The Image control is a wrapper around the HTML tag for graphics. There are two main scenarios how the Image control is used:
As a visually appealing clickable area in the form of an image button, or as a purely decorative element.
In the second case, images are not pre-defined as tab stops in accessibility mode.
Whether or not an image is decorative
can be configured with the property of the same name.
This image is in the tab chain and screenreaders understand that the content represents relevant information which needs to be announced.
This image is purly decorative and will be ignored by screenreaders.