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Recording method and apparatus for conserving space on recording medium of security system

  • US 5,986,695 A
  • Filed: 07/28/1997
  • Issued: 11/16/1999
  • Est. Priority Date: 07/27/1996
  • Status: Expired due to Fees
First Claim
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1. A recording method for conserving space on a recording medium of a security system comprising the steps of:

  • detecting a motion amount from an image picked up by a camera, while recording the image on the recording medium;

    comparing the motion amount to a predetermined threshold, and increasing a counted value when the motion amount does not exceed the predetermined threshold, and alternatively resetting the counted value when the motion amount exceeds the predetermined threshold; and

    comparing the counted value to a reference value, and rewinding the recording medium back for re-recording until the counted value becomes zero when the counted value exceeds the reference value, and alternatively returning to detection of the motion amount from the image picked up by the camera when the counted value does not exceed the reference value.

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