Light field super resolution through controlled micro-shifts of light field sensor
This addresses resolution limitations for light field imaging applications, but it is incremental as it builds on existing multi-capture fusion methods.
The paper tackles the low spatial resolution problem in micro-lens array light field cameras by capturing and fusing multiple light fields with controlled sensor shifts, achieving improved spatial resolution through this approach.
Light field cameras enable new capabilities, such as post-capture refocusing and aperture control, through capturing directional and spatial distribution of light rays in space. Micro-lens array based light field camera design is often preferred due to its light transmission efficiency, cost-effectiveness and compactness. One drawback of the micro-lens array based light field cameras is low spatial resolution due to the fact that a single sensor is shared to capture both spatial and angular information. To address the low spatial resolution issue, we present a light field imaging approach, where multiple light fields are captured and fused to improve the spatial resolution. For each capture, the light field sensor is shifted by a pre-determined fraction of a micro-lens size using an XY translation stage for optimal performance.