Image fluctuation correction

• US 5,796,427 A
• Filed: 12/19/1995
• Issued: 08/18/1998
• Est. Priority Date: 12/28/1994
• Status: Expired due to Fees

• Current Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Original Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Inventors: Suzuki, Fuminori
• Primary Examiner(s): GARBER, WENDY RAE
• Application Number:
  US08/574,798
• Time in Patent Office: 973 Days
• Field of Search: 348/208, 348/231, 348/207
• US Class Current: 348/208.6
• CPC Class Codes: H04N 23/68 for stable pick-up of the scene, e.g. compensating for camera body vibrations
• CPC Class Codes: H04N 23/6811 based on the image signal
• CPC Class Codes: H04N 23/683 performed by a processor, e.g. controlling the readout of an image memory
• CPC Class Codes: H04N 5/144 Movement detection for video coding H04N19/503; analysis of motion in general G06T7/20

Abstract

An apparatus for correcting image fluctuation which does not deteriorate quality of an image even when performing compensation of a fluctuation is provided with a first memory 13 for storing an image information Di which represents an image and is generated on the basis of the image signal Sin, a second memory 14 for storing an image information D1 read from the first memory 13, a fluctuation detector 16 for detecting a fluctuation of an image pickup device, a memory controller 17 for controlling writing and reading of the first and second memories 13 and 14, and a rewrite control circuit 18 for identifying a common area contained in the image represented by the image information D1 of the first memory 13 on the basis of an image represented by an image information D2 of the second memory 14 and rewriting the image information of the second memory 14 corresponding to the common area with the image information D1 of the first memory corresponding to the common area, in case that the fluctuation detector 16 has detected a fluctuation.

Claims

1. An apparatus for correcting image fluctuation for stopping a fluctuation of an image represented by an image signal output from an image pickup device, the image fluctuation corresponding to the fluctuation of said image pickup device, characterized by comprising:

a first memory for storing image information representing an image and generated on the basis of said image signal;

a second memory for storing said image information read from said first memory;

a fluctuation detector for detecting a fluctuation of said image pickup device;

a memory controller for controlling writing and reading of said first and second memories; and

a rewrite control means for identifying a common area contained in an image represented by said image information of said first memory on the basis of an image represented by said image information of said second memory, and rewriting the image information of said second memory corresponding to said common area with the image information of said first memory corresponding to said common area, in case that said fluctuation detector has detected a fluctuation.

3. A camera comprising an image pickup device and an image fluctuation correcting apparatus as claimed in claim 1.

2. A method of correcting image fluctuation for stopping a fluctuation of an image represented by an image signal output from an image pickup device, the image fluctuation corresponding to the fluctuation of said image pickup device, characterized by comprising the steps of:

storing image information representing an image and generated on the basis of said image signal into a first memory;

storing said image information read from said first memory into a second memory;

detecting a fluctuation of said image pickup device;

identifying a common area contained in an image represented by said image information of said first memory on the basis of an image represented by said image information of said second memory; and

rewriting the image information of said second memory corresponding to said common area with the image information of said first memory corresponding to said common area, in case that a fluctuation has been detected.