read_tags: Read TIFF tag information without actually reading the image...

Description Usage Arguments Value Author(s) See Also Examples

View source: R/read.R

Description

TIFF files contain metadata about images in their TIFF tags. This function is for reading this information without reading the actual image.

Usage

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read_tags(path, frames = 1)

tags_read(path, frames = 1)

Arguments

path

A string. The path to the tiff file to read.

frames

Which frames do you want to read tags from. Default first frame only. To read from the 2nd and 7th frames, use frames = c(2, 7), to read from all frames, use frames = "all".

Value

A list of lists.

Author(s)

Simon Urbanek, Kent Johnson, Rory Nolan.

See Also

read_tif()

Examples

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read_tags(system.file("img", "Rlogo.tif", package = "ijtiff"))
read_tags(system.file("img", "Rlogo-banana.tif", package = "ijtiff"),
  frames = c(2, 4)
)

Example output

$frame1
$frame1$width
[1] 100

$frame1$length
[1] 76

$frame1$bits_per_sample
[1] 8

$frame1$samples_per_pixel
[1] 4

$frame1$sample_format
[1] "uint"

$frame1$planar_config
[1] "contiguous"

$frame1$rows_per_strip
[1] 76

$frame1$compression
[1] "LZW"

$frame1$x_resolution
[1] 299.99

$frame1$y_resolution
[1] 299.99

$frame1$resolution_unit
[1] "inch"

$frame1$orientation
[1] "top_left"

$frame1$color_space
[1] "RGB"


$frame2
$frame2$width
[1] 100

$frame2$length
[1] 78

$frame2$bits_per_sample
[1] 8

$frame2$samples_per_pixel
[1] 3

$frame2$sample_format
[1] "uint"

$frame2$planar_config
[1] "contiguous"

$frame2$rows_per_strip
[1] 78

$frame2$compression
[1] "deflate"

$frame2$software
[1] "ijtiff package, R 4.0.0"

$frame2$color_space
[1] "black is zero"


$frame4
$frame4$width
[1] 100

$frame4$length
[1] 78

$frame4$bits_per_sample
[1] 8

$frame4$samples_per_pixel
[1] 3

$frame4$sample_format
[1] "uint"

$frame4$planar_config
[1] "contiguous"

$frame4$rows_per_strip
[1] 78

$frame4$compression
[1] "deflate"

$frame4$software
[1] "ijtiff package, R 4.0.0"

$frame4$color_space
[1] "black is zero"

ijtiff documentation built on June 28, 2021, 9:07 a.m.