公开(公告)号：US20030231248A1

公开(公告)日：2003-12-18

申请号：US10461772

申请日：2003-06-13

Applicant: Casio Computer Co., Ltd.

Inventor： Masami Yuyama ,  Noriyasu Murata

IPC: H04N005/235

CPC classification number: H04N9/735

Abstract: An electronic camera comprises first and second gain adjusting circuits as well as a gain value storing section including a first gain value table storing gain values set in an R and B amplifiers of a first gain adjusting circuit when auto white balance control is executed, and a second gain value table storing gain values set in an R and B amplifiers of a second gain adjusting circuit when auto white balance control is executed, wherein the gain values from the second gain value table are sequentially set in the second gain adjusting circuit to detect white portions, and, on the basis of the results of the detection, a gain value to be set in the first gain adjusting circuit is selected from the first gain value table, whereby the gain value is set in the first gain value adjusting circuit to obtain an image that maintains white balance.

Abstract translation: 电子照相机包括第一和第二增益调整电路以及增益值存储部分，其包括第一增益值表，其存储当执行自动白平衡控制时在第一增益调整电路的R和B放大器中设置的增益值;以及 存储当执行自动白平衡控制时在第二增益调整电路的R和B放大器中设置的增益值的第二增益值表，其中来自第二增益值表的增益值被依次设置在第二增益调整电路中以检测白色 部分，并且基于检测结果，从第一增益值表中选择要在第一增益调整电路中设置的增益值，由此在第一增益值调整电路中设置增益值以获得 保持白平衡的图像。

公开(公告)号：US20040196393A1

公开(公告)日：2004-10-07

申请号：US10832125

申请日：2004-04-26

Applicant: CASIO COMPUTER CO., LTD.

Inventor： Hiroyuki Nakata ,  Noriyasu Murata

IPC: H04N005/217

CPC classification number: H04N9/045 ,  H04N5/361

Abstract: In a camera having a gamma-correction circuit on an output signal processing path of a CCD, an incident light path leading to the CCD is kept opening in a state where nonlinear gamma-correction processing in the gamma-correction processing circuit is prohibited, first image data (CCD output data; DATA1) are generated based on electric signal output from the CCD, incident light path leading to the CCD is kept closing, second image data (CCD output data; DATA2) are generated based on electric signal output from the CCD and lastly, the second image data DATA2 are subtracted from the first image data DATA1, thereby correcting to eliminate dark voltage component included in the first image data DATA1.