PROBLEM TO BE SOLVED: To provide a method for constituting a color space quantization descriptor information structure which performs quantization sufficiently reflecting characteristics of a color space to perform multimedia retrieval on the basis of contents when using color information as feature information on multimedia to retrieve multimedia data of a dynamic image or a static image. SOLUTION: When multimedia on the base of contents are retrieved, color space quantization descriptor information which quantizes the color space is divided into higher color spaces and lower color spaces in many stages and is inductively changed into a tree structure having plural lower color spaces.
METHOD FOR CONSTITUTING COLOR SPACE QUANTIZATION DESCRIPTOR INFORMATION STRUCTURE