Adaptive threshold filter |

Adaptive threshold filter

Introduction.

Used instruments: Adaptive threshold filter.

Objects of research: half-hue image of blood particles (Greyscale_picture.jpeg).

Task: to conduct a transformation of half-hue image into binary image.
 
NOTE: Tutorial does not contain the information on all the possibilities of the application. Here the optimal way of solving the task set is offered.
 

Step 1. Launch of the application

Launch the Altami Studio application. In order to launch the application, use the Altami Studio shortcut at the workbench or the menu item StartProgramsAltami LtdAltami Studio 3.0. Besides, the application can be launched from the folder where the application was installed (usually it is C:\Program Files\Altami Ltd\Altami Studio 3.0\).
 

Step 2. Opening the file

In Altami Studio application open the file with the image, in order to do that use the menu item FileOpen and select the Greyscale_picture.jpeg. It is in Tutorials\Pictures folder which is in the main folder of the application. Click the Open button.
 
The following image shall appear in the application window:
 
Opened document in Altami Studio application

Image 1. Opened document in Altami Studio application

 

Step 3. Adding the Adaptive threshold filter to the document

In order to use the Adaptive thresholdfilter, use the Filters panel through the FiltersFilters menu.
 
Opening the Filters panel

Image 2. Opening the Filters panel

 
Then at the appeared Filters panel click at the right button of the mouse and in the appeared menu select FiltersGray transformationsAdaptive threshold.
 
Adding the Adaptive threshold filter
Image 3. Adding the Adaptive threshold filter

 

Step 4. Setting the Adaptive threshold filter

By selecting the Adaptive threshold filter at the Filters panel in its lower part there appears a window with the settings of this filter.
 
Adaptive Threshold filter

Image 4. Adaptive Threshold filter

 
Here you can turn on and turn off the filter having put in and put away the tick in the check box in front of the enabled parameter.
 
Settings panel of the Adaptive threshold filter
Image 5. Settings panel of the Adaptive threshold filter

 
Leave the value of the newValue parameter as 255 by default.

Leave the value of the threshOperation parameter defined by default, that means, as threshBinary.

Define the value of the blockSize as 150, as it is shown in the image 6.
 
Changing the value of the Block size parameter

Image 6. Changing the value of the Block size parameter

 
Specify the threshValue parameter as 25.00.
 
Changing the value of the Threshold value parameter
Image 7. Changing the value of the Threshold value parameter

 
Change the value of the threshOperation parameter to ThreshBinaryInv.
 
Changing the value of the Operation parameter
Image 8. Changing the value of the Operation parameter