MNIST

Description

Raw MNIST dataset as PNG images.

Download

wget 'https://huggingface.co/datasets/teleprint-me/mnist/resolve/main/mnist.tar.gz?download=true' -O mnist.tar.gz
wget 'https://huggingface.co/datasets/teleprint-me/mnist/resolve/main/sha256sum.txt?download=true' -O sha256sum.txt

Validate

sha256sum -c sha256sum.txt

Expected output:

mnist.tar.gz: OK

Extract

tar xf mnist.tar.gz

This will create a top-level mnist/ directory containing the dataset.

Metadata

• 70,000 images
• 10 classes (digits 0–9)
• PNG format
• 28×28 pixels (784 total pixels per image)
• 8-bit grayscale
• Non-interlaced

Disk Usage

du -hs mnist
276M    mnist

Count Total Images

find mnist -type f | wc -l
70000

Count Images per Class

ls -1 mnist/training/0 | wc -l
5923

Inspect Metadata

file mnist/training/0/10005.png
mnist/training/0/10005.png: PNG image data, 28 x 28, 8-bit grayscale, non-interlaced

ImageMagick

identify mnist/training/0/10005.png
mnist/training/0/10005.png PNG 28x28 28x28+0+0 8-bit Grayscale Gray 256c 242B 0.000u 0:00.000

To view detailed metadata, use the -verbose flag:

identify -verbose mnist/training/0/10005.png

Example output:

Image:
  Filename: mnist/training/0/10005.png
  Format: PNG (Portable Network Graphics)
  Geometry: 28x28+0+0
  Colorspace: Gray
  Type: Grayscale
  Depth: 8-bit
  Pixels: 784
  ...

The full output includes histogram, colormap, transparency, and statistical details, which are omitted here for brevity.