cv2/README.md

# Image Decode Implementation with CV2

*author: Kaiyuan Hu, Rentong Guo*



<br />



## Desription

An image decode operator implementation with OpenCV.



<br />



## Code Example

Load a image from path './dog.jpg'. 

 *Write the pipeline in simplified style*:

```python
import towhee

towhee.glob('./dog.jpg') \
  .image_decode.cv2() \
  .show()
```

*Write a same pipeline with explicit inputs/outputs name specifications:*

```python
import towhee

towhee.glob['path']('./dog.jpg') \
  .image_decode.cv2['path', 'img']() \
  .select('img') \
  .show()
```

<img src="./show_result.jpg" align='left' style="height: 150px; "/>



<br />



## Factory Constructor

Create the operator via the following factory method

***image_decode.cv2()***



<br />



## Interface

An image decode operator takes an image path as input. It decodes the image back to ndarray.



**Parameters:**

​	***img***: *str*

​	Image file path.



**Returns**: *numpy.ndarray*

​	The decoded image data.