User manual

Conversion options for JPEG and JPEG2000 format
When you save a PDF document in an image format, each page is saved as a separate file.
By default, files are saved in the same folder as the source file.
If you have combined and converted multiple JPEG files into an Adobe PDF file
and you want to retrieve one or more of the JPEG images for editing, you can use the
Export function of the Picture Task plug-in to export images in JPEG format and open
them in an image-editing application.
Note that the options available depend on whether you are converting a document to JPEG
or JPEG2000.
Grayscale, Color
Choose a compression level. These settings are designed to balance file size with image
quality. The smaller the file, the lesser the image quality. (See Compressing and
downsampling images.)
Tile Size
Divides the image being compressed into tiles of the given size. (If the image height or
width is not an even multiple of the tile size, partial tiles are used on the edges.) Image
data for each tile is individually compressed and can be individually decompressed. The
default value of 256 is generally a good one. It works well with the other compression
parameters, such as the number of resolutions. This option is available only for JPEG2000
format.
Format
For JPEG files, Baseline (Standard) uses a format recognizable to most web browsers.
Baseline (Optimized) optimizes the color quality of the image and produces a slightly
smaller file size. This option is not supported by all web browsers. Progressive downloads
the image first as a low-resolution image, with progressive improvement in quality as
downloading continues.
RGB, CMYK, Grayscale
Specifies the type of color management to be applied to the output file. Embed Profile
places an ICC profile matching the current working space into the output file. Embedding
the working space profile may increase file size. Off does not add any profile to the output
file. Ask When Saving displays a dialog box that lets the user choose whether to embed or
discard the ICC profile from the input file. The size of the profile is given.
Note: If you use the Save As or Export All Images command on a PDF document that
contains JPEG and JPEG2000 images, and convert the content to JPEG or JPEG2000
format, the resulting image may look different when opened in Acrobat. This can happen
if the images have a color profile included at the page level but not inside the image data.
In this case, Acrobat cannot bring the page-level color profile into the resulting saved
image.
Colorspace/Resolution
For Colorspace, let Acrobat determine the color space, or choose Color: RGB, Color:
CMYK, or Grayscale. Choose Grayscale, for example, to convert color images in the file
to shades of gray. Choose Color: RGB or Color: CMYK to override the document's
original color management information with the default settings. For Resolution, let
Acrobat determine the resolution automatically, or choose 72, 96, 150, 300, 600, 1200, or
2400 ppi. You can also type a resolution from 1 to 2400 ppi.
Note: Higher resolutions, such as 2400 ppi, are suitable only for small page sizes (up to
6.826 inches).
Defaults
Restores all settings in the dialog box to the default settings.