Use the PROGMEM keyword (for AVR chips like Arduino Uno/Mega) to store the data in Flash instead of RAM.
It converts standard 24-bit color (RGB888) to the format used by TFTs like the ILI9341. Key Features of v2.3
If you’ve ever worked with small TFT LCD screens—like the popular 2.2”, 2.8”, or 3.5" MCUFriend displays on an Arduino—you know the pain of getting images to display properly. You load a JPG, and it looks like a mosaic of random pixels, or worse, the display stays white.
One of the most common pitfalls in embedded graphics is byte order mismatch. Version 2.3 includes a "Swap Bytes" toggle to address displays that expect Big Endian input (common in older Solomon SSD and Ilitek ILI controllers) versus the native Little Endian of the MCU memory.
If you're currently working on an embedded display project, have you tried using RGB565 images? What challenges have you faced with your workflow? imageconverter 565 v2.3
No major rewrite ("v3.0") has gained the same traction because v2.3 "just works." Its stability, low resource usage, and predictable output make it a classic.
For versions integrated with UTFT, the process was likely more visual and GUI-driven, with options to select output type and array formatting.
Add this to your Makefile or PlatformIO script:
ImageConverter 565并非一个通用的图片编辑软件，而是一款功能极其精准的图片转换工具。它的核心任务只有一个：将我们常见的PNG、JPG、JPEG或BMP图片，转换为特定的 格式的原始数据。 Use the PROGMEM keyword (for AVR chips like
Follow these steps to convert an image using the v2.3 interface: 1. Source Image Preparation
Select RAW (for SD card) or C Array (for compilation into firmware). Click Convert: The tool will generate the output file. 3. Integrating with UTFT (SD Card Method)
is designed to transform your graphics into memory-efficient formats for use with Arduino, chipKit, and other microcontroller platforms. Version 2.3 includes improved stability and optimized array generation for high-speed display libraries. Key Conversion Steps Prepare Your Image
Helps in handling portrait vs. landscape image mapping. Step-by-Step: Using ImageConverter 565 v2.3 You load a JPG, and it looks like
| Tool | Key Feature | Limitation | |------|-------------|-------------| | | Simple, fast, batch+CLI | Windows-only GUI | | LVGL Image Converter | Online web tool, supports multiple color formats | Requires internet, limited file size | | GIMP with export script | Full editing suite | Complex setup, not purpose-built | | Python PIL script | Infinite flexibility | Must write and maintain code |
: Microcontrollers waste processing cycles stripping down 24-bit chunks into a format their hardware controllers understand. RGB565 halves the footprint to 16 bits (2 bytes) per pixel: Red : 5 bits (32 intensity levels)
Let's walk through converting a 24-bit PNG logo into a C array for an Arduino project driving a 128x64 TFT display.
(specifically version 2.3 ) is a legacy utility tool developed by Henning Karlsen as part of his UTFT library tools. It is primarily used to convert standard image files (like .jpg or .png) into RGB565 raw pixel data or C-formatted arrays for use with Arduino or other microcontrollers driving TFT displays. Key Features of Version 2.3