class FilePipeline::FileOperations::PtiffConversion
Saves a file to a tiled multi-resolution TIFF ('pyramid'), as required by e.g. the IIP image server.
See iipimage.sourceforge.io/documentation/images/ or www.loc.gov/preservation/digital/formats/fdd/fdd000237.shtml for more information on the format.
Public Class Methods
new(options)
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Returns a new instance.
Options¶ ↑
-
:tile
- Writes a tiled TIFF (defaulttrue
) -
:tile_width
: Tile width in pixels (default256
) -
:tile_height
: Tile height in pixels (default256
)
Calls superclass method
# File lib/file_pipeline/file_operations/default_operations/ptiff_conversion.rb, line 21 def initialize(**opts) defaults = { tile: true, tile_width: 256, tile_height: 256 } super(opts, defaults) @options[:pyramid] = true end
Public Instance Methods
operation(src_file, out_file)
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Writes a pyramid tiff version of src_file
to out_file
.
# File lib/file_pipeline/file_operations/default_operations/ptiff_conversion.rb, line 34 def operation(*args) src_file, out_file = args image = Vips::Image.new_from_file src_file image.tiffsave(out_file, **options) # Return lof if any end
target_extension()
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Returns '.tiff'
(all files created by operation
will be TIFF files).
# File lib/file_pipeline/file_operations/default_operations/ptiff_conversion.rb, line 43 def target_extension '.tiff' end