This function queries both data and associated metadata from a BNF image
using specified parameters and return the information in a tidy data.frame
bi_all_data(
identifier = NULL,
region = c(0L, 0L, 500L, 500L),
size = "full",
rotation = 0,
quality = c("native", "color", "gray", "bitonal"),
format = c("jpg", "tif", "png", "gif", "jp2", "pdf")
)
Arguments
| identifier |
[character(1+)]
one or multiple identifier(s) of the document that begins
with "ark:/" |
| region |
[character(1) or integer(4)]
either "full" to retrieve the full image or a vector of
four integers that defines the region to extract from the
image. The vector has the form (x0, y0, w, h) with
x0, y0 the coordinates of the top left point of
the extracted region (with the origin at the top left of
the image), w the width of the extracted region and
h the height of the extracted region. |
| size |
[character(1) or integer(2)]
either "full" to retrieve the full region or a vector of
two integers that defines the size of the final image |
| rotation |
[numeric(1)]
an integer that defines the rotation in degrees to apply
to the final image (0 for no rotation) |
| quality |
[character(1)]
"native" for native colors of the image or,
"color" for the image in color,
"gray" for levels of gray,
"bitonal" for only black and white pixels.
|
| format |
[character(1)]
"jpg" for JPEG image,
"tif" for TIFF image,
"png" for PNG image,
"gif" for GIF image,
"jp2" for JP2 image,
"pdf" for PDF image.
|
Value
a tibble with both the image and the metadata, with one row per
identifier