Count/Size
The tool groups of the Count/Size ribbon allow you to count and measure objects in an image. An "object" is considered to be any contiguous group of pixels that share a specified range of intensity values. You can use the Count/Size commands to identify, count, and measure these objects.
The basic steps involved in counting and measuring objects in an image are:
- Identify and isolate the objects of interest in
the image. This
is done by defining the range of intensities (monochrome images) or the
colors (color images) that identify the objects you want to count/measure.
The tools
in the Segment group box are used
for this.
- Select the types of measurements you want to view. Use the Types command in the Count/Size group.
- Count and measure the objects using the Count
button.
- Refine the results by doing any or all of the following:
- Find object-clusters incorrectly identified
as single objects, and split them up. This
can be done manually or automatically, using the tools in the Split
group:
- Use measurement filters to filter out features
or noise that were mistakenly identified as objects of interest. For
example, if the objects of interest are all relatively the same size,
you can use an Area filter to filter out all regions that are too big
or too small. Use
the Edit Range tool in the Measurements for this.
- Click on features or noise that were mistakenly identified as objects of interest, and delete the ROI mistakenly identifying them as objects of interest.
Once you have correctly identified the objects of interest in the image, your measurement data can be viewed, saved, and edited from the Data Table. You can also classify, sort and graph your data using the commands in the Image group.
Tip: Counting/Sizing can be performed upon an entire image, or upon an active ROI.
Note: If you want to express your measurement results in terms other than the
default intensity and pixel-width values, you must calibrate the intensity
and spatial scales before you count and measure. See
the tools of the Calibration group on
the