esp32_sd_lcd_image_viewer/helper/README.md

Helper

Introduction

This subdirectory delivers simple helper programs.

progressive_to_normal_jpegs.sh

Converts progressive jpegs into non progressive ones.

Requirements:

Ensure jpegtran is installed.

• Linux
  • Arch:

    sudo pacman -S libjpeg-turbo

  • Debian:

    sudo apt install libjpeg-turbo-progs

• macOS:

  brew install jpeg

Usage:

./progressive_to_normal_jpegs.sh /path/to/images

resize.py

Handy tool to resize images to displays size (480x800).

Disclaimer:

This tool takes 1 command line argument, the directory where the files-to-be-converted are stored.

Requirements:

Virtual Environment (optional)

• create a venv:

  python -m venv .env

• activate venv
  • Linux/macOS:

    source .env/bin/activate

  • Windows

    ./.env/Scripts/activate.bat

Python-Pillow

pip install pillow

Usage:

python resize.py /path/to/images