Publications by Alireza Ghasemi

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Since the invention of first camera, people have always thought of new ways to capture moments. With the advent of digital photography, not only imaging systems have progressed, but also technology provides new user experience. The recently introduced ligh ...

Achieving perfect scale-invariance is usually not possible using classical color image features. This is mostly because of the fact that a traditional image is a two-dimensional projection of the real world. In contrast, light field imaging makes available ...

We present LCAV-31, a multi-view object recognition dataset designed specifically for benchmarking light field image analysis tasks. The principal distinctive factor of LCAV-31 compared to similar datasets is its design goals and availability of novel visu ...

We propose a novel approach for detecting printed photos from natural scenes using a light-field camera. Our approach exploits the extra information captured by a light-field camera and the multiple views of scene in order to infer a compact feature vector ...

Using more than one camera to capture a scene has a long history in photography and the imaging industry. Inspired by how the human eye operates, researchers and industrial companies have always tried to compensate for the 3-D information lost during the c ...

We study the accuracy of triangulation in multi-camera systems with respect to the number of cameras. We show that, under certain conditions, the optimal achievable reconstruction error decays quadratically as more cameras are added to the system. Furtherm ...

Although many advances have been made in light-field and camera-array image processing, there is still a lack of thorough analysis of the localisation accuracy of different multi-camera systems. By considering the problem from a frame-quantisation perspect ...

We propose a novel camera pose estimation or perspective-n-point (PnP) algorithm, based on the idea of consistency regions and half-space intersections. Our algorithm has linear time-complexity and a squared reconstruction error that decreases at least qua ...

Alireza Ghasemi

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Computationally efficient background subtraction in the light field domain

Scale-invariant representation of light field images for object recognition and tracking

LCAV-31: a dataset for light field object recognition

Detecting Planar Surface Using a Light-Field Camera with Application to Distinguishing Real Scenes From Printed Photos

Bound and Conquer : Properties, Algorithms, and Applications of Multi-Camera Imaging

Bound and Conquer: Improving Triangulation by Enforcing Consistency

On the Accuracy of Point Localisation in a Circular Camera-Array

SHAPE: Linear-Time Camera Pose Estimation With Quadratic Error-Decay