Update README

Signed-off-by: shiyu22 <shiyu.chen@zilliz.com>

README.md

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 # Animating using AnimeGanV2
 *author: Filip Haltmayer*
 
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 ## Description
 
 Convert an image into an animated image using [`AnimeganV2`](https://github.com/TachibanaYoshino/AnimeGANv2).
 
 
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 ## Code Example
 Load an image from path './test.png'. 
 
@@ -14,27 +26,36 @@ Load an image from path './test.png'.
 ```python
 import towhee
 
-towhee.glob('/Users/chenshiyu/workspace/data/pic/test.png') \
+towhee.glob('./test.png') \
       .image_decode.cv2() \
       .img2img_translation.animegan(model_name = 'hayao') \
       .show()
 ```
 
-<img src="./results1.png" alt="results1" style="height:40px;"/>
+<img src="./results1.png" height="150px"/>
 
 *Write a same pipeline with explicit inputs/outputs name specifications:*
 
 ```python
 import towhee
 
-towhee.glob['path']('/Users/chenshiyu/workspace/data/pic/test.png') \
+towhee.glob['path']('./test.png') \
       .image_decode.cv2['path', 'origin']() \
-      .img2img_translation.animegan['origin', 'transformed'](model_name = 'hayao') \
-      .select('origin', 'transformed') \
+      .img2img_translation.animegan['origin', 'facepaintv2'](model_name = 'facepaintv2') \
+      .img2img_translation.animegan['origin', 'hayao'](model_name = 'hayao') \
+      .img2img_translation.animegan['origin', 'paprika'](model_name = 'paprika') \
+      .img2img_translation.animegan['origin', 'shinkai'](model_name = 'shinkai') \
+      .select('origin', 'facepaintv2', 'hayao', 'paprika', 'shinkai') \
       .show()
 ```
 
-<img src="./results2.png" alt="results1" style="height:50px;"/>
+<img src="./results2.png" alt="results1" height="150px"/>
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 ## Factory Constructor
 
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 - paprika
 - shinkai
 
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 ## Interface
 
 Takes in a numpy rgb image in channels first. It transforms input into animated image in numpy form.
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-**Returns**: *numpy.ndarray*
+**Returns**: *towhee.types.Image (a sub-class of dumpy.ndarray)*
 
 ​	The new image.
 
 
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 ## Reference
 
 Jie Chen, Gang Liu, Xin Chen