# [Image Output] tab

- [Normal Output]
- [Output after Partially Composing Image]
- [Output after Composing Image]
- [ImagePDF]
  - [Image Resolution]
  - [Image Color Type]
  - [Downsampling of ImagePDF]
  - [Image Compression]
  - [Range of page for ImagePDF]

## [Normal Output]

A regular output method.

## [Output after Partially Composing Image]

If display content not supported by this product, such as an overlap of text and image, is detected, only that portion is converted to image before the PDF is output.
It provides higher reproducibility of the original document than [Normal Output], while the printing speed will be slower.

## [Output after Composing Image]

All overlaps of text and image are converted to image before the PDF is output.
It provides higher reproducibility of the original document than [Normal Output] and [Output after Composing Image], while the printing speed will be slower.

## [ImagePDF]

This function converts the displayed content of the original document into images before creating a PDF file.
Outputting the content as images enables you to reproduce complicated drawings that otherwise cannot be converted into a PDF file.
You can specify the page to be converted into an image, select a compression method and embed document text information.
Note
Selecting the [ImagePDF] check box will make [Resolution] and [Delete Blank Pages] unavailable in the [Page Settings] tab.

### [Embed Transparent Text]

Because text is also output as images, it is generally impossible to search and copy text in an image PDF.
However, scanning text content and embedding it as transparent text make it possible to search and copy text.

### [Image Resolution]

Set resolution (pixels per inch).
Generally, the higher the resolution, the more accurate the document layout will be, while the file size will become larger.
[Screen] (72 dpi) or [96 dpi] will be good enough to only display a PDF file on a monitor.
However, specifying the resolution of 150 dpi or less may cause differences between the page content displayed in the application and the content of the created PDF file (for example, different spacing).
Note
If you want to output a PDF file without changing the layout of the original document or perform high-quality printing, specify the resolution of 300 dpi or greater.

### [Image Color Type]

Set the color of image to be created (monochrome, grayscale, full color).

### [Downsampling of ImagePDF]

Set the interpolation method and the resolution (must be 72 dpi or greater) to perform downsampling.
Specifying the interpolation method and the resolution of downsampling reduces the number of pixels to the resolution which is designated by the selected interpolation method, if the original document has an image with higher resolution than the designated resolution.
Enter the number of pixels per inch into the resolution.

#### [Decrease Image's Sample Point:]

When performing downsampling of images, select this check box, select the interpolation method from the drop-down list, and enter the resolution.

#### [Bilinear]

Calculates the average value of adjacent pixels and replace the entire area with the average pixel color of the specified resolution.
The image quality will be lower than the bicubic method, while the data size will become smaller.

#### [Bicubic]

Performs the same processing as the bilinear method in a wider scope.
The gradation of an image will be smoother than the bilinear method, while the data size will become larger.

#### [Supersampling]

Reduces jagged edges that are generated on diagonal or curved parts of the outline of an object drawn in an image.

### [Image Compression]

#### [Compression Method:]

Select this to compress an image and select an appropriate compression format in the box below.

#### [JPEG (Quality-Highest)] - [JPEG (Quality-Lowest)]

This is suitable for an image with a high resolution and large file size, or for continuous-tone images such as photographs.
[JPEG (Quality-Lowest)] applies maximum compression and [JPEG (Quality-Highest)] applies minimum compression.
The size of the file can be reduced by compression, but the higher the compression rate is, the lower the image quality becomes.

#### [Run Length]

This is suitable for monochrome images that consist of large solid areas of black and white.

#### [Zip]

This is suitable for comparatively small images with many components of uniform density and without gradation such as illustrations and screen shots.
There is no image quality degradation in Zip compression, but the compression rate is low and the file size will be large.

#### [CCITT Group3]/[CCITT Group4]

These are the methods that are used for fax transmission and suitable for monochrome documents created using a graphics application.
These methods are free from loss of data due to compression, and support most image compression formats.
[CCITT Group 4] has a compression rate three times greater than that of [CCITT 3].

#### [Range of page for ImagePDF]

[All] or [Specify Pages] can be selected. Only the pages selected for this option will be output as image PDFs.
Pages other than those selected in [Specify Pages] will be processed as normal output.
If you need only the selected pages, select the [Output the Specified Pages Only] check box.