update the readme.

Signed-off-by: wxywb <xy.wang@zilliz.com>

README.md

@@ -17,7 +17,7 @@ This operator extracts features for image or text with [CLIP](https://arxiv.org/
 
 ## Code Example
 
-Load an image from path './dog.jpg' to generate an image embedding. 
+Load an image from path './teddy.jpg' to generate an image embedding. 
 Read the text 'a dog' to generate an text embedding. 
  *Write the pipeline in simplified style*:
 
@@ -34,7 +34,8 @@ towhee.dc(["a dog"]) \
       .towhee.clip(name='ViT-B/32', modality='text') \
       .show()
 ```
-<img src="https://towhee.io/image-embedding/dolg/raw/branch/main/result1.png" alt="result1" style="height:20px;"/>
+<img src="https://towhee.io/towhee/clip/raw/branch/main/vec1.png" alt="result1" style="height:20px;"/>
+<img src="https://towhee.io/towhee/clip/raw/branch/main/vec2.png" alt="result2" style="height:20px;"/>
 
 *Write a same pipeline with explicit inputs/outputs name specifications:*
 
@@ -53,7 +54,7 @@ towhee.dc(["a dog"]) \
       .select['data', 'vec']() \
       .show()
 ```
-<img src="https://towhee.io/image-embedding/dolg/raw/branch/main/result2.png" alt="result2" style="height:60px;"/>
+<img src="https://towhee.io/towhee/clip/raw/branch/main/tabular1.png" alt="result1" style="height:60px;"/>
 
 
 <br />
@@ -82,8 +83,7 @@ Create the operator via the following factory method
 
 ## Interface
 
-An image embedding operator takes a [towhee image](link/to/towhee/image/api/doc) as input.
-It uses the pre-trained model specified by model name to generate an image embedding in ndarray.
+An image-text embedding operator takes a [towhee image](link/to/towhee/image/api/doc) or string as input and generate an image embedding in ndarray.
 
 
 **Parameters:**