Table 1 A summary of the mean error values \(\delta_{k}\) and the minimum, maximum values and standard deviations of the error \(\delta_{k}\) obtained for all the compared methods: Sobel, Roberts, Canny and the author’s (proposed) method of outer corneal edge detection in images from the Corvis® ST tonometer
From: A new method for detecting the outer corneal contour in images from an ultra-fast Scheimpflug camera
Method | δk (%) | δk(min) (%) | δk(max) (%) | std (%) |
|---|---|---|---|---|
Proposed | 0.16 | 0.09 | 3.62 | 0.19 |
Sobel | 3.43 | 0.25 | 42.12 | 6.21 |
Roberts | 5.78 | 0.17 | 61.67 | 9.19 |
Canny | 1.26 | 0.53 | 50.70 | 3.11 |