python 把指定的一张图片 改为 jpg dpi 300

使用了Python的Pillow库

from PIL import Image
Image.MAX_IMAGE_PIXELS = 2000000000    #设置最大处理像素极限

def convert_image_to_jpg(input_path, output_path, dpi=300):
    with Image.open(input_path) as img:
        # 设置DPI
        img.info['dpi'] = (dpi, dpi)
        # 保存为JPG格式，并设置优化参数
        img.convert('RGB').save(output_path, 'JPEG', quality=95, dpi=(dpi, dpi), optimize=True)

# 使用函数转换图片
convert_image_to_jpg('/www/busservlib/diyhuoniu_-1_164036446657ea6461800_tplfilter_1-0_merge_x_1_.png', '164036446657ea6461800_tplfilter_1-0_merge.jpg')

开始没有设置像素处理极限，有警告错误

/usr/local/python3/lib/python3.8/site-packages/PIL/Image.py:3011: DecompressionBombWarning: Image size (114276962 pixels) exceeds limit of 89478485 pixels, could be decompression bomb DOS attack.
  warnings.warn(
^CTraceback (most recent call last):
  File "/www/web/py/jpgdpi.py", line 12, in <module>
    convert_image_to_jpg('/www/busservlib/diyhuoniu_-1_164036446657ea6461800_tplfilter_1-0_merge_x_1_.png', '164036446657ea6461800_tplfilter_1-0_merge.jpg')
  File "/www/web/py/jpgdpi.py", line 9, in convert_image_to_jpg
    img.convert('RGB').save(output_path, 'JPEG', quality=95, dpi=(dpi, dpi), optimize=True)
  File "/usr/local/python3/lib/python3.8/site-packages/PIL/Image.py", line 934, in convert
    self.load()
  File "/usr/local/python3/lib/python3.8/site-packages/PIL/ImageFile.py", line 257, in load
    n, err_code = decoder.decode(b)
KeyboardInterrupt

设置为20亿像素进行处理，可以成功，设置为none表示不限制，但不建议这种无设置极限的逻辑。