https://github.com/jefferis/readbitmap

R package to identify and read bitmap images
https://github.com/jefferis/readbitmap

bmp jpeg png r tiff

Last synced: 27 days ago
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R package to identify and read bitmap images

• Host: GitHub
• URL: https://github.com/jefferis/readbitmap
• Owner: jefferis
• Created: 2011-12-12T14:27:24.000Z (almost 13 years ago)
• Default Branch: master
• Last Pushed: 2018-06-27T11:48:46.000Z (over 6 years ago)
• Last Synced: 2024-09-25T12:14:50.044Z (about 1 month ago)
• Topics: bmp, jpeg, png, r, tiff
• Language: R
• Homepage: http://jefferis.github.io/readbitmap
• Size: 75.2 KB
• Stars: 4
• Watchers: 1
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# readbitmap

[![Build Status](https://travis-ci.org/jefferis/readbitmap.svg)](https://travis-ci.org/jefferis/readbitmap)

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

## Introduction

**readbitmap** is a simple R package that provides a function `read.bitmap` to read

standard bitmap format images, identifying them by their image header 

(or [magic value](https://en.wikipedia.org/wiki/Magic_number_(programming)#Magic_numbers_in_files))

rather than relying on the file extension.

  * See http://jefferis.github.io/readbitmap for online documentation.

  * Currently supports BMP, JPEG, PNG and TIFF images

  * ... via [bmp](https://cran.r-project.org/package=bmp), [jpeg](https://cran.r-project.org/package=jpeg), [png](https://cran.r-project.org/package=png), and

  [tiff](https://cran.r-project.org/package=tiff) packages. 

  * includes function to identify images by magic values 

    (standard file extensions can also be used)

  * Includes simple test suite

## Installation

### Regular CRAN Install

```r

install.packages('readbitmap')

```

### Latest Version

```r

if (!require("devtools")) install.packages("devtools")

devtools::install_github('jefferis/readbitmap')

```

## Dependencies

The [jpeg](https://cran.r-project.org/package=jpeg),

[png](https://cran.r-project.org/package=png), and 

[tiff](https://cran.r-project.org/package=tiff) R packages depend on system

libjpeg, libpng and libtiff libraries.  These are pretty much always installed on unix

like systems (e.g. linux, macosx). Failing that, see:

  * http://www.libpng.org/

  * http://ijg.org/

  * http://www.libtiff.org/

For Windows, binary installs of the jpeg and png packages include the libjpeg

and lipng available on winbuilder and therefore no system library is required.

The winbuilder libraries are part of a collection provied by Brian Ripley at:

  http://www.stats.ox.ac.uk/pub/Rtools/goodies/multilib/

The file is called `local323.zip` at the time of writing.

For windows users building from source, the libraries are part of the Rtools

bundle available at:

  http://cran.r-project.org/bin/windows/Rtools/