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image-modes.rst

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Modes

Possible :py:attr:`~pillow_heif.HeifImage.mode` modes are:

  • BGRA;16 or BGRa;16
  • BGR;16
  • RGBA;16 or RGBa;16
  • RGB;16
  • L;16
  • LA;16
  • I;16
  • I;16L
  • BGRA or BGRa
  • BGR
  • RGBA or RGBa
  • RGB
  • LA
  • L

Note

By default convert_hdr_to_8bit parameter in open_heif is True so all images will be opened as a 8 bit ones. To open images in BGR mode, set bgr_mode to True in open_heif/read_heif.

Starting from 0.11.2 version you can set hdr_to_16bit to False in open_heif/read_heif to get 10/12 bit images without bits shifted to 16 bit. Those will be RGB(A);10(12), BGR(A);10(12) modes instead of RGB(A);16, BGR(A);16.

When saving image from Pillow to HEIF format, next modes will be converted automatically before encoding:

  • P with transparency will be converted to RGBA
  • P will be converted to RGB
  • I will be converted to I;16L
  • 1 will be converted to L
  • CMYK will be converted to RGBA