Title:
ELECTRONIC IMAGE PICKUP DEVICE
Document Type and Number:
Japanese Patent JPH08265654
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To improve the performance and efficiency of a device by improving a fact that a memory with a high capacity is required to store dark frames and a scanning time of an image sensor is very long in the case of correcting a black pattern due to a dark current. SOLUTION: An electronic image pickup device is provided, where a charge moving type image sensor 18 corrects a black pattern due to a dark current. The image sensor 18 acquires a reference dark frame in the dark and a dark frame pixel value. An exposure section adjusts an exposure time of a pickup light to provide corresponding exposure to pluralities of image frames. Thus, the image sensor 18 generates pluralities of corresponding image frames each having a frame pixel value. Then a processor 38 obtains a reference coefficient from the dark frame pixel value, applies it to the frame pixel value of pluralities of the image frames to obtain the corrected image frame pixel values where the black pattern is corrected. Since the one reference dark frame exposure is employed for the correction of the exposure of lots of the image frames, the performance and the efficiency of the device are enhanced.
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Inventors:
SUTEIIBUN DEE MAKURIIN
Application Number:
JP3398596A
Publication Date:
October 11, 1996
Filing Date:
February 21, 1996
Export Citation:
Assignee:
EASTMAN KODAK CO
International Classes:
H04N5/16; H04N5/361; H04N9/04; (IPC1-7): H04N5/335; H04N5/16
Attorney, Agent or Firm:
Kenji Yoshida (2 outside)