CONVERSION SYSTEM OF VISUAL CHARACTERISTIC TO BLOCK ORTHOGONAL TRANSFORMATION AREA

• Main Authors: GO YUKIO, YAMADA YOICHI
• Format: Patent
• Language: English
• Published: 22.04.1994
• Edition: 5
• Subjects: BASIC ELECTRONIC CIRCUITRY; CALCULATING; CODE CONVERSION IN GENERAL; CODING; COMPUTING; COUNTING; DECODING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION

PURPOSE:To obtain the conversion system in which a space impulse response by visual characteristic is not reflected to one block and the visual characteristic is accurately converted. CONSTITUTION:A space area expansion means 1 expands a space area having a space impulse of MXN block size into an area of mMXnN so that no reflection takes place in the space impulse response. A DFT(discrete Fourier transformation) means 2 transforms the space impulse in the expanded area into a space frequency area. A visual characteristic addition means 3 uses a visual characteristic table to provide a visual characteristic in the space frequency area and the result is inverted to the space area by an IDFT(inverse discrete Fourier transformation) means 4. After the space impulse response is converted into a block orthogonal conversion area by a block orthogonal transformation means 5, norm of the same component of each block is obtained. On the other hand, the inputted space impulse is subject to orthogonal transformation and each component absolute value is obtained. The ratio of the norm to the absolute value is outputted as the visual characteristic in the block orthogonal transformation area.