Add better resnext50_32x4d weights trained by andravin

Author: rwightman

README.md

@@ -4,6 +4,7 @@
 
 ### March 18, 2020
 * Add EfficientNet-Lite models w/ weights ported from [Tensorflow TPU](https://github.com/tensorflow/tpu/tree/master/models/official/efficientnet/lite)
+* Add RandAugment trained ResNeXt-50 32x4d weights with 79.8 top-1. Trained by [Andrew Lavin](https://github.com/andravin) (see Training section for hparams)
 
 ### Feb 29, 2020
 * New MobileNet-V3 Large weights trained from stratch with this code to 75.77% top-1
@@ -183,11 +184,11 @@ I've leveraged the training scripts in this repository to train a few of the mod
 | mixnet_xl | 80.478 (19.522) | 94.932 (5.068) | 11.90M | bicubic | 224 |
 | efficientnet_b2 | 80.402 (19.598) | 95.076 (4.924) | 9.11M | bicubic | 260 |
 | skresnext50d_32x4d | 80.156 (19.844) | 94.642 (5.358) | 27.5M | bicubic | 224 |
+| resnext50_32x4d | 79.762 (20.238) | 94.600 (5.400) | 25M | bicubic | 224 |
 | resnext50d_32x4d | 79.674 (20.326) | 94.868 (5.132) | 25.1M | bicubic | 224 |
 | resnet50 | 79.038 (20.962) | 94.390 (5.610) | 25.6M | bicubic | 224 |
 | mixnet_l | 78.976 (21.024 | 94.184 (5.816) | 7.33M | bicubic | 224 |
 | efficientnet_b1 | 78.692 (21.308) | 94.086 (5.914) | 7.79M | bicubic | 240 |
-| resnext50_32x4d | 78.512 (21.488) | 94.042 (5.958) | 25M | bicubic | 224 |
 | efficientnet_es | 78.066 (21.934) | 93.926 (6.074) | 5.44M | bicubic | 224 |
 | seresnext26t_32x4d | 77.998 (22.002) | 93.708 (6.292) | 16.8M | bicubic | 224 |
 | seresnext26tn_32x4d | 77.986 (22.014) | 93.746 (6.254) | 16.8M | bicubic | 224 |
@@ -388,6 +389,12 @@ Trained by [Andrew Lavin](https://github.com/andravin) with 8 V100 cards. Model
 `./distributed_train.sh 2 /imagenet/ --model mobilenetv3_large_100 -b 512 --sched step --epochs 600 --decay-epochs 2.4 --decay-rate .973 --opt rmsproptf --opt-eps .001 -j 7 --warmup-lr 1e-6 --weight-decay 1e-5 --drop 0.2 --drop-connect 0.2 --model-ema --model-ema-decay 0.9999 --aa rand-m9-mstd0.5 --remode pixel --reprob 0.2 --amp --lr .064 --lr-noise 0.42 0.9`
 
 
+### ResNeXt-50 32x4d w/ RandAugment - 79.762 top-1, 94.60 top-5
+These params will also work well for SE-ResNeXt-50 and SK-ResNeXt-50 and likely 101. I used them for the SK-ResNeXt-50 32x4d that I trained with 2 GPU using a slightly higher LR per effective batch size (lr=0.18, b=192 per GPU). The cmd line below are tuned for 8 GPU training.
+
+
+`./distributed_train.sh 8 /imagenet --model resnext50_32x4d --lr 0.6 --warmup-epochs 5 --epochs 240 --weight-decay 1e-4 --sched cosine --reprob 0.4 --recount 3 --remode pixel --aa rand-m7-mstd0.5-inc1 -b 192 -j 6 --amp --dist-bn reduce`
+
 **TODO dig up some more**
 
 

timm/models/resnet.py

@@ -53,7 +53,7 @@ def _cfg(url='', **kwargs):
     'wide_resnet50_2': _cfg(url='https://download.pytorch.org/models/wide_resnet50_2-95faca4d.pth'),
     'wide_resnet101_2': _cfg(url='https://download.pytorch.org/models/wide_resnet101_2-32ee1156.pth'),
     'resnext50_32x4d': _cfg(
-        url='https://github.com/rwightman/pytorch-image-models/releases/download/v0.1-weights/resnext50_32x4d-068914d1.pth',
+        url='https://github.com/rwightman/pytorch-image-models/releases/download/v0.1-weights/resnext50_32x4d_ra-d733960d.pth',
         interpolation='bicubic'),
     'resnext50d_32x4d': _cfg(
         url='https://github.com/rwightman/pytorch-image-models/releases/download/v0.1-weights/resnext50d_32x4d-103e99f8.pth',