PNG-FI Portable Network Graphics¶
Extensions: .png
A PNG format based on the Freeimage library.
This format supports grayscale, RGB and RGBA images.
The freeimage plugin requires a freeimage binary. If this binary not available on the system, it can be downloaded manually from <https://github.com/imageio/imageio-binaries> by either
- the command line script
imageio_download_bin freeimage
- the Python method
imageio.plugins.freeimage.download()
Parameters for reading¶
- ignoregamma : bool
- Avoid gamma correction. Default True.
Parameters for saving¶
- compression : {0, 1, 6, 9}
- The compression factor. Higher factors result in more compression at the cost of speed. Note that PNG compression is always lossless. Default 9.
- quantize : int
- If specified, turn the given RGB or RGBA image in a paletted image for more efficient storage. The value should be between 2 and 256. If the value of 0 the image is not quantized.
- interlaced : bool
- Save using Adam7 interlacing. Default False.