Getting 'wrong' metadata

[neal3000]

I have some code that uses pillow to read in the metadata added by Comfyui to a PNG file. And that works fine.
But if I take an image and use imagemagick to convert it, keeping the meta data, and then try and read it I get metatadata:{'chromaticity': (0.3127, 0.329, 0.64, 0.33, 0.3, 0.6, 0.15, 0.06)} which is not what I want.
Using exiftool -PNG:all ComfyUI_04572_.png. from the command line I see the metadata I want
Datetimestamp : 2024-12-31T02:55:02+00:00
Prompt : {"5": {"inputs": {"width": 1440, "height": 1280, "batch_size": 1},....

I'm guessing the issue is there is multiple metadata in the PNG file, and the "chromaticity" is taking precedence. If that is the case, is there any way to tell Pillow to look for alternative metadata, or return all possible metadata ?

Thank

ps I have tried alternatives, and none of them have worked (pypng and piexif)

[radarhere]

Could you attach a copy of the ComfyUI image, and a copy of the ImageMagick image?

Ideally, it would also be helpful if you could provide a simple example of Pillow code reading the metadata from the ComfyUI image.

[neal3000]

my code:

image = PILImage.open(filename)
metadata = image.info

  "data": {
    "chromaticity": [
      "0.3127",
      "0.329",
      "0.64",
      "0.33",
      "0.3",
      "0.6",
      "0.15",
      "0.06"
    ]
  }
}

exiftool

exiftool -PNG:all ComfyUI_04525_.png 
Image Width                     : 1440
Image Height                    : 1280
Bit Depth                       : 8
Color Type                      : RGB
Compression                     : Deflate/Inflate
Filter                          : Adaptive
Interlace                       : Noninterlaced
White Point X                   : 0.3127
White Point Y                   : 0.329
Red X                           : 0.64
Red Y                           : 0.33
Green X                         : 0.3
Green Y                         : 0.6
Blue X                          : 0.15
Blue Y                          : 0.06
Background Color                : 255 255 255
Datecreate                      : 2024-12-30T07:05:02+00:00
Datemodify                      : 2024-12-30T07:05:02+00:00
Datetimestamp                   : 2024-12-31T02:53:56+00:00
Prompt                          : {"5": {"inputs": {"width": 1440, "height": 1280, "batch_size": 1}, "class_type": "EmptyLatentImage"}, "8": {"inputs": {"samples": ["15", 0], "vae": ["14", 0]}, "class_type": "VAEDecode"}, "9": {"inputs": {"filename_prefix": "ComfyUI", "images": ["8", 0]}, ....

ComfyUI_04525_ - https://github.com/user-attachments/assets/fd340680-7a10-4621-b455-efc12056a2ca

[neal3000]

ps the code:

from PIL import Image as PILImage
image = PILImage.open(filename)
metadata = image.info

works fine if the image came from Comfyui and had not been resized by imagemagick

[radarhere]

from PIL import Image
im = Image.open("comfy.png")
im.load()
for k, v in im.info.items():
    print(k+": "+str(v)[:100])

will give you

chromaticity: (0.3127, 0.329, 0.64, 0.33, 0.3, 0.6, 0.15, 0.06)
date:create: 2024-12-30T07:05:02+00:00
date:modify: 2024-12-30T07:05:02+00:00
date:timestamp: 2024-12-31T02:53:56+00:00
prompt: {"5": {"inputs": {"width": 1440, "height": 1280, "batch_size": 1}, "class_type": "EmptyLatentImage"}
workflow: {"last_node_id": 28, "last_link_id": 54, "nodes": [{"id": 20, "type": "PreviewImage", "pos": {"0": 1

Is that all you were after?

[radarhere]

As an explanation, see https://pillow.readthedocs.io/en/stable/handbook/image-file-formats.html#png

As of Pillow 6.0, EXIF data can be read from PNG images. However, unlike other image formats, EXIF data is not guaranteed to be present in info until load() has been called.

[neal3000]

Thank you so much, that's 100% what I was looking for.

simply using

image0 = PILImage.open(filename)
mtext = image0.text

worked