JP2007018070A5 - - Google Patents

Claims (6)

  Image analysis means for acquiring a frequency component of pixel density of a digital image acquired from a camera;
Visual environment determination means for determining the visibility level of the acquired frequency component;
  An output means for outputting the visibility level determined by the visual environment determination means as visual environment information;
  The visual environment determining means determines the visibility level, assuming that the visibility is better when the distribution of the frequency components is more complicated, and that the visibility is worse when the distribution of the frequency components is simpler. A visual environment information generation apparatus characterized by performing.   The visual environment information generation apparatus according to claim 1, wherein the visual environment determination unit determines a visibility level using a frequency component obtained by removing the influence of ambient illuminance from the frequency component acquired by the image analysis unit.   The visual environment information generation device according to claim 1, further comprising distribution means for distributing the output visual environment information in association with the installation position information of the camera.   With multiple cameras installed outdoors,
  Image analysis means for acquiring the frequency components of pixel density of digital images acquired from the plurality of cameras,
  Visual environment determination means for determining the visibility levels of the acquired plurality of frequency components,
  Output means for outputting a plurality of the visibility levels determined by the visual environment determination means as visual environment information;
  Distribution means for delivering the plurality of output visual environment information in association with the installation position information of the camera;
  The visual environment determining means determines the visibility level, assuming that the visibility is better when the distribution of the frequency components is more complicated, and that the visibility is worse when the distribution of the frequency components is simpler. Visual environment information distribution system characterized by performing.   The visual environment information distribution system according to claim 4, wherein the visual environment determination unit determines the visibility level using a frequency component obtained by removing the influence of ambient illuminance from the frequency component acquired by the image analysis unit.   The visual environment information distribution system according to claim 4 or 5, wherein the distribution means is a road traffic information communication system, a dedicated narrow area communication, a mobile phone network, or the Internet.