Table 4.
Categorization optic disc with optic cup segmentation methods.
| Authors | Year | Image processing technique | OD/OC | Performance metrics | Datasets | Number of images |
|---|---|---|---|---|---|---|
| Wong et al. [58] | 2008 | Variational level-set approach | OD/OC | CDR | SERI | 104 |
|
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| Wong et al. [59] | 2009 | Vessel kinking | OD/OC | CDR | SERI | 27 |
|
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| Narasimhan and Vijayarekha [60] | 2011 | K-mean clustering | OD/OC | CDR-ISNT ratio | AEH | 36 |
|
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| Ho et al. [61] | 2011 | Inpainting and active contour model | OD/OC | CDR-ISNT ratio | CMUH | N/A |
|
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| Mishra et al. [62] | 2011 | Active contour method | OD/OC | CDR | ODO, UK | 25 |
|
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| Yin et al. [63] | 2012 | Model-based segmentation | OD/OC | DM, RAD | ORIGA | 650 |
|
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| Narasimhan et al. [64] | 2012 | K-means and openCV code | OD/OC | CDR-ISNT ratio | AEH | 50 |
|
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| Cheng et al. [6] | 2013 | Superpixel classification | OD/OC | CDR | ORIGA + SCES | 2326 |
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| Annu and Justin [42] | 2013 | Wavelet energy features | OD/OC | SN – SP – Acc – PPA | N/A | 20 |
|
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| Chandrika and Nirmala [65] | 2013 |
K-means clustering and Gabor wavelet transform |
OD/OC | CDR | N/A | N/A |
|
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| Damon et al. [66] | 2012 | Vessel kinking | OC | Overlap error | SERI | 67 |
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| Ingle and Mishra [55] | 2013 | Gradient method | OC | N/A | N/A | N/A |