PlanarConfiguration save

[VariableDeclared]

What did you do?

• Open a file using Pillow Image.open im = Image.open(..blah)
• downscale the image using Image.thumnail im.thumbnail(..blah)
  • (Args: (512, 512), Image.ANTIALIAS)
• Save the image using save function, only passing new file name im.save('file_two.tif/tiff') - Same issue for tiff and tif.

What did you expect to happen?

Image would be saved, scaled down, and viewable.

What actually happened?

Image was downscaled, but corrupt, appears red and pixellated, cannot be opened in some image viewers.

Note: I cannot repeat this on Mac OS, haven't tried this on Debian... yet.

What are your OS, Python and Pillow versions?

• OS: Windows 10 Version 10.0.17763 Build 17763
• Python: Python 3.6.8
• Pillow: Pillow 5.4.1

from PIL import Image
import os


mode = input("Enter mode")

files = [f for f in os.listdir('./{}'.format(mode)) if os.path.isfile(os.path.join('./{}'.format(mode), f))]

im = Image.open('./{}/{}'.format(mode, files[0]))
im.show()

input()
im.thumbnail((512, 512), Image.ANTIALIAS)

im.save('./PILissue.tiff')

[cgohlke]

The PlanarConfiguration tag value is wrong. It should be CONTIG (but is SEPARATE). You can verify by patching the example file with a hex editor at position 126 from 2 to 1.

[radarhere]

You've provided a copy of the output image. Are you able to provide a copy of one of the images that you are running this script over?

[cgohlke]

It seems any input image with PlanarConfiguration=2 will trigger this bug.

[radarhere]

Ok, thanks. On macOS 10.14, if I try to save https://github.com/python-pillow/Pillow/blob/master/Tests/images/tiff_tiled_planar_raw.tif I get a black image.

im = Image.open('tiff_tiled_planar_raw.tif')
im.save('out.tif')

Presuming that this is the same issue, if you're interested in an immediate solution, I would recommend adding in im._planar_configuration = 1 -

from PIL import Image
import os


mode = input("Enter mode")

files = [f for f in os.listdir('./{}'.format(mode)) if os.path.isfile(os.path.join('./{}'.format(mode), f))]

im = Image.open('./{}/{}'.format(mode, files[0]))
im.show()

input()
im.thumbnail((512, 512), Image.ANTIALIAS)
im._planar_configuration = 1
im.save('./PILissue.tiff')

[radarhere]

I've created #5973 to fix this.