L-VIS User Manual
82
LOYTEC
Version 6.2
LOYTEC electronics GmbH
Below the image tiles is a group of buttons to manipulate the selected images or load new
images. The following functions are available:
Add:
Opens a file dialog to select and load a new image. Another option to add
new images is to just drop the file anywhere inside the image manager window.
Reload:
Causes the selected images to be reloaded from their last known source
file (as shown in the tool tip). This can be useful to refresh a project when still
working on an image in an external graphics program.
Resize:
This button is used to resize the selected images. For each image, a
dialog is shown to enter the desired new size. The original image data is need for
this function. In case it is not embedded in the project, it will be reloaded from
the last known location on disk (see also Section 8.7.2).
Copy:
Creates copies of the selected images. The duplicated images can then be
resized, rotated, or flipped as needed.
Replace:
Replaces all selected images with one new image loaded from a file on
disk. Remember to review the project for necessary changes in layout, if the
replacement image has different dimensions.
Reassign:
Similar to replace, but the replacement is picked from one of the
already loaded images.
Export:
Generate new image files on disk from all selected images in the project.
Remove:
Remove the selected (unused) images from the project. Any source
data which is no longer needed is removed as well.
Rotation:
Specify the amount of clockwise rotation, compared to the original
image.
Mirror:
Specify if the image is to be flipped along its horizontal or vertical axis.
Remove Unused:
This button will remove all images which are currently not
used in the project. This can also be done when the project is written to the
device. If there are any unused images at this time, a dialog appears is shown to
check if the unused images should be deleted before download or not.
8.7.2 Embedded Sources
When an image is loaded, its original file data is embedded in the project. This helps for
operations which need the original image data, when the project is edited in a different
environment than it was originally designed, and the original files are no longer available.
The same source data is embedded only once, even when it was imported a number of times
in different sizes or rotations. When the last image generated from a specific source file is
deleted, the embedded original data is removed as well.
8.7.3 Color Reduction
If a true color image is loaded, like for example a JPG or a 32-bit BMP or PNG file, the
configuration software will automatically create a VGA color version using a Floyd-
Steinberg dithering algorithm. When used in a VGA project, this color reduced version is
used, otherwise the original data is used if already available in JPG or PNG format, or the
original image data is converted to JPG or PNG, depending on the image properties.
In VGA projects, dithering will be noticeable when viewing the images from a close
distance, which will be OK for photo-realistic color graphics, but might be unwanted for
