https://github.com/jeroen/webp

R bindings for libwebp
https://github.com/jeroen/webp

Last synced: 9 days ago
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R bindings for libwebp

• Host: GitHub
• URL: https://github.com/jeroen/webp
• Owner: jeroen
• License: other
• Created: 2015-12-26T20:58:01.000Z (almost 9 years ago)
• Default Branch: master
• Last Pushed: 2024-10-03T18:17:51.000Z (about 1 month ago)
• Last Synced: 2024-10-11T18:19:49.504Z (25 days ago)
• Language: R
• Homepage:
• Size: 47.9 KB
• Stars: 14
• Watchers: 2
• Forks: 4
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • Changelog: NEWS
  • License: LICENSE

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• jimsghstars - jeroen/webp - R bindings for libwebp (R)

README

        
# webp

> A New Format for Lossless and Lossy Image Compression

[![AppVeyor Build Status](https://ci.appveyor.com/api/projects/status/github/jeroen/webp?branch=master&svg=true)](https://ci.appveyor.com/project/jeroen/webp)

[![Coverage Status](https://codecov.io/github/jeroen/webp/coverage.svg?branch=master)](https://codecov.io/github/jeroen/webp?branch=master)

[![CRAN_Status_Badge](http://www.r-pkg.org/badges/version/webp)](https://cran.r-project.org/package=webp)

[![CRAN RStudio mirror downloads](http://cranlogs.r-pkg.org/badges/webp)](https://cran.r-project.org/package=webp)

Lossless webp images are 26% smaller in size compared to PNG. Lossy

webp images are 25-34% smaller in size compared to JPEG. This package reads

and writes webp images into a 3 (rgb) or 4 (rgba) channel bitmap array using

conventions from the 'jpeg' and 'png' packages.

## Hello World

```r

# Convert to webp

library(png)

img <- readPNG(system.file("img", "Rlogo.png", package="png"))

write_webp(img, "rlogo.webp")

browseURL("rlogo.webp")

rm(img)

# Convert from webp

library(jpeg)

img <- read_webp("rlogo.webp")

writeJPEG(img, "rlogo.jpeg")

browseURL("rlogo.jpeg")

```

## Installation

Binary packages for __OS-X__ or __Windows__ can be installed directly from CRAN:

```r

install.packages("webp")

```

Installation from source on Linux or OSX requires [`libwebp`](https://developers.google.com/speed/webp/). On __Debian__ or __Ubuntu__ install [libwebp-dev](https://packages.debian.org/testing/libwebp-dev):

```

sudo apt-get install -y libwebp-dev

```

On __Fedora__ we need [libwebp-devel](https://src.fedoraproject.org/rpms/libwebp):

```

sudo yum install libwebp-devel

````

On __CentOS / RHEL__ we install [libwebp-devel](https://src.fedoraproject.org/rpms/libwebp) via EPEL:

```

sudo yum install epel-release

sudo yum install libwebp-devel

```

On __OS-X__ use [webp](https://github.com/Homebrew/homebrew-core/blob/master/Formula/webp.rb) from Homebrew:

```

brew install webp

```