| 摘要 |
<p>The number of dots per inch or resolution may be specified within an image on a document or within a postal indicia and later checked to determine if the image or document or the postal indicia has the correct resolution. The foregoing is accomplished by specifying that the image on the substrate (14) will be printed with n plus m dots per inch; rotating an ink jet head (11) having n nozzles per inch about an axis (13) parallel to a substrate by an angle theta so that the ink jet head will produce an image on the substrate having (n/cos theta) dots per inch; storing in a data center that the specified image will be printed with (n/cos theta) dots per inch; analyzing the image to determine if the image has (n/cos theta) dots per inch; and comparing the number of dots per inch in the analyzed image with the number of dots per inch stored for the specified image to determine if they have the same number of dots per inch.</p> |
