There's no such feature built-in ClipCoverage yet. But no worry, there's a workaround thanks to the Google Slides integration. Here're the steps:
1) Open your report in Google Slides and save it as .odp (OpenOffice Impress format). If it doesn't work, you can first download it as .pptx and then use PowerPoint to save it as .odp.
2) The .odp file is essentially a .zip file. Change the file extension to .zip and open it with any programs you might have that handles .zip files. You will find all the images within the report in a folder called media.