专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JP2004086747A Method for measuring distortion aberration and image processing device 审中-公开
公开(公告)号：JP2004086747A
公开(公告)日：2004-03-18
申请号：JP2002249340
申请日：2002-08-28
申请人： Chinon Ind Inc , チノン株式会社
发明人： FURUTA HARUKI
IPC分类号： G06T3/00 , G06T7/60 , H04N5/232
摘要： PROBLEM TO BE SOLVED: To estimate distortion aberration from picture data and to correct the distortion aberration. SOLUTION: Photographed picture data are processed by edge extraction processing and thinning processing to obtain many segments. Respective segments are identified and the distortion aberration coefficient of each segment is calculated while supposing that a part of a straight line of each segment is distorted. These distortion aberration coefficients are statistically processed to estimate a distortion correction coefficient. Projection conversion processing is applied to the picture data by using the distortion correction coefficient to obtain corrected picture data. Even in the case of the picture data of a general natural image in which the characteristics of a photographing lens 21 are unknown, the distortion aberration of the picture data can be corrected. COPYRIGHT: (C)2004,JPO

2. 发明专利

JPH09187019A IMAGE PICKUP DEVICE 失效
公开(公告)号：JPH09187019A
公开(公告)日：1997-07-15
申请号：JP27196
申请日：1996-01-05
申请人： CHINON IND INC
发明人： NAKAMURA HIDEO , FURUTA HARUKI
IPC分类号： H04N9/04 , H04N9/07 , H04N9/73
摘要： PROBLEM TO BE SOLVED: To provide the image pickup device with excellent color reproducibility without the need for a complicated circuit. SOLUTION: A sum picture element signal SCCD outputted from a color image pickup element 100 is converted into sum picture element data DCCD by a sample-and-hold circuit 102 and an A/D converter 104 and the data DCCD are stored in a frame memory 106 in the case of image pickup. An arithmetic section 108 executes an arithmetic processing program in a program memory 110 to read the sum picture element data DCCD in the frame memory 106, multiplies a prescribed white balance adjustment coefficient with each of picture element data and calculates color difference signals (B-Y), (R-Y) of a horizontal line. In order to interpolate the color difference signal as to deficient horizontal lines, the color difference signals (B-Y), (R-Y) are arithmetically averaged in a prescribed relation to form color difference signals of all the horizontal lines, then image reproduction with excellent color reproducibility is realized.

3. 发明专利

JPH06245140A EXPOSURE CONTROLLER AND IMAGE PICKUP DEVICE USING THE SAME 失效
公开(公告)号：JPH06245140A
公开(公告)日：1994-09-02
申请号：JP3038393
申请日：1993-02-19
申请人： CHINON IND INC
发明人： NAKAMURA HIDEO , FURUTA HARUKI
IPC分类号： H04N1/028 , H04N5/235
摘要： PURPOSE:To suppress flicker by providing a photoelectric conversion element, a comparator means converting a signal from the element into a binarized signal, and a timing control means taking a predetermined period from a point of time when the binarized signal is changed to the controller. CONSTITUTION:A detection signal Sp outputted from a photoelectric conversion element 5 is received by a comparator circuit 6 via an amplifier circuit. The circuit 6 generates a binarized signal SHL being logical H when an amplitude of a detection signal Sp' is larger than a reference voltage and a binarized signal SHL being logical L when the amplitude of the detection signal Sp' is smaller than the reference voltage and gives the signal to a timing control circuit 4. The circuit 4 applies an exposure start control signal SaBN used to command start of exposure synchronously with inversion of the signal SHL changed from logical L into logical H, an exposure end control signal SEN commanding end of exposure at a point of time when a predetermined exposure period tau0 elapses from the point of that time, and a scanning read control signal Sc used to make scanning read from the point of time of the end of exposure to a CCD solid-state image pickup device 1. Thus, even when an irregular illuminance change is in existence, an object with an optimum luminous intensity is always picked up.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式