Paper Info
Title
A Pupil-Centric Model of Image Formation
Abstract
This paper has been prompted by observations of some anomalies in the performance of the standard imaging models (pin-hole, thin-lens and Gaussian thick-lens), in the context of composing omnifocus images and estimating depth maps from a sequence of images. A closer examination of the models revealed that they assume a position of the aperture that conflicts with the designs of many available lenses. We have shown in this paper that the imaging geometry and photometric properties of an image are significantly influenced by the position of the aperture. This is confirmed by the discrepancies between observed mappings and those predicted by the models. We have therefore concluded that the current imaging models do not adequately represent practical imaging systems. We have proposed a pupil-centric model of image formation, which overcomes these deficiencies and have given the associated mappings. The impact of this model on some common imaging scenarios is described, along with experimental verification of the better performance of the model on three real lenses.
Year
DOI
Venue
2002
10.1023/A:1016324132583
International Journal of Computer Vision
Keywords
Field
DocType
image model,pin-hole,thin-lens,Gaussian thick-lens,aperture position,camera design,depth from (de)focus,entrance end exit pupils
Aperture,Computer vision,Thin lens,Computer graphics (images),Computer science,Photometry (optics),Pupil,Image formation,Gaussian,Lens (optics),Artificial intelligence
Journal
Volume
Issue
ISSN
48
3
1573-1405
Citations 
PageRank 
References 
11
0.81
8
Authors
2
Name
Order
Citations
PageRank
Manoj Aggarwal11228.86
Narendra Ahuja27726956.74