Abstract
This paper presented a possible application of a digital image quality measure, called the Universal Quality Image Index Q, for the diagnostics of the eye fundus. The proposed method supports examination of the progression of macular degeneration allowing to reduce the number of errors during a subjective examination by an ophthalmologist. This occurs mostly when changes are small between successive examinations. This paper proposes an effective algorithm to eliminate the errors during the subjective assessment caused by inaccurate synchronization of examined images. DOI: http://dx.doi.org/10.5755/j01.eee.21.6.13766
Highlights
Eye fundus examination is one of the basic examinations in ophthalmology
A series of experiments was performed to verify the effectiveness of the algorithm synchronizing the digital images to allow to correlate the subjective assessment by an ophthalmologist with the objective assessment using the “Q” index
The process of correlation of the subjective assessment with the “Q” – base objective assessment no longer includes errors caused by absence of synchronization between the examined eye images of a patient
Summary
Manuscript received April 5, 2015; accepted September 12, 2015. There are many methods to assess the changes in the eye caused by AMD progression. A popular and most often used method is the subjective assessment by an ophthalmologist who analyses a digital image of retina and uses his/her experience to estimate the changes caused by the disease. One can note that the numerical value of the “Q” indices depends on loss of correlation, luminance distortion, and contrast distortion This is very important because thanks to it the index can be used to compare successive images with the reference image selected by the diagnostician. The patient gets the ophthalmological care; the examinations are made at certain time intervals for current control of the eye condition to apply a suitable therapy It is the time when an objective appraisal of the changes occurring between successive visits to the ophthalmologist becomes very important. The result was the “Q” values presented in Table I which were compared with the subjective assessment by the ophthalmologist – and the ophthalmologist uses only the following statements:
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