Depending on how you have acquired the images that are going to be converted into PDF they may require rotating into the correct orientation (ie the right way up). But for most users they won't - so the default is not to rotate images.
Image Rotation: 90 Degrees
Purpose:
Images are rotated by 90 degrees clockwise.
Notes:
This is useful if you have an image acquisition process (eg fax receiving, automatic sheet fed scanning) that produces images that need rotating by a fixed amount.
This may take some time to complete for larger images.
Image Rotation: 180 Degrees
Purpose:
Images are rotated by 180 degrees.
Notes:
This is useful if you have an image acquisition process (eg fax receiving, automatic sheet fed scanning) that produces images that need rotating by a fixed amount.
This may take some time to complete for larger images.
Image Rotation: 270 Degrees
Purpose:
Images are rotated by 270 degrees clockwise.
Notes:
This is useful if you have an image acquisition process (eg fax receiving, automatic sheet fed scanning) that produces images that need rotating by a fixed amount.
This may take some time to complete for larger images.
Image Rotation: Auto Portrait View 90 Degrees
Purpose:
Images are rotated by 90 degrees clockwise only if the image is not in portrait orientation.
Notes:
This is useful if you have an image acquisition process (eg fax receiving, automatic sheet fed scanning) that produces images that always need to appear in a portrait orientation but are not necessarily acquired in this orientation.
Portrait orientation is where an image is taller than it is wide.
This may take some time to complete for larger images.
Image Rotation: Auto Portrait View 270 Degrees
Purpose:
Images are rotated by 270 degrees clockwise only if the image is not in portrait orientation.
Notes:
This is useful if you have an image acquisition process (eg fax receiving, automatic sheet fed scanning) that produces images that always need to appear in a portrait orientation but are not necessarily acquired in this orientation.
Portrait orientation is where an image is taller than it is wide.
This may take some time to complete for larger images.
Image Rotation: Auto Landscape View 90 Degrees
Purpose:
Images are rotated by 90 degrees clockwise only if the image is not in landscape orientation.
Notes:
This is useful if you have an image acquisition process (eg fax receiving, automatic sheet fed scanning) that produces images that always need to appear in a landscape orientation but are not necessarily acquired in this orientation.
Landscape orientation is where an image is wider than it is tall.
This may take some time to complete for larger images.
Image Rotation: Auto Landscape View 270 Degrees
Purpose:
Images are rotated by 270 degrees clockwise only if the image is not in landscape orientation.
Notes:
This is useful if you have an image acquisition process (eg fax receiving, automatic sheet fed scanning) that produces images that always need to appear in a landscape orientation but are not necessarily acquired in this orientation.
Landscape orientation is where an image is wider than it is tall.
This may take some time to complete for larger images.
Image Effects: Flip Horizontally
Purpose:
Images have their pixels reversed horizontally from left to right.
Notes:
Horizontal flipping is also known as mirror imaging.
This is useful if you have an image acquisition process (eg web cam) that produces images that may require mirroring.
This may take some time to complete for larger images.
Image Effects: Flip Vertically
Purpose:
Images have their pixels reversed vertically from top to bottom.
Notes:
This may take some time to complete for larger images.
Image Effects: Grayscale
Purpose:
Converts the image from color into a grayscale equivalent.
Notes:
This is useful if you have an image acquisition process (eg scanning) that produces images that should be grayscale but have a slight color shift.
This is quite common on scanners that scan black and white documents in a color mode which normally introduces slight coloring around the edges of text.
This may take some time to complete for larger images.
Image Effects: Negative
Purpose:
Converts the image by inverting the RGB color of each pixel.
Notes:
This is useful if you have an image acquisition process (eg slide scanning) that acquires images in a negative format.
This may take some time to complete for larger images.
JPEG Image Re-Compression
Purpose:
Forces all JPEG images to be re-compressed at the required quality level.
Notes:
You do not gain anything by re-compressing an already low quality JPEG image into a higher quality one because the quality of the image does not improve but the filesize gets larger.
This is useful if you have existing high quality images which are large in file size and you want to reduce the overall file size of the final PDF. By re-compressing JPEG images you can lower the quality to an acceptable level for your requirements and enjoy a large space saving.
By default, JPEG images are not re-compressed, and the images are embedded into the PDF without being modified.
This may take some time to complete for larger images.
JPEG Image Re-Compression: Quality Control
Purpose:
Sets the required JPEG re-compression level.
Notes:
There are 10 levels of JPEG re-compression available from level 1 (low quality which produces low file sizes) up to level 10 (high quality which produces high file sizes).
A reasonable compromise between quality and file size is normally a quality setting of around 6 or 7 - this does of course vary depending on the image.
This may take some time to complete for larger images.
JPEG Image Re-Compression: Quality Display
Purpose:
Displays the currently selected JPEG re-compression level.
