Methods and apparatus for image processing, and laser scanning ophthalmoscope having an image processing apparatus

摘要

A laser scanning ophthalmoscope obtains images of a retina. An image is processed by (i) mapping an image along a one dimensional slice; (ii) computing a wavelet scalogram of the slice; (iii) mapping ridge features from the wavelet scalogram; repeating steps (i), (ii) and (iii) for one or more mapped image slices. The mapped ridge features from the slices are superimposed. Textural information is derived from the superimposed mapped ridge features. The analysis can be tuned to detect various textural features, for example to detect image artifacts, or for retinal pathology classification.

主权项

1. A method of image processing, the method comprising:
(i) selecting, via a processor, a one dimensional slice from an image represented by image data from an image sensor; (ii) computing, via the processor, a wavelet scalogram of the slice; (iii) identifying, via the processor, ridge features within the wavelet scalogram; repeating steps (i), (ii) and (iii) for one or more further slices; superimposing, via the processor, the identified ridge features from the slices; and deriving, via the processor, textural information from said superimposed identified ridge features.