| Maintainer: | Gregory Jefferis <jefferis@gmail.com> |
| License: | GPL-2 | GPL-3 [expanded from: GPL (≥ 2)] |
| Title: | Read Windows Bitmap (BMP) Images |
| Author: | Gregory Jefferis |
| Description: | Reads Windows BMP format images. Currently limited to 8 bit greyscale images and 24,32 bit (A)RGB images. Pure R implementation without external dependencies. |
| Version: | 0.3 |
| Suggests: | pixmap, testthat |
| Collate: | 'read-bmp.R' |
| RoxygenNote: | 6.0.1 |
| NeedsCompilation: | no |
| Packaged: | 2017-09-11 11:13:00 UTC; jefferis |
| Repository: | CRAN |
| Date/Publication: | 2017-09-11 11:50:08 UTC |
Fix a 32 bit unsigned integer that has been read as signed
Description
This is really just to fix a limitation of readBin/R's 32 bit signed ints
Usage
ConvertIntToUInt(x, adjustment = 2^32)
Arguments
x |
Number to be fixed |
adjustment |
number to be added to convert to uint32 (2^32 by default) |
Value
numeric value of uint32
Author(s)
jefferis
See Also
Returns TRUE if file is a Windows BMP image
Description
NB this just checks the magic 'BM' in the first two bytes of the file
Usage
is.bmp(source)
Arguments
source |
file or connection |
Value
TRUE or FALSE
Author(s)
jefferis
Open windows BMP format image files
Description
Limited to 8 bit greyscale images and 24 bit RGB images.
Usage
read.bmp(f, Verbose = FALSE)
Arguments
f |
File to open |
Verbose |
Give verbose warnings (default FALSE) |
Value
array of dims height x width x channels
Author(s)
jefferis
Examples
## Not run:
library(pixmap)
r=read.bmp('myrgbimage.bmp')
pr=pixmapRGB(r)
r=read.bmp('mygreyimage.bmp')
pr=pixmapGrey(r)
plot(pr)
## End(Not run)