diff --git a/README.md b/README.md
index c73f07c..5cf6c9a 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
-# Image Decode Implementation with NVJpeg and CV2
+# Image Decode Implementation with CV2 and nvjpeg
 
-*author: Junjie Jiang*
+*author: junjie.jiang*
 
 
 
@@ -10,10 +10,10 @@
 
 ## Description
 
-An image decode operator implementation with OpenCV and NvJpeg.
-The decoder will use GPU to decode jpeg images.
+An image decode operator implementation with OpenCV and nvjpeg.
+In CPU env, use OpenCV, in GPU env, use nvjpeg to decode jpeg files.
+
 
-Only supports linux.
 
 <br />
 
@@ -21,32 +21,24 @@ Only supports linux.
 
 ## Code Example
 
-Load a image from path './dog.jpg'. 
+Load a image from path './src_dog.jpg'. 
 
  *Write the pipeline in simplified style:*
 
 ```python
-import towhee
-
-towhee.glob('./dog.jpg') \
-  .image_decode.nvjpeg() \
-  .show()
-```
+from towhee.dc2 import pipe, ops, DataCollection
 
-*Write a same pipeline with explicit inputs/outputs name specifications:*
 
-```python
-import towhee
+p = (
+  pipe.input('url')
+  .map('url', 'image', ops.image_decode.nvjpeg())
+  .output('image')
+)
 
-towhee.glob['path']('./dog.jpg') \
-  .image_decode.nvjpeg['path', 'img']() \
-  .select['img']() \
-  .show()
+DataCollection(p('./src_dog.jpg')).show()
 ```
 
-
-
-<img src="./show_result.jpg" height="150px"/>
+<img src="./dog.jpg" height="150px"/>
 
 
 
@@ -58,7 +50,7 @@ towhee.glob['path']('./dog.jpg') \
 
 Create the operator via the following factory method:
 
-***image_decode.nvjpeg()***
+***ops.image_decode.nvjpeg()***
 
 
 
@@ -76,7 +68,7 @@ An image decode operator takes an image path as input. It decodes the image back
 
 **img**: *str*
 
-​	Image file path.
+​	Local file path or http url.
 
 
 
diff --git a/dog.jpg b/dog.jpg
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diff --git a/src_dog.jpg b/src_dog.jpg
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