image-crop/README.md

# Image Crop Implementation with CV2

*author: David Wang*



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## Desription

An image crop operator implementation with OpenCV.



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## 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" height="150px"/>



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## Factory Constructor

Create the operator via the following factory method

***image_decode.cv2()***



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## 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**: *towhee.types.Image (a sub-class of numpy.ndarray)* 

​	The decoded image data as numpy.ndarray.