5.11. Export Image as TIFF

5.11. Export Image as TIFF
	5. File related Dialogs

Рисунок 15.66. The TIFF Export dialog

Сжатие

This option allows you to specify the algorithm used to compress the image.

None: is fast, and lossless, but the resulting file can be very large.
LZW: The image is compressed using the «Lempel-Ziv-Welch» algorithm, a lossless compression technique. This is efficient and fast. More information at [WKPD-LZW].
Упакованные биты: быстрый, простой алгоритм для кодирования длин серий данных. Apple представила формат PackBits в выпуске MacPaint на компьютере Макинтош. Поток данных PackBits состоит из пакетов из одного байта для заголовка и данных. Источник: [WKPD-PACKBITS].
Deflate: is a lossless data compression algorithm that uses a combination of the LZ77 algorithm and Huffman coding. It is also used in Zip and Gzip files and PNG images. Source: [WKPD-DEFLATE].
JPEG: is a very good compression algorithm but lossy. This is the same compression as used in JPEG images. Since it is lossy, you should not use this when image quality is important. This compression can not be used when your image is in indexed mode.

CCITT Group 3 fax and CCITT Group 4 fax are black and white formats developed to transfer images by FAX.

	Примечание
	These two compression modes can only be selected, if the image is in indexed mode and reduced to two colors. Use Image → Mode → Indexed to convert the image to indexed mode. Make sure that «Use black and white (1-bit) palette» is checked.

Save layers

You can save layers when exporting to TIFF. Each layer will be a separate page in the TIFF image.

Crop layers

When Save layers is checked, this option, which is enabled by default, will resize all layers to the size of the image. TIFF images can not have negative offsets. This option enables you to import the TIFF again without having to change the position of layers that had a different size as the image in the original.

Сохранить значения цвета прозрачных точек

When this is enabled the color values are saved even if the pixels are completely transparent.

Export as CMYK

Whether to export using a CMYK Color Profile.

Metadata (edit)

You can click the «(edit)» link to open the metadata editor to change or add any metadata that you want to be included in the image. Note: you will also still need to enable the relevant metadata saving options listed below.

Save Exif data

When this option is enabled existing EXIF metadata will be saved in the exported TIFF image.

Save IPTC data

When this option is enabled existing IPTC metadata will be saved in the exported TIFF image.

Сохранить данные XMP

When this option is enabled existing XMP metadata will be saved in the exported TIFF image.

Save color profile

When this option is enabled the color profile will be saved in the exported TIFF image.

Save thumbnail

When this option is enabled a thumbnail will be saved as the second page in the exported TIFF image. This will also cause certain EXIF tags to be saved even if you have disabled saving EXIF metadata.

Save GeoTIFF data

When this option is enabled GeoTIFF metadata that was present in the original image will be saved in the exported TIFF image.

Save comment

Here you can enable saving a comment that is associated with the image. The comment can be entered in the text box below this option.