Can't open a tiff with old-style jpeg compressed file

[xiaoyzhou]

What did you do?

I can get the infomation from tiffinfo.

$ tiffinfo 20230822143148.tif 
TIFF Directory at offset 0x8 (8)
  Subfile Type: multi-page document (2 = 0x2)
  Image Width: 2340 Image Length: 1654
  Resolution: 200, 200 pixels/inch
  Bits/Sample: 8
  Compression Scheme: Old-style JPEG
  Photometric Interpretation: min-is-black
  FillOrder: msb-to-lsb
  YCbCr Subsampling: 2, 2
  YCbCr Positioning: centered
  Orientation: row 0 top, col 0 lhs
  Samples/Pixel: 1
  Rows/Strip: 1654
  Planar Configuration: single image plane
  Page Number: 0-0
  Software: Apeos C7070
  JpegInterchangeFormat: 306
  JpegInterchangeFormatLength: 405550
  JpegProc: 1
  JpegRestartInterval: 0

But when i use python, get the under error.
PIL.UnidentifiedImageError: cannot identify image file '20230822143148.tif'

What did you expect to happen?

Pillow will open the file without error.

What actually happened?

I get the under error.
PIL.UnidentifiedImageError: cannot identify image file '20230822143148.tif'

What are your OS, Python and Pillow versions?

• OS: Windows 10 (22H2)
• Python: 3.9.13
• Pillow: 9.5.0

code goes here

[radarhere]

Can you attach a copy of the image itself?

[xiaoyzhou]

20230822143148.zip
@radarhere

I upload it.

[xiaoyzhou]

Test code.

import sys
from PIL import Image, TiffImagePlugin, features

filename = sys.argv[1]

TiffImagePlugin.DEBUG = True
TiffImagePlugin.READ_LIBTIFF = True

with Image.open(filename, mode='r', formats=['TIFF']) as img:
  img.load()
  TiffImagePlugin.READ_LIBTIFF = False
  print(img.width, img.height)
  print(img.info)

print(features.version_codec("libtiff"))

[radarhere]

I've created PR #7415 to resolve this.

In the meantime, here's a version of your code with a line added to make it work.

import sys
from PIL import Image, TiffImagePlugin, features

filename = sys.argv[1]

TiffImagePlugin.DEBUG = True
TiffImagePlugin.READ_LIBTIFF = True

# New line
TiffImagePlugin.OPEN_INFO[(b"II", 6, (1,), 1, (8,), ())] = ("L", "L")

with Image.open(filename, mode='r', formats=['TIFF']) as img:
  img.load()
  TiffImagePlugin.READ_LIBTIFF = False
  print(img.width, img.height)
  print(img.info)

print(features.version_codec("libtiff"))

[xiaoyzhou]

Thanks a lot。