Figure 2

The steps of image processing with Shanbhag thresholding method: (A) Original image, (B) Minimum filtered image, (C) Shanbhag thresholded image with automatically removed avascular zone, (D) Skeletonized image.

The steps of image processing with Shanbhag thresholding method: (A) Original image, (B) Minimum filtered image, (C) Shanbhag thresholded image with automatically removed avascular zone, (D) Skeletonized image.