Investigation into Image Degradation Due to Effects of Defocus

Abstract

Depth of field is common in photography and is used to draw attention to objects within a photo. Depth of field is not always intended since the blur degrades the quality of regions within the photo that are out of focus. This paper investigates algorithms for the recovery images which have been degraded by defocus. The techniques investigate some algorithms and evaluate limiting factors in recovery such as quantization of images and additive noise inherent to photographs. The paper also investigates models that are used to render defocused scenes in order to understand the process. The models investigated are evaluated in terms of quality of realism and what information needs to be used from object space and image space in order to optimize the efficiency.

Participants

Technical Reports

[1] Duncan Phillips. An investigation into image degradation due to effects of defocus. Technical Report Honours Project Report, Virtual Reality Special Interest Group, Computer Science Department, Rhodes University, Grahamstown, South Africa, November 2006. [PDF] [BibTeX]

[2] Stephen Hawkridge. Development of a super resolution image enhancement plug-in for the GIMP. Technical Report Honours Project Report, Virtual Reality Special Interest Group, Computer Science Department, Rhodes University, Grahamstown, South Africa, November 2006. [PDF] [BibTeX]

Images