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Attentional perceptual thresholds for manipulated digitized mammograms

Maeder, Anthony J. & Fookes, Clinton B. (2004) Attentional perceptual thresholds for manipulated digitized mammograms. In Medical imaging 2004. Image processing : 16-19 February 2004, San Diego, California, USA : SPIE International Symposium on Medical Imaging, 14-19 February 2004, San Diego, Calif..

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Abstract

This paper describes a series of experiments to investigate influence of perceptual response in skilled observers, due to subtle pixel intensity transforms in radiological images. Contrast and edge enhancement operations were applied to digitized mammograms, in order to determine thresholds at which variations in attentional behaviour not consciously identified by the observer were detected, during normal visual scanning procedures in a typical screening viewing situation. Continuous tracking of eye movements was undertaken to obtain patterns of fixation sequences and durations for three different observers, and both qualitative and quantitative analyses were applied to this data. Consistent thresholds at which attentional perturbation occurred were established based on levels of aggregated pixel errors determined by SNR values, across the different methods of image manipulation considered.

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ID Code: 17893
Item Type: Conference Paper
Keywords: Attention, Fixation, Eye movement, image enhancement, mammogram screening
ISBN: 0819452831
Subjects: Australian and New Zealand Standard Research Classification > INFORMATION AND COMPUTING SCIENCES (080000) > ARTIFICIAL INTELLIGENCE AND IMAGE PROCESSING (080100) > Artificial Intelligence and Image Processing not elsewhere classified (080199)
Australian and New Zealand Standard Research Classification > INFORMATION AND COMPUTING SCIENCES (080000) > ARTIFICIAL INTELLIGENCE AND IMAGE PROCESSING (080100) > Image Processing (080106)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Engineering Systems
Copyright Owner: Copyright 2004 SPIE
Copyright Statement: Reproduced in accordance with the copyright policy of the publisher
Deposited On: 17 Feb 2009 11:18
Last Modified: 09 Jun 2010 23:22

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