In the below function imcrop_tosquare.
Assume i have a image of shape (8,4)
ie 8 rows and 4 column.
If that is the case. I will be getting extra as 4.
Then extra%2 ==0 condition gets satisfied.
crop = img[2:-2,:]
What does 2 to -2 represent? I assume it is from 2nd row to its before row. 1,2,3,4,5,6,7,8 [This will be in loop] so -1 would be 1 and -2 would be 2. Wont the image be damaged if bring the first two rows to end?? Am i interpreting it wrongly? Can anyone guide me in understanding this.
def imcrop_tosquare(img):
"""Make any image a square image.
Parameters
----------
img : np.ndarray
Input image to crop, assumed at least 2d.
Returns
-------
crop : np.ndarray
Cropped image.
"""
if img.shape[0] > img.shape[1]:
extra = (img.shape[0] - img.shape[1])
if extra % 2 == 0:
crop = img[extra // 2:-extra // 2, :]
else:
crop = img[max(0, extra // 2 + 1):min(-1, -(extra // 2)), :]
elif img.shape[1] > img.shape[0]:
extra = (img.shape[1] - img.shape[0])
if extra % 2 == 0:
crop = img[:, extra // 2:-extra // 2]
else:
crop = img[:, max(0, extra // 2 + 1):min(-1, -(extra // 2))]
else:
print("It is imgae")
crop = img
return crop
