Example - How to Make an Image Background Transparent (PNG with Alpha Channel).

This describes how to make an image background transparent using collage making software or photo montage program. We will cut the object out from its background and save it as png with alpha channel.

We want to make the transparent background for this puppy.

The image for making the transparent background

Photo © Andrey Kravtsov

Select tool Separation.
Set Mode - Full.
Set Area Selection - Object.
Roughly mark the object. Make the mark line closed for further filling.

Set Area Selection - Background.
Roughly mark the background. Make the mark line closed.

Roughly marked object and its background

Press Actions - Fill.
Set Area Selection - Object.
Click inside the object in order to fill it. Filling is necessary only for separation acceleration, especially on big photos.

Repeat filling for the background.

Press Actions - Separate.
Zoom in the picture to have a good look at separation imperfections.

Preliminary separation of the object from the background by the software

The increased fragment of separation of object and background

Define the object and its background more precisely near the imperfection places.
Press Actions - Separate - separation becomes more accurate.

More accurate definition of the object by the user

More precise separation of the object from the background by the software

Move to the next border area. Define the object and its background more precisely.
Press Actions - Separate.

More accurate definition of the object and its background by the user

Define the object and its background more precisely around a tail.

Define the object and its background more precisely at the last part of the image.

The object and its background are separated precisely.
Press Mode - Effect.

The object and its background are separated precisely

Press Actions - Store.
Press Actions - Done.
Select tool Paste Object.
Press Export and save the object as png with transparent background (alpfa channel).

Exported to png image with transparent background (alpha channel)

The part of this example (up to clearing the background) can be performed using free versions of the software - Image Resize Guide Lite and Photo Montage Guide Lite.