imgii

imgii is an image rendering program and library that renders colored ANSI-encoded ASCII art as a PNG and saves the output file. Supports popular image types as input, such as PNG, JPEG, GIF, WEBP, and more.

Building

Requires the Rust compiler.

git clone https://github.com/Stattek/imgii.git
cd imgii
# it's recommended to use a release build to run this program
cargo build --release

Library

Add to your Rust program, with the following command:

cargo add imgii

Usage

Usage: imgii [OPTIONS] <INPUT_FILENAME> <OUTPUT_FILENAME> [FINAL_IMAGE_INDEX]

Arguments:
  <INPUT_FILENAME>
          Path to the input image

          Can also specify a format for an input, if <FINAL_IMAGE_INDEX> is also set to the final input image index.

          Example: "input_image%d.png"

  <OUTPUT_FILENAME>
          Path to the output image

          Can also specify a format for an input, if <FINAL_IMAGE_INDEX> is also set to the final input image index (will use the same index as the original image).

          Example: "output_image%d.png"

  [FINAL_IMAGE_INDEX]
          Allows for converting multiple images. Specifies the final input image index. Index starts at 1

Options:
  -w, --width <WIDTH>
          Width (in characters) of the output image. To retain the image's original aspect ratio, only set this value.

          Defaults to 128 if width and height are not specified.

  -H, --height <HEIGHT>
          Height (in characters) of the output image, if not specified, it will be calculated to keep the aspect ratio

  -f, --font-size <FONT_SIZE>
          The font size of the output image. Larger font sizes incur harsher performance penalties.

          By default, uses a font size of 16.

  -i, --invert
          Inverts the weights of the characters. Useful for white backgrounds

  -b, --background
          Sets a black background behind the image.

          No background by default.

  -C, --charset <CHARSET>
          Characters used to render the image, from transparent to opaque. Built-in charsets: [block, emoji, default, russian, slight, minimal]

          [default: minimal]

  -o, --char-override <CHAR_OVERRIDE>
          Character override. Ignores the current charset and repeats the desired string for the entirety of the output image

  -h, --help
          Print help (see a summary with '-h')

  -V, --version
          Print version

Simple Example

# Makes assumptions about how to convert the image.
cargo run --release -- input_img.png output_ascii_img.png

Examples Using Arguments

# renders an image with a width of 150 characters, using the block charset.
# NOTE: Just setting --width will maintain the aspect ratio of the input
cargo run --release -- --charset block --width 100 input_img.png output_ascii_img.png

# Sets a background behind the result, can often look better
cargo run --release -- --background input.gif output_ascii.gif

# Forces the output to have a width of 10 characters and a height of 100 characters.
cargo run --release -- --width 10 --height 100 input.gif output_ascii.gif

Example With More Verbose Output

# Running with debug logs enabled
RUST_LOG=debug cargo run --release -- --background input_img.png output_ascii_img.png

# Running with info logs enabled
RUST_LOG=info cargo run --release -- --background input_img.png output_ascii_img.png

Supported Output Image Types

imgii can currently output the following filetypes: [png, gif]. It supports more input types but is able to output images in these formats.

Specifying Output Image Type

Specifying an output type can be done simply by changing the filetype in the output filename (in a similar way to ffmpeg -i input.png output.gif converting a png to gif).

# Takes an input GIF and imgii will convert to an output GIF
cargo run --release -- input.gif output.gif

Example Output

Original Image:

Output:

Others: