这段代码在做什么?请帮忙,我是python的新手,有人可以向我解释gray [:,0]在做什么?我不理解这部分“ [:,0]”
while np.sum(gray[0]) == 0:
gray = gray[1:]
while np.sum(gray[:,0]) == 0:
gray = np.delete(gray,1)
while np.sum(gray[-1]) == 0:
gray = gray[:-1]
while np.sum(gray[:,-1]) == 0:
gray = np.delete(gray,-1,1)
rows,cols = gray.shape