Abstract:
In an apparatus for judging a hand movement of an image, pixels where absolute values of differences between image data of respective pixels of blocks of a current frame and image data of representative point pixels of blocks of an earlier frame read out from a representative point memory satisfy a predetermined condition are judged by a condition judgment circuit to form a frequency distribution table corresponding to the judged result by a frequency distribution table formation circuit to calculate, on the basis of the frequency distribution table, the number of coordinates having a frequency value greater than a predetermined value in the vicinity of a coordinate designated by a motion vector of an image to judge the motion vector to result from a hand movement when the calculated value is less than a predetermined value.
Abstract:
139 sync blocks, each having 111 bytes, are disposed on each track of a magnetic tape. Among the 139 sync blocks, 121 sync blocks each consist of a two-byte detection pattern for detecting the sync block, three-byte identification information for identifying the sync block, 96-byte main data, and 10-byte inner error correcting code added to the identification information and the main data. In the remaining 18 sync blocks, instead of the main data, 96-byte outer error correcting code is included. The outer error correcting code is provided for each group of the 139 sync blocks. Such a group of 139 sync blocks is obtained by dividing 2224 sync blocks contained in sixteen tracks by sixteen planes, 1668 sync blocks contained in twelve tracks by twelve planes, or 1112 sync blocks contained in eight tracks by eight planes. The sync blocks are arranged on the magnetic tape so that the distance between the sync blocks belonging to the identical plane is constant among the planes.
Abstract:
139 sync blocks, each having 111 bytes, are disposed on each track of a magnetic tape. Among the 139 sync blocks, 121 sync blocks each consist of a two-byte detection pattern for detecting the sync block, three-byte identification information for identifying the sync block, 96-byte main data, and 10-byte inner error correcting code added to the identification information and the main data. In the remaining 18 sync blocks, instead of the main data, 96-byte outer error correcting code is included. The outer error correcting code is provided for each group of the 139 sync blocks. Such a group of 139 sync blocks is obtained by dividing 2224 sync blocks contained in sixteen tracks by sixteen planes, 1668 sync blocks contained in twelve tracks by twelve planes, or 1112 sync blocks contained in eight tracks by eight planes. The sync blocks are arranged on the magnetic tape so that the distance between the sync blocks belonging to the identical plane is constant among the planes.
Abstract:
In an apparatus for judging a hand movement of an image, pixels where absolute values of differences between image data of respective pixels of blocks of a current frame and image data of representative point pixels of blocks of an earlier frame read out from a representative point memory satisfy a predetermined condition are judged by a condition judgment circuit to form a frequency distribution table corresponding to the judged result by a frequency distribution table formation circuit to calculate, on the basis of the frequency distribution table, the number of coordinates having a frequency value greater than a predetermined value in the vicinity of a coordinate designated by a motion vector of an image to judge the motion vector to result from a hand movement when the calculated value is less than a predetermined value.
Abstract:
139 sync blocks, each having 111 bytes, are disposed on each track of a magnetic tape. Among the 139 sync blocks, 121 sync blocks each consist of a two-byte detection pattern for detecting the sync block, three-byte identification information for identifying the sync block, 96-byte main data, and 10-byte inner error correcting code added to the identification information and the main data. In the remaining 18 sync blocks, instead of the main data, 96-byte outer error correcting code is included. The outer error correcting code is provided for each group of the 139 sync blocks. Such a group of 139 sync blocks is obtained by dividing 2224 sync blocks contained in sixteen tracks by sixteen planes, 1668 sync blocks contained in twelve tracks by twelve planes, or 1112 sync blocks contained in eight tracks by eight planes. The sync blocks are arranged on the magnetic tape so that the distance between the sync blocks belonging to the identical plane is constant among the planes.
Abstract:
PROBLEM TO BE SOLVED: To enable a magnification chromatic aberration in a state where the center of a screen is deviated from the center of generation of aberrations to be easily and highly accurately corrected without imposing a burden on a user.SOLUTION: A center position deviation amount data table 250 created by imaging a chart image is prestored with a magnification chromatic aberration correction data table 240. The center position deviation amount data table 250 stores correction data corresponding to a combination of an aperture value, a zoom position and a focus position. A magnification chromatic aberration correction unit 210 calculates the coordinate of the aberration center in an image surface using center position deviation amount data stored in the center position deviation amount data table 250. Then, correction data is selected from the magnification chromatic aberration correction data table 240 according to an image height value calculated based on a radial distance from the coordinate of the aberration center to a processing target pixel, a magnification chromatic aberration correction amount is calculated, and correction is performed.
Abstract:
PURPOSE:To improve the picture quality degradation of the pictures of smooth patterns for which spatial density fluctuation is large by considering the visual frequency characteristics of humans as well and calculating an activity index. CONSTITUTION:Weighting coefficients corresponding to the visual frequency characteristics supplied to a second weighting circuit 20 are imparted to DCT coefficients from a DCT (discrete cosine transformation) circuit 2. Thereafter, it is supplied to an activity judging circuit 9 accompanying an activity index extraction processing. The weighting coefficients of the circuit 20 is defined so as to let activity be small in a low band part and to let the activity be larger in a higher band part both horizontally and vertically. Thus, even when the DCT coefficients with large power is present in the low band part, the activity in he low band part is weakened. Thus, a quantization step width becomes narrower and the picture quality degradation for the pictures of the smooth patterns for which the spatial density fluctuation is large can be substantially improved.
Abstract:
PURPOSE:To make deterioration in picture quality in a block shape unremarkable at high speed search. CONSTITUTION:Video data DVi from an error correction circuit 25 are tentatively stored in a memory 2. A discrimination circuit 3 uses each block of a reproduced video signal as a noticed block sequentially and compares a brightness level of a picture element signal at a border between a noticed block and a surrounding block to discriminate the matching. A calculation circuit 4 uses each block of the reproduced video signal as a noticed block sequentially and calculates a difference between a mean brightness level of a picture element signal of the surrounding block and a mean brightness level of a picture element of the noted block as an offset DELTAL. A matching circuit 6 adds the offset DELTAL to the data DVi outputted from the memory 2 to form data DVi'. In the block without matching at high speed search, a changeover switch 5 is thrown to the position (b) and the data DVi' in which the brightness level difference from the surrounding block are fed to a D/A converter 26.