (TOF) cameras are sensors that can measure the depths of scene-points, by illuminating the scene with a controlled laser or LED source, and then analyzing the reflected light. In...

Revisiting visual-inertial structure from motion for odometry and SLAM initialization

In this paper, an efficient closed-form solution for the state initialization in visual-inertial odometry (VIO) and simultaneous localization and mapping (SLAM) is presented. Unlike the...

Renormalization for Initialization of Rolling Shutter Visual-Inertial Odometry

In this paper we deal with the initialization problem of a visual-inertial odometry system with rolling shutter cameras. Initialization is a prerequisite for using inertial signals and fusing them...

Ego-Motion Alignment from Face Detections for Collaborative Augmented Reality

Sharing virtual content among multiple smart glasses wearers is an essential feature of a seamless Collaborative Augmented Reality experience. To enable the sharing, local coordinate systems of...

Robust Head-Pose Estimation Based on Partially-Latent Mixture of Linear Regressions

Head-pose estimation has many applications, such as social event analysis, human-robot and human-computer interaction, driving assistance, and so forth. Head-pose estimation is challenging because...

Continuous Action Recognition Based on Sequence Alignment

Continuous action recognition is more challenging than isolated recognition because classification and segmentation must be simultaneously carried out. We build on the well known dynamic time...

Automatic Detection of Calibration Grids in Time-of-Flight Images

It is convenient to calibrate time-of-flight cameras by established methods, using images of a chequerboard pattern. The low resolution of the amplitude image, however, makes it difficult to...

Cross-calibration of Time-of-flight and Colour Cameras

Time-of-flight cameras provide depth information, which is complementary to the photometric appearance of the scene in ordinary images. It is desirable to merge the depth and colour information,...

J2J-GR: Journal-to-Journal References by Greek Researchers

Rethinking Vision Transformers for MobileNet Size and Speed

Efficient implementation of a video change detection algorithm

Applying General-Purpose Data Reduction Techniques for Fast Time Series Classification

Improving Data Reduction by Merging Prototypes

Dynamic k-NN Classification Based on Region Homogeneity

Generating Fixed-Size Training Sets for Large and Streaming Datasets

Fast Tree-Based Classification via Homogeneous Clustering