Shading compensation circuit and control method thereof,申请号US20060505836-传众专利搜索

Shading compensation circuit and control method thereof

申请公布号：US7760394(B2)

申请号：US20060505836

申请日期：2006.08.18

申请公布日期：2010.07.20

申请人：

FUJITSU SEMICONDUCTOR LIMITED

发明人：OHARA KUNIHIRO

分类号：H04N1/40;G06T5/00;H04N1/401

主分类号：H04N1/40

摘要：A shading compensation circuit is provided which is capable of storing correction coefficients for shading compensation having optimal bit lengths, so that the data size of the correction coefficients can be reduced. The shading compensation circuit 10 for correcting the shading properties with respect to a horizontal direction and a vertical direction, has horizontal correction coefficient HHK and vertical correction coefficient VHK each having a bit length optimized according to a horizontal direction counter value HCT or a vertical direction counter value VCT. The horizontal and vertical correction coefficients HHK, VHK for the periphery of the image data are longer in bit length than the correction coefficients HHK, VHK for the center of the image data.