analyze image
Before you can generate statistical information about the objects in an image, you must analyze
it. During the analysis, the system scans the image, determines the boundary of each separate
object in the image, determines the number and shape of all the holes in each object, and
optionally performs a variety of geometric measurements of each object.
Because the geometrical analysis can be time consuming, and because you may not wish to use
some of the available measurements, you can "turn off" certain parts of the processing.
The three toggles in the menu function as follows:
- Perform Basic Calculations
- If set to No, no measurements are performed, and you cannot create
graphs or statistics files. All you can do is create new bitmaps and vector files. You should
generally set this toggle to No when all you want to do is convert a bitmap into a vector
image. If this toggle is set to Yes, then the following measurements are available:
- Area
- Length
- Orientation
- Elongation
- Holes
- Throat
- Radius
- Horizontal Position
- Vertical Position
- Calculate Perimeters/Tortuosity
- If set to No, the system skips the calculation of object
perimeters, which is somewhat time-consuming. If set to Yes , the calculation is performed, and
the Perimeter and Tortuosity are available.
- Calculate Roughness
- If set to No, the system skips the calculation of object roughness, which
is somewhat time-consuming. If set to Yes, the calculation is performed, the roughness is
available.
To start the analysis, click on the ANALYZE THE IMAGE menu field.
(Note: the Shape Harmonics are not calculated unless you specifically ask for them in a graph,
because they take a long time to calculate.)