Simple Unified Interface to Read Bitmap Images (BMP,JPEG,PNG,TIFF)

Identifies and reads Windows BMP, JPEG, PNG, and TIFF format bitmap images. Identification defaults to the use of the magic number embedded in the file rather than the file extension. Reading of JPEG and PNG image depends on libjpg and libpng libraries. See file INSTALL for details if necessary.

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) 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, jpeg, png, and 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

install.packages('readbitmap')

Latest Version

if (!require("devtools")) install.packages("devtools")
devtools::install_github('jefferis/readbitmap')

Dependencies

The jpeg, png, and 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/