fpng 0.1.0

Very fast .PNG image writer for Python

py-fpng-nb

Very fast .PNG image(24/32bpp) writer for Python.

Compared to typical PNG libraries, its compression is about 10-20x faster, while producing 10-50% larger files.

• Homepage: https://github.com/dofuuz/py-fpng-nb
• PyPI: https://pypi.org/project/fpng/

py-fpng-nb is a Python wrapper of fpng

Installation

pip install fpng

If installation fails, upgrade pip with python -m pip install --upgrade pip and try again.

Usage

with PIL

import fpng
from PIL import Image

# ...

img.save('file_path.png', 'FPNG')

with NDarray

n-dimensional arrays of NumPy, PyTorch, TensorFlow, JAX, and CuPy.

Must have 3 dimensions [height, width, channels] with RGB or RGBA format.

import fpng

# ...

png_bytes = fpng.from_ndarray(img_ndarray)

with open('file_path.png', 'wb') as f:
    f.write(png_bytes)

with OpenCV

import cv2
import fpng

# ...

png_bytes = fpng.from_cv2(img_mat)

with open('file_path.png', 'wb') as f:
    f.write(png_bytes)

Benchmark

Comparison with Pillow 11.0.0

Compressing photo

x86_64	AArch64(ARM64)

Compressing screenshot

Screenshot of Wikipedia

x86_64	AArch64(ARM64)