Image to Character Art Image Node's

Ascii Art Node

Features

• Converts an input image into its ASCII art Image.
• Preset ASCII character Sets.
• Switch between colored and grayscale modes
• Switch between white and Black Backgrounds with the invert switch
• Gamma control on the output image
• Output to a text file (due to text file spacing the output won't look the same as the image in the gallery)

Inputs

Parameter	Description
input_image	The input image that you want to convert to ASCII art.
font_spacing	Font spacing for the ASCII characters.
ascii_set	Choose the desired ASCII character set.
color_mode	Whether to use colors in the ASCII art or not.
invert_colors	Invert background color and ASCII character order.
output_to_file	Output ASCII art to a text file.
gamma	Gamma correction value for the output image.
board	Pick Board to add output too.

Unicode Art Node

Features

• Converts an input image into its Unicode art Image.
• Preset Unicode character Sets.
• Switch between colored and grayscale modes
• Switch between white and Black Backgrounds with the invert switch
• Gamma control on output image (an external font is required for Unicode, but will be automatically downloaded and cached for future use)

Inputs

Parameter	Description
input_image	The input image that you want to convert to Unicode art.
font_size	Font size for the Unicode characters.
unicode_set	Choose the desired Unicode character set.
color_mode	Whether to use colors in the Unicode art or not.
invert_colors	Invert background color and Unicode character order.
gamma	Gamma correction value for the output image.
board	Pick Board to add output too.

i2aa Any Font Node (skunkworxdark)

Features

• Converts an input image into its ASCII art image but you can use any font or range of characters.
• Font download into a font_cache in the same way as the textfontimage node.
• A large array of predefined character ranges and an option to provide a custom string of characters.
• Switch between colored and grayscale output
• The output image is built by comparing the image one character-sized block at a time to determine which character to use for that block of the image. For this you can choose comparison methods to use. As a starting point, I would recommend using NAL or MSE as these produce the best output in most cases at a reasonable speed.
  • Sum of Absolute Differences (SAD) - This is a basic math approach to see which character is the least different
  • Mean Squared Error (MSE) - This uses a mathematical approach that takes into account a bit more of the structure.
  • Structural Similarity (SSIM) - This is VERY VERY Slow but it attempts to find the character with the closest structural similarity for each block. This sometimes works better if the convert to mono is used and is included only for completeness.
  • Normalized Average Luminance (NAL) - This is very quick and produces quite a good result. It works by calculating the average luminance of each available character and then normalizes this to the full 0-255 range and then compares this to the average luminance of each block of the image to determine which is the best character to use.
• Can select which board to output to.

Inputs

Parameter	Description
input_image	The input image that you want to convert to Unicode art.
font_url	Path/Name of the font to use.
local_font_path	URL address of the font file to download.
local_font	Local font file path (overrides font_url)
font_size	Name of the local font file to use from the font_cache folder
character_range	The character range to use.
custom_characters	Custom Characters only used if Custom is selected from range
comparison_type	Choose the comparison type.
mono_comparison	Convert input image to mono for comparison.
color_mode	Enable color mode (default: grayscale).
board	Pick Board to add output too.

Examples

Ascii Art Node

Unicode Art Node

i2aa Any Font Node