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EP0627696A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Image motion vector detection apparatus

Assignee: Panasonic Holdings Corp
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Filing: 1994-06-03
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Granted: —
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Expires: 2014-06-03
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Abstract

Abstract In a motion vector detecting apparatus, an input video signal is subsampled by a subsampling circuit, sampled data are Fourier-transformed by a discrete Fourier transform circuit to frequency area data, data for the previous frame, which is stored by a memory, data of the current frequency area are divided by a divider, a quotient is then inverse Fourier-transformed by an inverse discrete Fourier transform means and reflected to the real-time area, and, using the information from this real-time area, a first judging circuit determines whether there are any motion vectors, and if there are determines the magnitude and direction of the vectors.

Inventors

  • 👤 Toshiroh Nishio
  • 👤 Masashi Kubota
  • 👤 Seiji Nakai
  • 👤 Hidekazu Suzuki
  • 👤 Koji Setoh

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-08 09:55
CPC Classifications
G; G06; G06T; G06T7/00; G06T7/20; G06T7/262

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 91 words
A motion vector detection apparatus comprising a subsampling means for time-base sampling an input video signal, a discrete Fourier transform means for Fourier transforming subsampled data, a storage means for temporarily storing Fourier transformed data, a divider for dividing the data Fourier transformed by the discrete Fourier transform means and the data temporarily stored by the storage means, an inverse discrete Fourier transform means for inverse Fourier transforming the divider output, and a first evaluation means for detecting a motion vector from the output of the inverse discrete Fourier transform means.
Claim 2
Dependent Claim 69 words
The motion vector detection apparatus according to Claim 1 further comprising a low frequency pass means for passing only low frequency components of the input video signal and blocking the high frequency component, and wherein the input video signal is input to the low frequency pass means before being input to the subsampling means, and the output of the low frequency pass means is input to the subsampling means.
Claim 3
Dependent Claim 56 words
The motion vector detection apparatus according to Claim 1 or 2 further comprising an absolute value calculation means for calculating an absolute value of the divider output, and a second evaluation means for detecting a motion vector from an output of the absolute value calculation means and an output of the inverse discrete Fourier transform means.
Claim 4
Dependent Claim 58 words
The motion vector detection apparatus according to Claim 3 comprising a difference calculation means for calculating the difference of the storage means output and the discrete Fourier transform means output, and a third evaluation means for detecting a motion vector from an output of the difference calculation means and an output of the inverse discrete Fourier transform means.

References Cited (Backward Citations)

EP0368747A1 Cited

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