Flicker detecting method and flicker detecting apparatus
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsShinji Yamamoto, Toshiyuki Nakashima, Katsumi Tokuyama
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Abstract
A flicker detecting apparatus has integrating means for integrating a pixel level every line in one frame or one field of a video to calculate a line lightness value, extracting means for extracting a fluctuation cycle in a vertical scanning direction of the line lightness value, and deciding means for deciding that a flicker is present when the fluctuation cycle is within a predetermined frequency range. The extracting means calculates a difference made by a fluctuation in the vertical scanning direction of the line lightness value every line, counts the number of continuations of an identical code in the difference, and calculates the count value as fluctuation cycle.
Claims28
A flicker detecting method comprising the steps of:
- calculating a lightness value for each of at least two lines in a frame or a field of a video;
- and
- comparing the lightness value of at least two of said at least two lines.
A flicker detecting apparatus comprising:
- calculating means for calculating a lightness value for each of at least two lines in a frame or a field of a video;
- and
- comparing means for comparing the lightness value of at least two of said at least two lines.
Dependencies are inferred from the claim text.