| 摘要 |
<p>A variable color print (10) of an image (12) including an image medium (27) having a plurality of differently orientated local image regions (14, 16, 18, 20). Each region includes a number of periodic variations (22, 24, 26) in an optical characteristic of the medium (27) which extend substantially in a first direction within that region and are generally parallel to each other in a second direction transverse to the first direction. Each region further includes a number of periodic variations (28) in color which extend in the first direction and are generally parallel to each other in the second direction and are generally aligned with the periodic optical variations (22, 24, 26) in that region. The periodic optical variations (22, 24, 26) selectively prevent viewing of one or more of the color variations (28) at different viewing angles to generate changes in color of the viewed image as the viewing angle changes. A method of forming such a variable color print is also disclosed.</p> |
