JP2004070427A5

JP2004070427A5 -

Info

Publication number: JP2004070427A5
Application number: JP2002225148A
Authority: JP
Filing date: 2002-08-01
Publication date: 2005-10-27
Anticipated expiration: 2022-08-01

Claims

In an important image detection device for detecting an important image included in a video,
Color information acquisition means for acquiring color information from the input image;
Artificial image determination means for determining whether the input image is an artificial image based on the color information;
Character information extracting means for extracting character information of an image determined to be an artificial image;
An important image extraction apparatus comprising: a determination unit that determines whether or not the image is an important image from a combination of a background color and a character color of the image from which the character information is extracted.

Still image extraction means for extracting an image including a still image portion having a still period of a predetermined period or more from the video,
The important image extraction apparatus according to claim 1, wherein the still image extraction unit supplies an image including the extracted still image portion as the input image to the color information acquisition unit.

The important image extraction apparatus according to claim 2, wherein the determination unit determines the importance level from a background color and a character color of the image from which the character information is extracted, and a still period.

The still image extracting means counts the number of frames in which a difference value between temporally consecutive frame images is equal to or smaller than a predetermined threshold, and when the count value is equal to or larger than a predetermined threshold, the input image includes a still image. The important image extracting apparatus according to claim 2, wherein the important image extracting apparatus determines that the image is an image.

An importance table that records the importance determined in advance by a combination of the background color and the character color of the image;
The important image extraction apparatus according to claim 1, wherein the determination unit determines whether the image is an important image based on the importance obtained by referring to the importance table.

2. The important image extraction apparatus according to claim 1, further comprising display control means connected to the display means for controlling to display only images determined to be important images by the determination means.

The important image extraction apparatus according to claim 1, wherein the color information acquisition unit calculates at least one histogram of color information indicating luminance, brightness, saturation, and hue of an image.

In an important image detection method for detecting an important image included in a video,
A color information acquisition step of acquiring color information from the input image;
An artificial image determination step of determining whether the input image is an artificial image based on the color information;
A character information extraction step of extracting character information of an image determined to be an artificial image;
A determination step of determining whether or not the image is an important image from a combination of a background color and a character color of the image from which the character information is extracted.

In a program for causing a computer to execute an operation for detecting an important image included in a video,
A color information acquisition step of acquiring color information from the input image;
An artificial image determination step of determining whether the input image is an artificial image based on the color information;
A character information extraction step of extracting character information of an image determined to be an artificial image;
A determination step of determining whether the image is an important image from a combination of a background color and a character color of the image from which the character information is extracted.

In a computer-readable recording medium recorded with a program for causing a computer to execute an operation of detecting an important image included in a video,
A color information acquisition step of acquiring color information from the input image;
An artificial image determination step of determining whether the input image is an artificial image based on the color information;
A character information extraction step of extracting character information of an image determined to be an artificial image;
And a determination step of determining whether the image is an important image from a combination of a background color and a character color of the image from which the character information is extracted. A recording medium on which a program is recorded.

In an important image detection system for detecting an important image included in a video,
One or more display devices;
Color information acquisition means for acquiring color information from the input image, artificial image determination means for determining whether the input image is an artificial image based on the color information, and characters of the image determined to be an artificial image A character information extracting means for extracting information; a determining means for determining whether the character information is an important image from a combination of a background color and a character color of the image from which the character information is extracted; and the display device, An important image detection system comprising: an important image extraction device including display control means for controlling to display only an image determined to be an important image by the determination means.

12. The important image detection system according to claim 11, further comprising a recording device for recording the important image extracted by the important image extraction device.