Stats or Form Factors
The functions include:
Selecting statistics (see categories above), listing them, and making
Clearing individual statistics (they are chosen by categories) and
clearing certain kinds of statistics. This does not save much
calculation time, but it might avoid clutter in your output.
Listing measurements for individual objects or blobs.
Summarizing the measuremts.
Plotting the statistics.
Making a spreadsheet for further examination of the statistics or for
Parameters such as area
and centroid that describe the intensitiy, location
and shape of each blob can be selected for each blobbed image. They
are available after blobbing, and can be changed without re-blobbing.
Summary statistics for
all the blobs together are available after
blobbing for all of the shape and intensity parameters previously selected.
Choose parameters to print. Defaults to last
List selected stats?
Lists parameters chosen for the Blob Img.
Prints text tab-delimited table of blob parameters.
Print sel blob
Select blob by index (other parameters are
shown also). Prints parameters for this blob
Sorted stat list
Prints sorted list of the selected blob parameter.
Set Summary Statistics
Choose one or more of :mean :min :max and :variance.
Summary stat titles
Prints titles in a tab delimited row for spreadsheets.
Summary stat values
Prints values in a tab delimited row for spreadsheets.
2-D Plot .
3-D Plot Not
Note - when a parameter has
more than one value, such as the centroid (x
y) which has two, the statistics are reported for each of the values in
turn, as if they were distinct parameters. For the centroid, centroid-1 mean
is the mean for all of the X values.
Using summary statistics for
particles in a number of images:
1 Make a threshold slider window
and initialize the minimum area and
touch edge parameters.
+ '***Buttons*** / Th!'
- makes a thresholder slider.
+ (See above for Threshold
2 Set parameters in this (*Blob
+ Blob parameters: 'Stats
/ Set stats', choose among: area, perimeter,
.... See 'Info / Blob Parameters' for a list of theparameters.
+ Summary statistics:
'Stats / Set summary statistics', choose among
mean, min, ...
+ If you expect more
than 4096 blobs in your image, increase n_blobs
to a safe number with the 'Parameters' button.
3 Load an image
Most common way
is with '***Buttons*** / File / Open'
4 Select the thresholds
+ In the Threshold Slider,
use '?Windows? / Front window' to make the
slider work on the image.
+ Drag the left, center
or right parts of the red slider bar to select
objects. Objects should be red.
+ In the Threshold Slider,
use 'Thresholds / Blob'. See the green outlines
and the blob labels.
5 If this is the first image,
print the summary stat titles 'Stats / Summary stat titles'
6 Print the statistics values:
'Stats / Summary stat values'.
7 Close the image, do steps
3-6 for other images.
8 Cut and paste the summary
stats into either a spread sheet or text file
as desired. The rows are tab delimited, so the titles and values will
line up in, say, Excel, even if they do not appear to line up in the Lispix
text output window.