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Table 2 Major deep learning model architecture families and characteristics. Note that there may be multiple variants (usually with different number of layers/parameters) within each architecture family

From: Different fundus imaging modalities and technical factors in AI screening for diabetic retinopathy: a review

Architecture family

Original year

Parameters

Layers

Module organization

Example application(s)

AlexNet

2012

~ 60 million

8

Convolutional, Max Pooling

Abràmoff et al. [34],

Quellec et al. [66]

VGGNet

2014

~ 180 million

19

Convolutional, Max Pooling

Abràmoff et al. [34], Quellec et al. [66], Ting et al. [26], Gargeya et al. [47], Bellemo et al. [52]

GoogLeNet (also Inception v1)

2015

~ 7 million

22

Inception, Pool+Concat

Takahashi et al. [63]

Inception (v3)

2015

~ 24 million

42

Inception, Pool+Concat

Gulshan et al. [35], Krause et al. [30]

ResNet

2016

~ 60 million

152

Convolutional, Skip Connections

Bellemo et al. [52]

Inception-ResNet (v2)

2016

~ 56 million

164

Residual Inception

 –

SqueezeNet

2016

~ 1.2 million(before pruning)

14

1 × 1 Convolutional, Squeeze & Expand Layers

 –

ResNeXt

2017

~ 25 million

50

Convolutional (Grouped)

 –

DenseNet

2017

~ 20 million

201

Dense, Transition

 –