公开(公告)号：US5592218A

公开(公告)日：1997-01-07

申请号：US450575

申请日：1995-05-25

申请人： Toru Ochiai ,  Hidehisa Tsuchihashi ,  Soichi Ueta

发明人： Toru Ochiai ,  Hidehisa Tsuchihashi ,  Soichi Ueta

IPC分类号： H04N5/253 ,  H04N1/04 ,  H04N1/401 ,  H04N1/48 ,  H04N1/60

CPC分类号： H04N1/484 ,  H04N1/401

摘要： An image reading apparatus for reading an image on film which uses a shading correction coefficient computation unit for obtaining a shading correction coefficient in order to correct irregularities in image signals of a photoelectric conversion unit, and a quantity of light ratio measurement unit for obtaining the ratio of the quantity of light of each emission color in order to equalize the quantity of light emitted by a light emission unit. The shading correction coefficient and the quantity of light ratio are obtained immediately before reading of a first original medium, and additional original mediums can then be read using the correction coefficients obtained for the first original. Alternately, the shading correction coefficient and the quantity of light ratio can be obtained immediately before reading each original medium.

摘要翻译： 一种用于读取胶片上的图像的图像读取装置，该图像读取装置使用用于获得遮蔽校正系数的阴影校正系数计算单元，以校正光电转换单元的图像信号的不规则性，以及用于获得比率的光量测量单元的量 的发光颜色的光量，以均衡发光单元发出的光量。 在读取第一原始介质之前立即获得阴影校正系数和光量比，然后可以使用为第一原稿获得的校正系数来读取附加的原始介质。 或者，可以在读取每个原始介质之前立即获得阴影校正系数和光量比。