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dither

(★ 52)

Small image utility featuring an implementation of the median-cut color quantization algorithm and Floyd-Steinberg dithering in C.

파일 탐색기

최종 버전 다운로드 (.zip)

- bird-auto.32.png
- bird-original.png
- flower-bw.png
- flower-original.png
- gray-dithered.png
- gray-original.png
- - DTDither.h
  - DTImage.h
  - DTPalette.h
  - MCQuantization.h
- DTDither.c
- DTImage.c
- DTPalette.c
- main.c
- MCQuantization.c
.gitignore
dither.pod
LICENSE
Makefile
README.md

# 설치 가이드

1. 코드 내려받기

git clone https://github.com/tessarin/dither

깃허브에서 프로젝트 코드 전체를 내 컴퓨터로 내려받습니다.

cd dither

방금 내려받은 프로젝트 폴더 안으로 이동합니다.

2. Make

보통 추천

사전 준비물

Git GitHub에서 프로젝트 코드를 내려받으려면 필요합니다.
Make Linux/macOS는 보통 기본 설치되어 있습니다. Windows는 별도 설치(예: MSYS2, WSL)가 필요합니다.

make

생성된 빌드 설정을 바탕으로 실제 컴파일을 진행해 실행 파일을 만듭니다.

✅ 에러 없이 끝나면 성공입니다. 생성된 실행 파일을 직접 실행해보세요.

// repository documentation

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# Dither - Color Quantization and Dithering

This is a small program dedicated to reducing the number of colors in an
image. It operates with files in PNG or binary PPM format ([Portable
PixMap][ppm]), and features automatic palette generation (using a median-cut
algorithm) and dithering implemented with the Floyd-Steinberg method.

## Installing

#### On macOS with [Homebrew][brw]

$ brew install tessarin/core/dither

#### Manual Installation

First, install [`libpng`][lpg]. Running `make` will then compile the program
and generate the documentation (requires Perl). To install, move the
executable and manual files to appropriate directories in your system.

$ make
    $ mv dither ~/bin
    $ mv dither.1 ~/man/man1

Individual targets can also be specified to only compile the program or to
generate the manual page:

$ make dither
    $ make doc

## Usage

$ dither [-p name.size] [-dv] input output

Detailed information about the program options are included in the
[manual][man].

## Features

By default, `dither` will use a 3-bit RGB palette and dithering when
processing an image. Other possible palettes include:

- Grayscale of any given size
 - Automatic, generated with the given size using a median-cut quantization
   algorithm
 - Custom palette

Dithering on the final image can be disabled and the program can also be used
just to generate a palette.

## Samples

#### Automatic Palette

$ dither -p auto.32 bird-original.png bird-auto.32.png

![original bird](https://raw.githubusercontent.com/tessarin/dither/master/samples/bird-original.png)
![generated bird](https://raw.githubusercontent.com/tessarin/dither/master/samples/bird-auto.32.png)

#### 1-bit Black & White

$ dither -p bw flower-original.png flower-bw.png

![original flower](https://raw.githubusercontent.com/tessarin/dither/master/samples/flower-original.png)
![generated flower](https://raw.githubusercontent.com/tessarin/dither/master/samples/flower-bw.png)

#### 50% Gray Test

Generates a perfect checkerboard pattern.

$ dither -p bw gray-original.png gray-dithered.png

![original gray](https://raw.githubusercontent.com/tessarin/dither/master/samples/gray-original.png)
![dithered gray](https://raw.githubusercontent.com/tessarin/dither/master/samples/gray-dithered.png)

[ppm]: https://en.wikipedia.org/wiki/Netpbm_format
 [brw]: https://brew.sh
 [lpg]: http://www.libpng.org/pub/png/libpng.html
 [man]: dither.pod