That's a very open question.
What do you mean by images? Are they photographs/images or drawings? Are the drawings editable and created in InDesign or are they behaving like a images that you can move around the page?
When you go to Window>Info and select an image/drawing/photograph does it give any information?
If you go to Window>Links does the image get highlighted in the Links Panel?
What way do you want to save your images from InDesign? Are you looking to convert them or simply use them for another purpose?
What is your end goal here?