 Because each interlaced video frame is two fields captured at different moments in time, interlaced video frames can exhibit motion artifacts known as "interlacing effects", or "combing", if recorded objects move fast enough to be in different positions when each individual field is captured.These artifacts may be more visible when interlaced video is displayed at a slower speed than it was captured, or in still frames.While there are simple methods to produce somewhat satisfactory progressive frames from the interlaced image, for example by doubling the lines of one field and omitting the other (halving vertical resolution), or anti-aliasing the image in the vertical axis to hide some of the combing, there are sometimes methods of producing results far superior to these.