An Approach to Evaluate Blurriness in Retinal Images with Vitreous Opacity for Cataract Diagnosis

Table 1

Feature description of cataract grading.

Feature parameter	Description
v1	Number of visible retinal structure pixels; segmented with threshold t1
v2	Number of visible retinal structure pixels; segmented with threshold t2
v3	Number of visible retinal structure pixels; segmented with threshold t3
v4	Number of visible retinal structure pixels; segmented with threshold t4
m1	Mean enhanced value of segmented visible; retinal structures with threshold t1
m2	Mean enhanced value of segmented visible; retinal structures with threshold t2
m3	Mean enhanced value of segmented visible; retinal structures with threshold t3
m4	Mean enhanced value of segmented visible; retinal structures with threshold t4
d	Average value of the local standard deviation