Abstract：
:In this paper, we propose the use of multiscale amplitude-modulation-frequency-modulation (AM-FM) methods for discriminating between normal and pathological retinal images. The method presented in this paper is tested using standard images from the early treatment diabetic retinopathy study. We use 120 regions of 40 x 40 pixels containing four types of lesions commonly associated with diabetic retinopathy (DR) and two types of normal retinal regions that were manually selected by a trained analyst. The region types included microaneurysms, exudates, neovascularization on the retina, hemorrhages, normal retinal background, and normal vessels patterns. The cumulative distribution functions of the instantaneous amplitude, the instantaneous frequency magnitude, and the relative instantaneous frequency angle from multiple scales are used as texture feature vectors. We use distance metrics between the extracted feature vectors to measure interstructure similarity. Our results demonstrate a statistical differentiation of normal retinal structures and pathological lesions based on AM-FM features. We further demonstrate our AM-FM methodology by applying it to classification of retinal images from the MESSIDOR database. Overall, the proposed methodology shows significant capability for use in automatic DR screening.
journal_name
IEEE Trans Med Imagingjournal_title
IEEE transactions on medical imagingauthors
Agurto C,Murray V,Barriga E,Murillo S,Pattichis M,Davis H,Russell S,Abramoff M,Soliz Pdoi
10.1109/TMI.2009.2037146subject
Has Abstractpub_date
2010-02-01 00:00:00pages
502-12issue
2eissn
0278-0062issn
1558-254Xjournal_volume
29pub_type
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