If the image is a standalone file, it must be uploaded as an Unstructured Document. Fluid Topics displays it as it does all types of Unstructured Documents, i.e. you have no preview in the Search Results page and can only view it in the Document Viewer page.
The following example shows standalone images in different formats in the Search Results page.
In the Search Results page, a standalone image is displayed with its title along with an icon indicating its format, e.g., Word, PDF, etc. Below the title, Fluid Topics displays the description of the image, if it was provided in the FluidTopicsControlFile.xml Control File.
For PDF files, if text is present in the image itself, it is displayed as a description, followed by the description defined in the Control File.
For other files, if information is retrieved from the image file, e.g., the creation date or the software used to create the file, it is displayed as a description, followed by the description defined in the Control File.
When clicking on the title, you can open the image file in the Document Viewer.