19 lines
763 B
Python
19 lines
763 B
Python
import math
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from PIL import Image
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def rotate_image_with_padding(img:Image):
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# 创建一个空画布，
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canvas_size = (img.width * 3, img.height)
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canvas = Image.new('RGB', canvas_size, color='white')
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# 将原图片复制为三张，横着放着一行，居中放置在画布上
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for i in range(3):
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canvas.paste(img, (img.width * i + (canvas.width - img.width * 3) // 2, (canvas.height - img.height) // 2))
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# 将图片旋转45度，空白的地方用白色填上
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canvas = canvas.rotate(315, expand=True, fillcolor='white')
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point_x = (5*math.sqrt(2)-2)*img.width/4
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point_y = (3*math.sqrt(2)-2)*img.width/4
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croped_img = canvas.crop((point_x, point_y, point_x+img.width, point_y+img.height))
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return croped_img
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