Abstract: When the user directs to change the view point within a virtual 3-D coordinate space having thereon displayed reduced images as a list of data by successively inputting a view point moving in an arbitrary direction, a trace of the movement of the view point is displayed within the screen. Thus, it has become possible to visualize individual data files in the database and the relationship among each item of the data. Consequently, the user can readily manage the data and retrieve the information he needs.

Abstract: A purpose of the handwriting recognition device is to retrieve handwritten characters and symbols at high speed and easily. The stroke data input from the stroke data input part through handwritten input is subjected to the approximate reforming process and single-stroking process to prepare the single-stroke data. By subjecting the single-stroke data to the complex Fourier transform process, the Fourier coefficient is obtained and the number of strokes is obtained. During registration, the dictionary Fourier coefficient and the dictionary stroke number, and the dictionary stroke data are stored in the dictionary memory in relation to each other. During retrieval, the retrieval Fourier coefficient and the retrieval stroke number are stored temporarily in the temporary memory. Furthermore, the dictionary stroke data are narrowed down according to the result of the comparison of the stroke numbers, and the dictionary stroke data is determined according to the result of the comparison of the Fourier coefficient.