Altami Software - software for image analysis
Altami Software
Software for image analysis

Threshold filter


Used instruments: Threshold filter.

Objects of examination: Halftone image of the blood particles (Greyscale_picture.jpeg).

Task: to conduct the transformation of the halftone image into binary image and delete noises.

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 Start→Programs→Altami Ltd→Altami 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 File→Open and mark the Greyscale_picture.jpeg file. It is in Tutorials\Picturesfolder which is in the main folder of the application. Click the Openbutton.

The following image shall appear in the application window:

Picture 1. Opened document in Altami Studio application

Step 3. Adding the Threshold filter to the document

In order to use the Threshold filter call the Filters panel through the Filters→Filters menu.

Image 2. Opening the Filters panel

Then at the appeared Filters panel click with the right button of the mouse, and at the context menu select Filters→Gray transformations→Threshold.

Image 3. Adding Threshold filter

Step 4. Adjusting the Threshold filter

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

Image 4. Threshold filter

Here you can turn on and turn off the filter having put and having put away the tick in the checkbox respectively near the enabled parameter.

Image 5. The settings panel of the Threshold filter

Leave the value of the newValue parameter as 255 by default. Indicate the value of the threshValue parameter as 155.00, as it is shown at the Image 6. Leave the value of the threshOperation parameter as ThreshBinary.

Image 6. Change of the value of the threshValue parameter

Change the value of the threshOperation parameter to ThreshBinary .

Image 7. Action of the Threshold parameter by ThreshBinaryInv operation

Read more on the subject:

Multifocus tool
Sub background filter
Pseudocolor filter
Sobel filter
Laplace filter
Threshold of color image filter
Adjust histogram
Configured find contours
Inpaint image by mask filter
Inpaint black pixels in image filter


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