Press the Format button when exporting PDF content and switch to the Image tab.

When image output is enabled in the General format tab, FlexiPDF produces copies of all images stored in the PDF.

The options in this tab are mainly concerned with the scaling or size of the images output.

FlexiPDF can deal with two types of image in PDF: vector illustrations consisting of lines, curves, filled areas and bitmap images or photographs made up of many coloured pixels.

FlexiPDF cannot output vector formats directly but will instead convert any such illustrations into a bitmap format by a process called rasterization.

  • Auto-identify vector artwork
    Many PDF documents may contain vector artwork or line art. However, due to the nature of PDF, it is not always possible for a computer program to determine where on a page such artwork occurs since each page is stored as a general mix of text, images and line art.
    FlexiPDF is capable, to an extent, of identifying such artwork on a page. Selecting this option will cause FlexiPDF to automatically convert vector artwork in the original into images in the output format selected.
    If you are unsure if an graphic is an image or vector artwork, see Exporting graphics.
    If you encounter problems with illustrations not being correctly identified, use the Link tool to mark them up with Image Box links. See Exporting images.
    FlexiPDF can only output images in bitmap formats, not vector graphics formats. If images do not appear in your final output documents, try turning this option on or placing an image box around the missing images.
  • Use original OPI name if available
    If your PDF contains OPI placement information for the images within it, FlexiPDF will use the original filename for images it exports.
    You can check if an image has associated OPI information by selecting the image with the Object tool, then clicking the right mouse button and choosing Image Properties.

Image Scaling

This set of options allows you to set the output scaling of the images that FlexiPDF extracts from a PDF.

When disabled, images are output as they are found in the PDF. This may give very large images since many PDF documents contain high-resolution versions of an image which are then scaled by the PDF viewer to the correct size.

  • Fix image resolution at
    This option scales output images so that they are all at the same resolution in dpi (dots per inch). Resolutions available are: 72, 100, 150, 300, 400, 600, 720, 800 and 1200 dpi.
    This setting is particularly important when rendering vector artwork.
  • Advanced Scaling pop-up
    Three types of advanced scaling can be selected from the drop down menu. For each kind of scaling, if either width or height is set to zero, then an image’s aspect ratio is maintained.
    • Set image size
      Enables exact image sizes to be specified in pixels. Images will be sub-sampled or expanded accordingly.
    • Maximum size
      Enables a maximum image size to be specified. If an image is smaller than the width and height values given, then the scaling is unchanged. When Max scaling occurs, the aspect ratio is maintained. So, for example an image which is 800 by 400 when output at a Max of 200 by 200 will be rendered as 200 by 100 – the shape of the image is maintained.
    • Scale
      Will resize images according to a percentage value.
  • Colour depth to use when rendering
    This pop-up tells FlexiPDF how to render any marked up regions during export. It also controls how pages are rendered if the Convert each page into an image option is enabled in the General tab. It has no affect on the export of non-rendered images such as photos – these are, in most cases, output with the colour depth at which they are stored in the PDF.
    You can determine the colour depth of images stored in a PDF by clicking on an image using the Object tool , then choosing Object > Image > Properties.