Imageconverter 565 V2.3 May 2026

ImageConverter 565 v2.3 is a specialized utility developed by Rinky-Dink Electronics designed to convert standard image files (like .BMP, .PNG, or .JPG) into high-performance data arrays for use with microcontrollers like Arduino and chipsets such as the TTGO . It is particularly popular among hobbyists and engineers working with small TFT/LCD screens that require the RGB565 color format. Key Functions and Features

Format Conversion: It transforms standard images into a .c (C source) file or .raw data. The output is typically a large array of const unsigned short (16-bit) values, which represent colors in 5 bits for Red, 6 for Green, and 5 for Blue .

Optimization for Microcontrollers: By converting images to code, developers can store graphics directly in the microcontroller's Flash memory (using PROGMEM) rather than relying on external SD cards, which can be slower to access .

Resolution Control: The software allows users to manually set the output resolution and offers an option to "Lock aspect ratio" to prevent image distortion during resizing . imageconverter 565 v2.3

Header Data: Generated files include metadata such as original filename, dimensions, and total size in bytes to help manage memory allocation in your code .

User Interfaces: Creating custom buttons, logos, or icons for embedded touchscreen projects .

Static Backgrounds: Loading high-resolution background images for games or dashboards on low-power devices . ImageConverter 565 v2

Efficient Rendering: Using 16-bit 565 format reduces the memory footprint compared to standard 24-bit or 32-bit images, which is critical for devices with limited RAM. How to Use It Select Image: Open your target photo in the tool.

Configure Size: Enter the required dimensions (e.g., 480x320 or 135x240) .

Export: Save the file, which generates a .c file containing the raw pixel data array. Convert with Floyd–Steinberg dithering

Integration: Include the generated .c file in your Arduino IDE or C project and call the specific array name using your display library (like UTFT or TFT_eSPI) .

Technical White Paper: ImageConverter 565 v2.3

Subject: Analysis of Embedded Graphics Asset Preparation and RGB565 Conversion Version: 2.3 Date: October 26, 2023

CLI examples (recommended flags)

• Convert with Floyd–Steinberg dithering, premultiplied alpha, 320x240, output C header: imageconverter565 -i input.png -o out.h --format c-header --width 320 --height 240 --dither fs --alpha premultiply --bg 0x000000 --endian little
• Produce raw little-endian RGB565 + alpha mask: imageconverter565 -i sprite.png -o sprite.rgb565 --raw --endian little --alpha mask8 -m sprite_alpha.bin
• Create tiled output (16x16 tiles) with ordered dither: imageconverter565 -i tileset.png -o tiles.bin --tile 16x16 --dither ordered4x4 --format raw

5.1 Workflow Integration

The typical workflow for ImageConverter 565 v2.3 involves three stages:

1. Design: Artists create assets in standard tools (Photoshop/GIMP) using sRGB color space.
2. Conversion: The user drags files into the ImageConverter GUI (or runs the CLI script). Settings are adjusted for endianness (Little Endian is standard for ARM Cortex-M).
3. Implementation: The generated .h file is included in the firmware project. The tft.pushColor() function is called to stream the array to the display.