High-Accuracy Correction of a Microlens Array for Plenoptic Imaging Sensors

Area of Science:

• Optics and Photonics
• Computer Vision
• Image Processing

Background:

• Microlens array (MLA) errors in plenoptic cameras disrupt 4D spatio-angular information.
• This disruption significantly impacts target reconstruction accuracy and efficiency.

Purpose of the Study:

• To present a high-accuracy correction method for light fields affected by MLA errors.
• To address both form and orientation errors in MLA.

Main Methods:

• Extraction of subpixel feature points from microlens subimages.
• Generation of correction matrices for subpixel-level registration of subimages.

Main Results:

• Accurate rectification of geometric and intensity distortions in raw light-field images.
• Demonstrated improvement in the quality of light-field refocusing.
• Verified accuracy, stability, and adaptability of the correction method.

Conclusions:

• The proposed method effectively corrects MLA errors in light-field images.
• The correction enhances the overall quality and reliability of plenoptic camera data.
• This work contributes to more accurate 4D information retrieval and reconstruction.