feat: add model script, training configs and trained weights of cait

configs/cait/README.md

@@ -0,0 +1,88 @@
+# Going deeper with Image Transformers
+
+> [Going deeper with Image Transformers](https://arxiv.org/abs/2103.17239)
+
+## Introduction
+
+CaiT is built based on ViT but made two contributions to improve model performance.
+Firstly, Layerscale is introduced to facilitate the convergence.
+Secondly, class-attention offers a more effective processing of the class embedding.
+By combing these parts, Cait could get a SOTA performance on ImageNet-1K dataset.
+
+
+## Results
+
+Our reproduced model performance on ImageNet-1K is reported as follows.
+
+<div align="center">
+
+| Model          | Context  | Top-1 (%) | Top-5 (%) | Params(M) | Recipe                                                                                     | Download                                                                               |
+|----------------| -------- |----------|-----------|-----------|--------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------|
+| cait_xxs24_224 | D910x8-G | 77.71    | 94.10     | 11.94     | [yaml](https://github.com/mindspore-lab/mindcv/blob/main/configs/cait/cait_xxs24_224.yaml) | [weights](https://download.mindspore.cn/toolkits/mindcv/cait/cait_xxs24-31b307a8.ckpt) |
+| cait_xs24_224  | D910x8-G | 81.29    | 95.60     | 26.53     | [yaml](https://github.com/mindspore-lab/mindcv/blob/main/configs/cait/cait_xs24_224.yaml)  | [weights](https://download.mindspore.cn/toolkits/mindcv/cait/cait_xs24-ba0c2053.ckpt)  |
+| cait_s24_224   | D910x8-G | 82.25    | 95.95     | 46.88     | [yaml](https://github.com/mindspore-lab/mindcv/blob/main/configs/cait/cait_s24_224.yaml)   | [weights](https://download.mindspore.cn/toolkits/mindcv/cait/cait_s24-0a06be71.ckpt)   |
+| cait_s36_224   | D910x8-G | 82.11    | 95.84     | 68.16     | [yaml](https://github.com/mindspore-lab/mindcv/blob/main/configs/cait/cait_s36_224.yaml)   | [weights](https://download.mindspore.cn/toolkits/mindcv/cait/cait_s36-2e42bfc8.ckpt)   |
+
+
+</div>
+
+#### Notes
+
+- Context: Training context denoted as {device}x{pieces}-{MS mode}, where mindspore mode can be G - graph mode or F - pynative mode with ms function. For example, D910x8-G is for training on 8 pieces of Ascend 910 NPU using graph mode.
+- Top-1 and Top-5: Accuracy reported on the validation set of ImageNet-1K.
+
+## Quick Start
+
+### Preparation
+
+#### Installation
+
+Please refer to the [installation instruction](https://github.com/mindspore-lab/mindcv#installation) in MindCV.
+
+#### Dataset Preparation
+
+Please download the [ImageNet-1K](https://www.image-net.org/challenges/LSVRC/2012/index.php) dataset for model training and validation.
+
+### Training
+
+* Distributed Training
+
+It is easy to reproduce the reported results with the pre-defined training recipe. For distributed training on multiple Ascend 910 devices, please run
+
+```shell
+# distributed training on multiple GPU/Ascend devices
+mpirun -n 8 python train.py --config configs/cait/cait_xxs24_224.yaml --data_dir /path/to/imagenet
+```
+> If the script is executed by the root user, the `--allow-run-as-root` parameter must be added to `mpirun`.
+
+Similarly, you can train the model on multiple GPU devices with the above `mpirun` command.
+
+For detailed illustration of all hyper-parameters, please refer to [config.py](https://github.com/mindspore-lab/mindcv/blob/main/config.py).
+
+**Note:**  As the global batch size  (batch_size x num_devices) is an important hyper-parameter, it is recommended to keep the global batch size unchanged for reproduction or adjust the learning rate linearly to a new global batch size.
+
+* Standalone Training
+
+If you want to train or finetune the model on a smaller dataset without distributed training, please run:
+
+```shell
+# standalone training on a CPU/GPU/Ascend device
+python train.py --config configs/cait/cait_xxs24_224.yaml --data_dir /path/to/dataset --distribute False
+```
+
+### Validation
+
+To validate the accuracy of the trained model, you can use `validate.py` and parse the checkpoint path with `--ckpt_path`.
+
+```
+python validate.py -c configs/cait/cait_xxs24_224.yaml --data_dir /path/to/imagenet --ckpt_path /path/to/ckpt
+```
+
+### Deployment
+
+Please refer to the [deployment tutorial](https://mindspore-lab.github.io/mindcv/tutorials/deployment/).
+
+## References
+
+<!--- Guideline: Citation format should follow GB/T 7714. -->
+[1] Touvron H, Cord M, Sablayrolles A, et al. Going deeper with image transformers[C]//Proceedings of the IEEE/CVF international conference on computer vision. 2021: 32-42.

configs/cait/cait_s24_224.yaml

@@ -0,0 +1,61 @@
+# system config
+mode: 0
+distribute: True
+num_parallel_workers: 8
+val_while_train: True
+
+# dataset config
+dataset: 'imagenet'
+data_dir: '/path/to/imagenet'
+shuffle: True
+dataset_download: False
+batch_size: 64
+drop_remainder: True
+
+# augmentation config
+image_resize: 224
+scale: [0.08, 1.0]
+ratio: [0.75, 1.333]
+hflip: 0.5
+vflip: 0.
+interpolation: 'bicubic'
+auto_augment: 'randaug-m9-mstd0.5-inc1'
+re_prob: 0.25
+mixup: 0.8
+cutmix: 1
+color_jitter: 0.3
+crop_pct: 1.0
+ema: True
+ema_decay: 0.99996
+
+# model config
+model: 'cait_s24_224'
+num_classes: 1000
+pretrained: False
+ckpt_path: ''
+keep_checkpoint_max: 10
+ckpt_save_dir: '/cache/output/'
+epoch_size: 400
+dataset_sink_mode: True
+amp_level: 'O2'
+drop_path_rate: 0.1
+
+# loss config
+loss: 'CE'
+label_smoothing: 0.1
+
+# lr scheduler config
+scheduler: 'warmup_cosine_decay'
+lr: 0.001
+min_lr: 0.000001
+warmup_epochs: 30
+decay_epochs: 370
+num_cycles: 2
+
+
+# optimizer config
+opt: 'adamw'
+weight_decay: 0.05
+filter_bias_and_bn: True
+loss_scale: 1024
+use_nesterov: False

configs/cait/cait_s36_224.yaml

@@ -0,0 +1,61 @@
+# system config
+mode: 0
+distribute: True
+num_parallel_workers: 8
+val_while_train: True
+
+# dataset config
+dataset: 'imagenet'
+data_dir: '/path/to/iamgenet'
+shuffle: True
+dataset_download: False
+batch_size: 64
+drop_remainder: True
+
+# augmentation config
+image_resize: 224
+scale: [0.08, 1.0]
+ratio: [0.75, 1.333]
+hflip: 0.5
+vflip: 0.
+interpolation: 'bicubic'
+auto_augment: 'randaug-m9-mstd0.5-inc1'
+re_prob: 0.25
+mixup: 0.8
+cutmix: 1
+color_jitter: 0.3
+crop_pct: 1.0
+ema: True
+ema_decay: 0.99996
+
+# model config
+model: 'cait_s36_224'
+num_classes: 1000
+pretrained: False
+ckpt_path: ''
+keep_checkpoint_max: 10
+ckpt_save_dir: './ckpt'
+epoch_size: 400
+dataset_sink_mode: True
+amp_level: 'O2'
+drop_path_rate: 0.1
+
+# loss config
+loss: 'CE'
+label_smoothing: 0.1
+
+# lr scheduler config
+scheduler: 'warmup_cosine_decay'
+lr: 0.002
+min_lr: 0.000001
+warmup_epochs: 30
+decay_epochs: 370
+num_cycles: 2
+
+
+# optimizer config
+opt: 'adamw'
+weight_decay: 0.05
+filter_bias_and_bn: True
+loss_scale: 1024
+use_nesterov: False

configs/cait/cait_xs24_224.yaml

@@ -0,0 +1,61 @@
+# system config
+mode: 0
+distribute: True
+num_parallel_workers: 8
+val_while_train: True
+
+# dataset config
+dataset: 'imagenet'
+data_dir: '/path/to/imagenet'
+shuffle: True
+dataset_download: False
+batch_size: 64
+drop_remainder: True
+
+# augmentation config
+image_resize: 224
+scale: [0.08, 1.0]
+ratio: [0.75, 1.333]
+hflip: 0.5
+vflip: 0.
+interpolation: 'bicubic'
+auto_augment: 'randaug-m9-mstd0.5-inc1'
+re_prob: 0.25
+mixup: 0.8
+cutmix: 1
+color_jitter: 0.3
+crop_pct: 1.0
+ema: True
+ema_decay: 0.99996
+
+# model config
+model: 'cait_xs24_224'
+num_classes: 1000 #
+pretrained: False #
+ckpt_path: ''
+keep_checkpoint_max: 10
+ckpt_save_dir: './ckpt'
+epoch_size: 400
+dataset_sink_mode: True
+amp_level: 'O2'
+drop_path_rate: 0.1
+
+# loss config
+loss: 'CE'
+label_smoothing: 0.1
+
+# lr scheduler config
+scheduler: 'warmup_cosine_decay'
+lr: 0.001
+min_lr: 0.000001
+warmup_epochs: 40
+decay_epochs: 360
+num_cycles: 2
+
+
+# optimizer config
+opt: 'adamw'
+weight_decay: 0.05
+filter_bias_and_bn: True
+loss_scale: 1024
+use_nesterov: False

configs/cait/cait_xxs24_224.yaml

@@ -0,0 +1,61 @@
+# system config
+mode: 0
+distribute: True
+num_parallel_workers: 8
+val_while_train: True
+
+# dataset config
+dataset: 'imagenet'
+data_dir: '/path/to/dataset'
+shuffle: True
+dataset_download: False
+batch_size: 128
+drop_remainder: True
+
+# augmentation config
+image_resize: 224
+scale: [0.08, 1.0]
+ratio: [0.75, 1.333]
+hflip: 0.5
+vflip: 0.
+interpolation: 'bicubic'
+auto_augment: 'randaug-m9-mstd0.5-inc1'
+re_prob: 0.25
+mixup: 0.8
+cutmix: 1
+color_jitter: 0.3
+crop_pct: 1.0
+ema: True
+ema_decay: 0.99996
+
+# model config
+model: 'cait_xxs24_224'
+num_classes: 1000
+pretrained: False
+ckpt_path: ''
+keep_checkpoint_max: 10
+ckpt_save_dir: './ckpt'
+epoch_size: 500
+dataset_sink_mode: True
+amp_level: 'O2'
+drop_path_rate: 0.1
+
+# loss config
+loss: 'CE'
+label_smoothing: 0.1
+
+# lr scheduler config
+scheduler: 'warmup_cosine_decay'
+lr: 0.001
+min_lr: 0.000001
+warmup_epochs: 40
+decay_epochs: 460
+num_cycles: 2
+
+
+# optimizer config
+opt: 'adamw'
+weight_decay: 0.025
+filter_bias_and_bn: True
+loss_scale: 1024
+use_nesterov: False