While this is a useful image, it isn't of course how the machine knits.

Slideshows can contain still images and video clips; useful with current digital cameras.

But heat pictures are usually good enough to produce useful images.

The flypaper analogy is a useful image to illustrate the stickiness mechanism.

This produces an upright image, useful for terrestrial observations.

But it makes use of the sea surface and floor as guides to constrain the sound waves so they can produce useful images at long range.

The Livingetc gallery has over 500 images, useful for researching and inspiring a decoration project.

"The permanent loan, if you please, of a useful image, A handy memento, to take away the gloom."

Even in rapid movement the camera was steady enough to create a useful image, every dozen frames or so.

The programming languages weren't familiar to us, so we've only had success producing readable copy and useful images for about six months.