Definiens Developer 7

Definiens Developer 7 - User Guide
5 Load and Manage Data
Note
The scaling results may differ depending on the scale mode. Example: If you enter 40,
you work at the following scales, which are calculated differently:
Options dialog box setting
Units (m/pixel)
Magnification
Percent
Pixels
Scale of the scene copy or subset to be created
40m per pixel
40x
40% of the resolution of the source scene
1 pxl per 40 pxl of the source scene
5.1.2.4 Import Image Layers of Different Scale
You can insert image layers and thematic layers with different resolutions (scale) into
Definiens Developer.
They need not have the same number of columns and rows. To combine image layers of
different resolution (scale), the images with the lower resolution—having a larger pixel
size—are resampled to the size of the smallest pixel size. If the layers have exactly the
same extent and geographical position, then geocoding is not necessary for the
resampling of images.
Figure 33: Left: Higher resolution - small pixel size. Right: Lower resolution - image is resampled to
be imported.
5.1.2.5 About Geocoding
Geocoding is the assignment of positioning marks in images by coordinates. The
position marks serve as geographic identifiers. but geocoding is helpful for life sciences
image analysis too. Typical examples include working with subsets, at multiple
magnifications, or with thematic layers for transferring image analysis results.
Geocoding information is automatically detected by Definiens Developer or can be
entered manually. Images without geocodes create automatically a virtual coordinate
system with 0/0 upper left and the unit of 1 pixel. For such images, geocoding
represents the pixel coordinates instead of geographic coordinates.
Definiens Developer cannot reproject image or thematic layers. Therefore all image
layers must belong to the same coordinate system in order to be read properly. If the
coordinate system is supported, geographic coordinates from inserted files are detected
automatically. If the information is not included in the image file but is nevertheless
available, you can open a dialog for each layer to insert the geocoding information
Layer Properties on
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