TiffCompression enumeration
TiffCompression enumeration
Specifies what type of compression to apply when saving page images into a TIFF file.
Members
Name | Description |
---|---|
NONE | Specifies no compression. |
RLE | Specifies the RLE compression scheme. |
LZW | Specifies the LZW compression scheme. In Java emulated by Deflate (Zip) compression. |
CCITT3 | Specifies the CCITT3 compression scheme. |
CCITT4 | Specifies the CCITT4 compression scheme. |
Examples
Shows how to select the compression scheme to apply to a document that we convert into a TIFF image.
doc = aw.Document()
builder = aw.DocumentBuilder(doc)
builder.insert_image(IMAGE_DIR + "Tagged Image File Format.tiff")
# Create an "ImageSaveOptions" object which we can pass to the document's "save" method
# to modify the way in which that method renders the document into an image.
options = aw.saving.ImageSaveOptions(aw.SaveFormat.TIFF)
# Set the "tiff_compression" property to "TiffCompression.NONE" to apply no compression while saving,
# which may result in a very large output file.
# Set the "tiff_compression" property to "TiffCompression.RLE" to apply RLE compression
# Set the "tiff_compression" property to "TiffCompression.LZW" to apply LZW compression.
# Set the "tiff_compression" property to "TiffCompression.CCITT3" to apply CCITT3 compression.
# Set the "tiff_compression" property to "TiffCompression.CCITT4" to apply CCITT4 compression.
options.tiff_compression = tiff_compression
doc.save(ARTIFACTS_DIR + "ImageSaveOptions.tiff_image_compression.tiff", options)
if tiff_compression == aw.saving.TiffCompression.NONE:
self.assertLess(3000000, os.path.getsize(ARTIFACTS_DIR + "ImageSaveOptions.tiff_image_compression.tiff"))
elif tiff_compression == aw.saving.TiffCompression.RLE:
self.assertLess(6000, os.path.getsize(ARTIFACTS_DIR + "ImageSaveOptions.tiff_image_compression.tiff"))
elif tiff_compression == aw.saving.TiffCompression.LZW:
self.assertLess(200000, os.path.getsize(ARTIFACTS_DIR + "ImageSaveOptions.tiff_image_compression.tiff"))
elif tiff_compression == aw.saving.TiffCompression.CCITT3:
self.assertGreater(90000, os.path.getsize(ARTIFACTS_DIR + "ImageSaveOptions.tiff_image_compression.tiff"))
elif tiff_compression == aw.saving.TiffCompression.CCITT4:
self.assertGreater(20000, os.path.getsize(ARTIFACTS_DIR + "ImageSaveOptions.tiff_image_compression.tiff"))
See Also
- module aspose.words.saving