python - 使用 Python Image Library 将一张图片切割成多张图片

Question

我需要使用 PIL 将这张图片分成三部分，然后选择中间部分。我该怎么做？

http://thedilbertstore.com/images/periodic_content/dilbert/dt110507dhct.jpg

Answer 1

假设您有一张像这样的很长的图片。

现在你想把它切成更小的垂直位，因为它太长了。

这是一个 Python 脚本，可以执行此操作。这对我为 LaTeX 文档准备非常长的图像很有用。

from __future__ import division
import Image
import math
import os

def long_slice(image_path, out_name, outdir, slice_size):
    """slice an image into parts slice_size tall"""
    img = Image.open(image_path)
    width, height = img.size
    upper = 0
    left = 0
    slices = int(math.ceil(height/slice_size))

    count = 1
    for slice in range(slices):
        #if we are at the end, set the lower bound to be the bottom of the image
        if count == slices:
            lower = height
        else:
            lower = int(count * slice_size)  
        #set the bounding box! The important bit     
        bbox = (left, upper, width, lower)
        working_slice = img.crop(bbox)
        upper += slice_size
        #save the slice
        working_slice.save(os.path.join(outdir, "slice_" + out_name + "_" + str(count)+".png"))
        count +=1

if __name__ == '__main__':
    #slice_size is the max height of the slices in pixels
    long_slice("longcat.jpg","longcat", os.getcwd(), 300)

这是输出

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