HEIC support

[unmade]

No description provided.

[bigcat88]

from pillow_heif import HeifImagePlugin

that's all.

[unmade]

Hey, @bigcat88

I've actually already found your library and big thanks for that!

I probably go with pi-heif though to be compliant with license. My main use-case is to make thumbnails for different image formats anyway.

I also need to read exif information from HEIC image. Currently, I'm relying on pillow _getexif method, but for HEIC it gives me AttributeError, so I need to research that a bit

Wasn't expecting someone to find that issue, so was a little bit lazy to fill in the description ;)

[bigcat88]

I also need to read exif information from HEIC image. Currently, I'm relying on pillow _getexif method, but for HEIC it gives me AttributeError, so I need to research that a bit

that's strange, I have tests for EXIF in repository...
metadata_exif_test.py -> getexif method from Pillow

[unmade]

.getexif() works just as expected. However it gives significantly less information compared to private ._getexif() method regardless whether the image is heic or jpeg

[unmade]

I probably just switch to exifread to read EXIF

[bigcat88]

.getexif for HEIF files give all exif info. If not then it is probably a bug - can you provide some code and a test image file to see if it is?
For JPEG as I remember it is the same.

P.S: exifread has only partial HEIF support, it will not parse .hif files(Canon cameras format) and .heif files(Nokia format). Maybe others HEIF formats too, there are so many of them except HEIC

[unmade]

I'm testing on photos I took with iPhone 8. Here is sample images:

• HEIC
• JPEG

The .getexif() method gives me following information:

{
    'TileWidth': 512,
    'TileLength': 512,
    'GPSInfo': 1728,
    'ResolutionUnit': 2,
    'ExifOffset': 230,
    'Make': 'Apple',
    'Model': 'iPhone 8',
    'Software': '11.3.1',
    'Orientation': 1,
    'DateTime': '2018:05:28 20:35:36',
    'YCbCrPositioning': 1,
    'XResolution': 72.0,
    'YResolution': 72.0
}

The exifread gives slightly more information, such as ApertureValue, ShutterSpeedValue, etc...:

{
    'Image Make': (0x010F) ASCII=Apple @ 170,
    'Image Model': (0x0110) ASCII=iPhone 8 @ 176,
    ...
    'GPS GPSLatitudeRef': (0x0001) ASCII=N @ 1738,
    'GPS GPSLatitude': (0x0002) Ratio=[52, 22, 389/20] @ 1902,
    ...
    'EXIF ExposureTime': (0x829A) Ratio=1/873 @ 620,
    'EXIF FNumber': (0x829D) Ratio=9/5 @ 628,
    ...
}

For JPEGs images Pillow's private _getexif() method also gives that "extended" information, but public .getexif() gives the short one.

Here is a short script showing the difference between methods:
https://www.dropbox.com/s/37iq7cl0s2n22fu/exif.py?dl=0

Usage:

python3 exif.py IMG_5196.jpg

[bigcat88]

    im = Image.open("IMG_5196.HEIC")
    img_exif = im.getexif()._get_merged_dict()
    for key, val in img_exif.items():
        if key in ExifTags.TAGS:
            print(f'{ExifTags.TAGS[key]}:{val}')

[bigcat88]

python-pillow/Pillow#6641 (comment)

[unmade]

Works like a charm! I had to go deeper with getexif() method :)

Thank you so much for helping me out!