While I try to scan a sequence of about 13-14 images using an automatic turn table, it was observed that the patterns projected by the projector changes unexpetedly to a different one, following which the resulting scan is bad. The pattern goes back to what it was earlier and some scans turn out good. But as few scans are not correct the resulting fusion is quite bad. So we end up scanning each image manually and checking each image at the end of it. Can someone help me find a solution to this please? Why does the shape of patterns change suddenly?