如何裁剪 1000x1000 图片的边角

Question

我正在尝试将图片裁剪为 1000 x 1000 像素。它适用于裁剪图片的最左侧。

img = Image.open('image.jpg')
(width, height) = img.size
if width >= height:
    multiplier = 1000 / height
    height = int(height * multiplier + 1)
    width = int(width * multiplier + 1)
    img = img.resize((width, height))
    cropped_img = img.crop((0,0, 1000,1000))
    cropped_img.save("background_image.png")
if height >= width:
    multiplier = 1000 / width
    width = int(width * multiplier + 1)
    height = int(height * multiplier + 1)
    img = img.resize((height, width))
    cropped_img = img.crop((0,0, 1000,1000))
    cropped_img.save("background_image.png")

但是，如果我尝试将裁剪更改为最右侧，它 returns 会出错：

系统错误：图块无法扩展到图像外

img = Image.open('image.jpg')
(width, height) = img.size
if width >= height:
    multiplier = 1000 / height
    height = int(height * multiplier + 1)
    width = int(width * multiplier + 1)
    img = img.resize((width, height))
    cropped_img = img.crop((1000,1000, 0, 0))
    cropped_img.save("background_image.png")
if height >= width:
    multiplier = 1000 / width
    width = int(width * multiplier + 1)
    height = int(height * multiplier + 1)
    img = img.resize((height, width))
    cropped_img = img.crop((1000,1000, 0, 0))
    cropped_img.save("background_image.png")

Answer 1

正如评论和 documentation 指出的那样，参数应以 (left, upper, right, lower).

的形式提供

在您的情况下，这转换为 (width - 1000, height - 1000, width, height)

如何裁剪 1000x1000 图片的边角

How to crop corners of a 1000x1000 picture

python

python-imaging-library