Estimation of visual focus for control of a FOA-based image coder
Independent thesis Basic level (professional degree)Student thesisAlternative title
Estimering av visuellt fokus för kontroll av en FOA-baserad bildkodare (Swedish)
A major feature of the human eye is the compressed sensitiveness of the retina. An image coder, which makes use of this, can heavily encode the parts of the image which is not close to the focus of our eyes. Existing image coding schemes require that the gaze direction of the viewer is measured. However, a great advantage would be if an estimator predicts the focus of attention (FOA) regions in the image.
This report presents such an implementation, which is based on a model that mimics many of the biological features of the human visual system (HVS). For example, it uses a center-surround mechanism, which is a replica of the receptive fields of the neurons in the HVS.
An extra feature of the implementation is the extension to handle video sequences, and the expansion of the FOA:s. The test results of the system show good results from a large variety of images.
Place, publisher, year, edition, pages
Institutionen för systemteknik , 2003. , 49 p.
Technology, image coding, focus of attention, saliency map, FOA expansion
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-2032OAI: oai:DiVA.org:liu-2032DiVA: diva2:19360