The object Image tab is a core tab that can allow an image to be added to an object.
To have an object image the "Has Object Image" Checkbox on the object needs to be ticked and the object needs to built for this to take effect. See below:
When the object has been built there are some configuring that needs to take place. By default Object Editor Forms will display the Object Image tab If the object has Object Image allowed, To disable this tab click on "Form settings" and change "Hide Object Image Tab" to be True.
The Object Image Tab looks like the image below. If there is no image for the object that you are editing then the default "No Image Available" will be displayed. To upload an image click the "Upload" button, select an image from your computer then press save. This image can be used in columns as well as repeaters.