| 摘要 |
<p>The present invention relates to an image reader, such as a color image scanner, which can enhance outline of shapes that occur in an original image 2. The image reader in accordance with the present invention comprises a main-aperture board set 102 at a location on which lights from a light source which are reflected by or pass through the original image 2 and then pass through a lens 8, are focused. A transmission part 104 of the main-aperture set 102 comprises a first transmission part 108 and a second transmission part 110, which is adjacent to the first transmission part 108, the first transmission part 108 being used to transmit lights corresponding to all of the center part of a small area of the original image 2, the second transmission part 110 being used to transmit some of the lights corresponding to the rest of said small area with the quantity of said transmitted lights decreasing according to the increased distance from center C of the first transmission part 108. Therefore, graininess in the original image 2 is offset to substantially decrease its effect. As a result, the possibility of graininess reading, reproduction or enhancement is reduced without worsening a good reading resolution. <IMAGE></p> |
