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make_thumbnails

Source: R/make_thumbnails.R
make_thumbnails.Rd

Convert Pages to Image Thumbnails

Usage

make_thumbnails(
  file,
  outdir = NULL,
  pages = NULL,
  format = c("png", "jpeg", "bmp", "gif"),
  resolution = 72,
  password = NULL,
  copy = FALSE
)

Arguments

file

A character string specifying the path or URL to a PDF file.

outdir

An optional character string specifying a directory into which to split the resulting files. If NULL, the outdir is tempdir(). If file is a URL, both file and thumbnails are stored in the R session's temporary directory.

pages

An optional integer vector specifying pages to extract from.

format

A character string specifying an image file format.

resolution

A numeric value specifying the image resolution in DPI.

password

Optionally, a character string containing a user password to access a secured PDF.

copy

Specifies whether the original local file(s) should be copied to tempdir() before processing. FALSE by default. The argument is ignored if file is URL.

Value

A character vector of file paths.

Details

This function save each (specified) page of a document as an image with 720 dpi resolution. Images are saved in the same directory as the original file, with file names specified by the original file name, a page number, and the corresponding file format extension.

Note

This may generate Java “INFO” messages in the console, which can be safely ignored.

References

Tabula

See also

extract_tables, extract_text, make_thumbnails

Author

Thomas J. Leeper <thosjleeper@gmail.com>

Examples

# simple demo file
f <- system.file("examples", "mtcars.pdf", package = "tabulapdf")

make_thumbnails(f)
#> [1] "/tmp/RtmpufqTSf/mtcars1.png" "/tmp/RtmpufqTSf/mtcars2.png"
#> [3] "/tmp/RtmpufqTSf/mtcars3.png"