A full photometric and geometric model for attached webcam/matte screen devices

作者：

Highlights：

• We provide a closed-form expression for the lighting emitted by an infinitely small planar light source.

• This infinitesimal model is extended to arbitrary extended planar illuminants.

• The lighting model can be used to model light emitted by a screen displaying graylevel images.

• A thorough geometrical study of webcam/screen devices is provided.

• Both photometric and geometric applications are validated in a photometric stereo application with extended sources.

摘要

Highlights•We provide a closed-form expression for the lighting emitted by an infinitely small planar light source.•This infinitesimal model is extended to arbitrary extended planar illuminants.•The lighting model can be used to model light emitted by a screen displaying graylevel images.•A thorough geometrical study of webcam/screen devices is provided.•Both photometric and geometric applications are validated in a photometric stereo application with extended sources.

论文关键词：Lighting,Camera calibration,Photometric stereo,Extended sources

论文评审过程：Received 28 February 2015, Revised 11 August 2015, Accepted 14 November 2015, Available online 21 November 2015, Version of Record 1 December 2015.

论文官网地址：https://doi.org/10.1016/j.image.2015.11.006