Working with images

working with images

In the Graphic settings, Layout settings and Page element settings dialog box an Image tab is present through which you can load an image to be displayed in different contexts.

Image displaying is defined through the following controls:

  • Field: this button enables you to link the image to a field of the data source, if present.
  • File: click here to display a standard File open dialog box that will enable you to select an image file and load it.
  • Scanner: click here to display a list of available TWAIN sources (scanners, digital cameras, etc). Importing images from a TWAIN source is managed by the selected device driver.
  • Clipart: click here to display the Clipart selection dialog box (not available in the light version).
  • Remove: click here to delete the current image.
  • Zoom: this combo box enables you to define the type of resizing to be applied to the image displayed inside the Graphic element bounding rectangle. The options are:
    • (None): non zoom is applied and the image it's shown with in its original size.
    • Proportional: the image is resized as large as possible but the original width and height proportions are maintained.
    • Stretch: resizes the image to cover the entire surface of the containing graphic element, without honoring the original proportions.
  • Alignment: combo box to define the alignment of the image inside its layout rectangle. This option gets deactivated in case zoom mode is set to Stretch.
  • RGB settings: 5 controls are present that enable you to control RGB attributes:
    • Red value.
    • Green value.
    • Blue value.
    • Image transparency (Alpha).
    • Color intensity (Gamma).
  • Interpolation: image quality rendering algorithm. The options are:
    • Low quality: the image is rendered in low quality (fastest).
    • High quality: the image is rendered in high quality.
    • Bilinear: no pre-filtering applied. This mode is unsuitable for images that need to be reduced below 50% of their original size.
    • Bicubic: no pre-filtering applied. This mode is unsuitable for images that need to be reduced below 25% of their original size.
    • Nearest neighbor (default): aka Jagged interpolation mode. Suitable for non anti-alias images.
    • HQ bilinear: high quality bilinear. A pre-filtering algorithm is applied to ensure a high quality resizing.
    • HQ bicubic: high quality bicubic. A pre-filtering algorithm is applied to ensure a high quality resizing. This mode produces resized images with the highest quality (slowest).

Note:
Applying transparency, color intensity or high quality interpolation modes can reduce the software performance since a considerably higher amount of CPU work is required by these algorithms.
It is advisable to use these functions carefully.