1import cv2
 2import numpy as np
 3
 4def main(inputs, outputs, parameters, synchronise):
 5    '''
 6    ## Crops an Image\n
 7    The image which is to be cropped is read through the inputs using the `inputs.read_image()` function.
 8    The parameters ask for **x**, **y**, **w**, **h**\n
 9    ```
10    x: x co-ordinate of where the crop should start\n
11    y: y co-ordinate of where the crop should start\n
12    w: width of the crop\n
13    h: height of the crop\n
14    ```
15    Image is cropped by simple list slicing.\n
16    `while` loop is the part of the program that is executed continuously.
17    It is enabled by default but can be disabled by passing in 0 through the enable wire.
18    Output is shared via `share_image()`
19
20    **Inputs**: BGR Image
21
22    **Outputs**: Resized BGR Image
23
24    **Parameters**: x, y, width, height
25    '''
26    x, y, w, h = np.array([int(x.strip()) for x in parameters.read_string("xywh").split(",")])
27    
28    auto_enable = False
29    try:
30        enable = inputs.read_number("Enable")
31    except Exception:
32        auto_enable = True
33
34    while(auto_enable or inputs.read_number('Enable')):
35        frame = inputs.read_image("Img")
36        if frame is None:
37            continue
38
39        
40        cropped_img = frame[y:y+h, x:x+w, :]
41        outputs.share_image('Out', cropped_img)
42
43        synchronise()