# Image Embedding with Timm
*author: [Jael Gu](https://github.com/jaelgu), Filip*
## Description
An image embedding operator generates a vector given an image.
This operator extracts features for image with pre-trained models provided by [Timm](https://github.com/rwightman/pytorch-image-models).
Timm is a deep-learning library developed by [Ross Wightman](https://twitter.com/wightmanr),
who maintains SOTA deep-learning models and tools in computer vision.
## Code Example
Load an image from path './towhee.jpeg'
and use the pre-trained ResNet50 model ('resnet50') to generate an image embedding.
*Write the pipeline in simplified style:*
```python
import towhee
towhee.glob('./towhee.jpeg') \
.image_decode() \
.image_embedding.timm(model_name='resnet50') \
.show()
```
*Write a same pipeline with explicit inputs/outputs name specifications:*
```python
import towhee
towhee.glob['path']('./towhee.jpeg') \
.image_decode['path', 'img']() \
.image_embedding.timm['img', 'vec'](model_name='resnet50') \
.select['img', 'vec']() \
.show()
```
## Factory Constructor
Create the operator via the following factory method:
***image_embedding.timm(model_name='resnet34', num_classes=1000, skip_preprocess=False)***
**Parameters:**
***model_name:*** *str*
The model name in string. The default value is "resnet34".
Refer to [Timm Docs](https://fastai.github.io/timmdocs/#List-Models-with-Pretrained-Weights) to get a full list of supported models.
***num_classes:*** *int*
The number of classes. The default value is 1000.
It is related to model and dataset.
***skip_preprocess:*** *bool*
The flag to control whether to skip image pre-process.
The default value is False.
If set to True, it will skip image preprocessing steps (transforms).
In this case, input image data must be prepared in advance in order to properly fit the model.
## Interface
An image embedding operator takes a towhee image as input.
It uses the pre-trained model specified by model name to generate an image embedding in ndarray.
**Parameters:**
***data:*** *towhee.types.Image*
The decoded image data in towhee Image (a subset of numpy.ndarray).
**Returns:** *numpy.ndarray*
An image embedding generated by model, in shape of (feature_dim,).
## Towhee Serve
Models which is supported the towhee.serve.
**Model List**
models | models | models
--------- | ---------- | ------------
adv_inception_v3 | bat_resnext26ts | beit_base_patch16_224
beit_base_patch16_224_in22k | beit_base_patch16_384 | beit_large_patch16_224
beit_large_patch16_224_in22k | beit_large_patch16_384 | beit_large_patch16_512
botnet26t_256 | cait_m36_384 | cait_m48_448
cait_s24_224 | cait_s24_384 | cait_s36_384
cait_xs24_384 | cait_xxs24_224 | cait_xxs24_384
cait_xxs36_224 | cait_xxs36_384 | coat_lite_mini
coat_lite_small | coat_lite_tiny | convit_base
convit_small | convit_tiny | convmixer_768_32
convmixer_1024_20_ks9_p14 | convmixer_1536_20 | convnext_base
convnext_base_384_in22ft1k | convnext_base_in22ft1k | convnext_base_in22k
convnext_large | convnext_large_384_in22ft1k | convnext_large_in22ft1k
convnext_large_in22k | convnext_small | convnext_small_384_in22ft1k
convnext_small_in22ft1k | convnext_small_in22k | convnext_tiny
convnext_tiny_384_in22ft1k | convnext_tiny_hnf | convnext_tiny_in22ft1k
convnext_tiny_in22k | convnext_xlarge_384_in22ft1k | convnext_xlarge_in22ft1k
convnext_xlarge_in22k | cs3darknet_focus_l | cs3darknet_focus_m
cs3darknet_l | cs3darknet_m | cspdarknet53
cspresnet50 | cspresnext50 | darknet53
deit3_base_patch16_224 | deit3_base_patch16_224_in21ft1k | deit3_base_patch16_384
deit3_base_patch16_384_in21ft1k | deit3_huge_patch14_224 | deit3_huge_patch14_224_in21ft1k
deit3_large_patch16_224 | deit3_large_patch16_224_in21ft1k | deit3_large_patch16_384
deit3_large_patch16_384_in21ft1k | deit3_small_patch16_224 | deit3_small_patch16_224_in21ft1k
deit3_small_patch16_384 | deit3_small_patch16_384_in21ft1k | deit_base_distilled_patch16_224
deit_base_distilled_patch16_384 | deit_base_patch16_224 | deit_base_patch16_384
deit_small_distilled_patch16_224 | deit_small_patch16_224 | deit_tiny_distilled_patch16_224
deit_tiny_patch16_224 | densenet121 | densenet161
densenet169 | densenet201 | densenetblur121d
dla34 | dla46_c | dla46x_c
dla60 | dla60_res2net | dla60_res2next
dla60x | dla60x_c | dla102
dla102x | dla102x2 | dla169
dm_nfnet_f0 | dm_nfnet_f1 | dm_nfnet_f2
dm_nfnet_f3 | dm_nfnet_f4 | dm_nfnet_f5
dm_nfnet_f6 | dpn68 | dpn68b
dpn92 | dpn98 | dpn107
dpn131 | eca_botnext26ts_256 | eca_halonext26ts
eca_nfnet_l0 | eca_nfnet_l1 | eca_nfnet_l2
eca_resnet33ts | eca_resnext26ts | ecaresnet26t
ecaresnet50t | ecaresnet269d | edgenext_small
edgenext_small_rw | edgenext_x_small | edgenext_xx_small
efficientnet_b0 | efficientnet_b1 | efficientnet_b2
efficientnet_b3 | efficientnet_b4 | efficientnet_el
efficientnet_el_pruned | efficientnet_em | efficientnet_es
efficientnet_es_pruned | efficientnet_lite0 | efficientnetv2_rw_m
efficientnetv2_rw_s | efficientnetv2_rw_t | ens_adv_inception_resnet_v2
ese_vovnet19b_dw | ese_vovnet39b | fbnetc_100
fbnetv3_b | fbnetv3_d | fbnetv3_g
gc_efficientnetv2_rw_t | gcresnet33ts | gcresnet50t
gcresnext26ts | gcresnext50ts | gernet_l
gernet_m | gernet_s | ghostnet_100
gluon_inception_v3 | gluon_resnet18_v1b | gluon_resnet34_v1b
gluon_resnet50_v1b | gluon_resnet50_v1c | gluon_resnet50_v1d
gluon_resnet50_v1s | gluon_resnet101_v1b | gluon_resnet101_v1c
gluon_resnet101_v1d | gluon_resnet101_v1s | gluon_resnet152_v1b
gluon_resnet152_v1c | gluon_resnet152_v1d | gluon_resnet152_v1s
gluon_resnext50_32x4d | gluon_resnext101_32x4d | gluon_resnext101_64x4d
gluon_senet154 | gluon_seresnext50_32x4d | gluon_seresnext101_32x4d
gluon_seresnext101_64x4d | gluon_xception65 | gmlp_s16_224
halo2botnet50ts_25
halo2botnet50ts_256 | halonet26t | halonet50ts
haloregnetz_b | hardcorenas_a | hardcorenas_b
hardcorenas_c | hardcorenas_d | hardcorenas_e
hrnet_w18 | hrnet_w18_small | hrnet_w18_small_v2
hrnet_w30 | hrnet_w32 | hrnet_w40
hrnet_w44 | hrnet_w48 | hrnet_w64
ig_resnext101_32x8d | ig_resnext101_32x16d | ig_resnext101_32x32d
ig_resnext101_32x48d | inception_resnet_v2 | inception_v3
inception_v4 | jx_nest_base | jx_nest_small
jx_nest_tiny | lambda_resnet26rpt_256 | lambda_resnet26t
lambda_resnet50ts | lamhalobotnet50ts_256 | lcnet_050
lcnet_075 | lcnet_100 | legacy_seresnet18
legacy_seresnet34 | legacy_seresnet50 | legacy_seresnet101
legacy_seresnet152 | legacy_seresnext26_32x4d | levit_128
levit_128s | levit_192 | levit_256
levit_384 | mixer_b16_224 | mixer_b16_224_in21k
mixer_b16_224_miil | mixer_b16_224_miil_in21k | mixer_l16_224
mixer_l16_224_in21k | mixnet_l | mixnet_m
mixnet_s | mixnet_xl | mnasnet_100
mnasnet_small | mobilenetv2_050 | mobilenetv2_100
mobilenetv2_110d | mobilenetv2_120d | mobilenetv2_140
mobilenetv3_large_100 | mobilenetv3_large_100_miil | mobilenetv3_large_100_miil_in21k
mobilenetv3_rw | mobilenetv3_small_050 | mobilenetv3_small_075
mobilenetv3_small_100 | mobilevit_s | mobilevit_xs
mobilevit_xxs | mobilevitv2_050 | mobilevitv2_075
mobilevitv2_100 | mobilevitv2_125 | mobilevitv2_150
mobilevitv2_150_384_in22ft1k | mobilevitv2_150_in22ft1k | mobilevitv2_175
mobilevitv2_175_384_in22ft1k | mobilevitv2_175_in22ft1k | mobilevitv2_200
mobilevitv2_200_384_in22ft1k | mobilevitv2_200_in22ft1k | nf_regnet_b1
nf_resnet50 | nfnet_l0 | pit_b_224
pit_b_distilled_224 | pit_s_224 | pit_s_distilled_224
pit_ti_224 | pit_ti_distilled_224 | pit_xs_224