10. An apparatus for retrieving images comprising: a knowledge database for assisting inference for obtaining a new visual impression from a plurality of visual impressions; an image database in which image data and natural language data indicating a plurality of visual impressions of an image prepared based on the image data are correlated to each other and stored in the correlated form; a natural language input section for inputting natural language data indicating a text for retrieval; an inferring section for obtaining a new visual impression corresponding to a visual impression of natural language data inputted using said natural language input section from a plurality of visual impressions by referring to said knowledge database for each natural language data stored in said image database; and a retrieving section for extracting image data relating to the natural language data from said image database when there exists natural language data of which a new visual impression can be obtained with said inferring section among natural language data stored in said image database.
10. An apparatus for retrieving images comprising: a knowledge database for assisting inference for obtaining a new visual impression from a plurality of visual impressions; an image database in which image data and natural language data indicating a plurality of visual impressions of an image prepared based on the image data are correlated to each other and stored in the correlated form; a natural language input section for inputting natural language data indicating a text for retrieval; an inferring section for obtaining a new visual impression corresponding to a visual impression of natural language data inputted using said natural language input section from a plurality of visual impressions by referring to said knowledge database for each natural language data stored in said image database; and a retrieving section for extracting image data relating to the natural language data from said image database when there exists natural language data of which a new visual impression can be obtained with said inferring section among natural language data stored in said image database. 11. An apparatus for retrieving images according to claim 10; wherein said inferring section executes inference after linguistic analysis of natural language data stored in said image database as well as of inputted natural language data inputted from said natural language input section.