Table 4.
Color channel used in non-neural network (Non-NN) based previous works for segmenting retinal landmarks. OD: Optic Disc, CRBVs: Central Retinal Blood Vessels, Gr: Grayscale weighted summation of Red, Green and Blue, R: Red, G: Green, B: Blue.
| Year | OD | Macula/Fovea | CRBVs | |||
|---|---|---|---|---|---|---|
| Reference | Color | Reference | Color | Reference | Color | |
| 1989 | Chaudhuri [99] | G | ||||
| 1999 | Sinthanayothin [100] | RGB | ||||
| 2000 | Hoover [10] | RGB | ||||
| 2004 | Lowell [101] | Gr | Li [102] | RGB | ||
| 2006 | Soares [103] | G | ||||
| 2007 | Xu [104] | RGB | Niemeijer [105] | G | Ricci [106] | G |
| Abramoff [107] | R, G, B | Tobin [108] | G | |||
| 2008 | Youssif [109] | RGB | ||||
| 2009 | Niemeijer [110] | G | Cinsdikici [111] | G | ||
| 2010 | Welfer [112] | G | ||||
| Aquino [113] | R, G | |||||
| Zhu [114] | RGB | |||||
| 2011 | Lu [115] | R, G | Welfer [116] | G | Cheung [117] | RGB |
| Kose [118] | RGB | |||||
| You [119] | G | |||||
| 2012 | Bankhead [120] | G | ||||
| Qureshi [121] | G | Fraz [4] | G | |||
| Fraz [122] | G | |||||
| Li [123] | RGB | |||||
| Lin [124] | G | |||||
| Moghimirad [125] | G | |||||
| 2013 | Morales [126] | Gr | Chin [127] | RGB | Akram [128] | G |
| Gegundez [129] | G | Badsha [130] | Gr | |||
| Budai [6] | G | |||||
| Fathi [131] | G | |||||
| Fraz [132] | G | |||||
| Nayebifar [133] | G, B | |||||
| Nguyen [134] | G | |||||
| Wang [135] | G | |||||
| 2014 | Giachetti [136] | G, Gr | Kao [137] | G | Bekkers [138] | G |
| Aquino [139] | R, G | Cheng [140] | G | |||
| 2015 | Miri [141] | R, G, B | Dai [142] | G | ||
| Mary [143] | R | Hassanien [144] | G | |||
| Harangi [145] | RGB, G | Imani [146] | G | |||
| Lazar [147] | G | |||||
| Roychowdhury [148] | G | |||||
| 2016 | Mittapalli [149] | RGB | Medhi [150] | R | Aslani [151] | G |
| Roychowdhury [152] | G | Onal [153] | Gr | Bahadarkhan [154] | G | |
| Sarathi [155] | R, G | Christodoulidis [156] | G | |||
| Orlando [157] | G | |||||
| 2018 | Ramani [158] | G | Khan [159] | G | ||
| Chalakkal [160] | RGB | Xia [161] | G | |||
| 2019 | Thakur [162] | Gr | Khawaja [163] | G | ||
| Naqvi [164] | R, G | Wang [165] | RGB | |||
| 2020 | Dharmawan [166] | R, G, B | Carmona [167] | G | Saroj [168] | Gr |
| Guo [169] | G | Zhang [170] | G | |||
| Zhou [171] | G | |||||
| 2021 | Kim [172] | G | ||||