Content-based multimedia retrieval method
First Claim
Patent Images
1. A content-based multimedia retrieval method, comprising the steps of:
- extracting color distortion information from multimedia data;
setting weight of a descriptor used in the content-based multimedia retrieval using the extracted color distortion information; and
retrieving multimedia data applying the weight.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed is a content-based multimedia data retrieval method. The method according to the present invention comprises the steps of extracting color distortion information from multimedia data, setting weight of color-based descriptors on the basis of the extracted color distortion information, and extracting a distortion sensitivity by differently applying the weight according to the color distortion information. The method according to the present invention can improve a multimedia data retrieval performance and solve a problem of color distortion due to a different illumination or characteristics of a device.
23 Citations
25 Claims
-
1. A content-based multimedia retrieval method, comprising the steps of:
-
extracting color distortion information from multimedia data;
setting weight of a descriptor used in the content-based multimedia retrieval using the extracted color distortion information; and
retrieving multimedia data applying the weight. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A color distortion information extracting method, comprising the steps of:
-
dividing an image into partial regions of N×
M;
calculating, with respect to all divided partial regions, average hue values of pixels that their chroma is lower than a predetermined threshold for each partial region, and variance of hue values of pixels applied to the average hue values; and
re-averaging the average hue values obtained in each partial region with respect to the partial regions in which the calculated variance is lower than the predetermined threshold. - View Dependent Claims (19, 20)
-
-
21. A distortion sensitivity extracting method, comprising the steps of:
-
calculating a similarity based on a descriptor or an element of the descriptor with respect to the same image data in a data sample group that a color distortion does not occur and in a data sample group that the color distortion occurs;
obtaining an average value of the calculated similarities; and
determining a distortion sensitivity in inverse proportion to the average similarity.
-
-
22. In a content-based multimedia data retrieval using a descriptor such as a color histogram of image, a multimedia data information generating method, comprising the steps of:
-
generating a descriptor group having one or more descriptors used in the multimedia data retrieval; and
extracting color distortion information from the multimedia data, automatically setting weight of the descriptor group according to the extracted color distortion information, and generating color distortion information for retrieving the multimedia data. - View Dependent Claims (23, 24, 25)
-
Specification