https://github.com/heyvito/colorarty

🎨 Extracts predominant colors from a given image
https://github.com/heyvito/colorarty

color golang-library golang-package image-processing predominant-color

Last synced: 3 months ago
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🎨 Extracts predominant colors from a given image

• Host: GitHub
• URL: https://github.com/heyvito/colorarty
• Owner: heyvito
• License: mit
• Created: 2016-10-25T20:27:08.000Z (about 8 years ago)
• Default Branch: master
• Last Pushed: 2017-09-08T01:56:20.000Z (over 7 years ago)
• Last Synced: 2024-06-19T17:50:51.556Z (7 months ago)
• Topics: color, golang-library, golang-package, image-processing, predominant-color
• Language: Go
• Homepage:
• Size: 5.86 KB
• Stars: 9
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# colorarty

[![Go Report Card](https://goreportcard.com/badge/github.com/victorgama/colorarty)](https://goreportcard.com/report/github.com/victorgama/colorarty)

[![GoDoc](https://godoc.org/github.com/victorgama/go-unfurl?status.svg)](https://godoc.org/github.com/victorgama/go-unfurl)

**colorarty** is a small library that analyses images and extracts a background, primary, secondary and detail colors, all suitable for reading.

Here's a simple example that converts extracted colors into CSS declarations:

```go

package main

import (

	"fmt"

	"image"

	"image/color"

	_ "image/jpeg"

	"os"

	"github.com/victorgama/colorarty"

)

func main() {

	reader, _ := os.Open("/Users/victorgama/Downloads/sample.jpeg")

	img, _, _ := image.Decode(reader)

	result := colorarty.Analyse(img)

	fmt.Printf("#background { background: %s }\n", toCSS(*result.BackgroundColor))

	fmt.Printf(".primary { color: %s }\n", toCSS(*result.PrimaryColor))

	fmt.Printf(".secondary { color: %s }\n", toCSS(*result.SecondaryColor))

	fmt.Printf(".detail { color: %s }\n", toCSS(*result.DetailColor))

}

func toCSS(c color.Color) string {

	cr, cg, cb, _ := c.RGBA()

	r := float64(cr)

	g := float64(cg)

	b := float64(cb)

	r /= 0x101

	g /= 0x101

	b /= 0x101

	return fmt.Sprintf("rgba(%.0f, %.0f, %.0f, 1)", r, g, b)

}

```

The generated CSS was used to build this next example:

![example](https://i.imgur.com/LroDbI4.png)

## Installing

1. Download and install it:

```

$ go get -u github.com/victorgama/colorarty

```

2. Import it in your code:

```go

import "github.com/victorgama/colorarty"

```

## License

**colorarty** was inspired by [this](https://panic.com/blog/itunes-11-and-colors/) post and [this](https://github.com/panicinc/ColorArt) project, both from Panic, Inc. 💖🦄

```

MIT License

Copyright (c) 2016 Victor Gama

Permission is hereby granted, free of charge, to any person obtaining a copy

of this software and associated documentation files (the "Software"), to deal

in the Software without restriction, including without limitation the rights

to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

copies of the Software, and to permit persons to whom the Software is

furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all

copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

SOFTWARE.

```