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26 records (took 0.017 seconds)

    12.
    发明专利
    未知

    公开(公告)号：DE3484736D1

    公开(公告)日：1991-07-25

    申请号：DE3484736

    申请日：1984-12-11

    Applicant: IBM

    Inventor： ANDERSON KAREN LOUISE ,  MINTZER FREDERICK COLE ,  GOERTZEL GERALD ,  MITCHELL JOAN LA VERNE

    IPC: G06T3/60 ,  G06F15/62

    Abstract: Method for rotating an image by 90 degrees includes the steps of: storing the image in a raster format arranged in r rows by c columns, image information in each row being stored in a number of bytes, each byte having b bits, there being c/b bytes in each row of the raster format; moving a block of the image into a temporary storage, there being n rows by m columns in the block; separating each image block into groups of bytes of rotatable size; determining for each group if all bits are the same value; rotating each group that does not have all bits the same value; storing each rotated group in an output area of the raster storage; repeating the above steps for all remaining blocks of the image.

    13.
    发明专利
    未知

    公开(公告)号：DE3674943D1

    公开(公告)日：1990-11-22

    申请号：DE3674943

    申请日：1986-02-28

    Applicant: IBM

    Inventor： GOERTZEL GERALD ,  THOMPSON GERHARD ROBERT

    IPC: G06F3/12 ,  B41J2/52 ,  G06K15/10 ,  H04N1/40 ,  H04N1/405 ,  H04N1/411

    Abstract: A system for producing improved halftone images from continuous tone input images,the pixels of which have been digitized as gray scale values, using a printer having the capability to print a set of output pel patterns producing a respective set of discrete gray scale values, is disclosed. Blocks of pel patterns with discrete gray scale values approximating the gray scale values of the input pixels are selected for printing, and the error in a first block due to the difference between the gray scale value associated with the block and the gray scale value of the corresponding input pixel, is determined. To diffuse this error it is distributed to at least two adjacent blocks using a random number generator to determine the distribution such that a random fraction of said error is distributed to one block and the remainder is distributed to the other block. This error diffusion process is carried through the adjacent blocks taking into account the error fraction already assigned. For edge enhancement the brightness gradient surrounding each input pixel is determined and a threshold value is set below which said gradient is classified as small and above which it is classified as large. When said gradient is small, the selected discrete pattern is printed for the pixel, and when said gradient is large, the pel pattern is altered and the block representing the pixel is printed biasing the pels therein toward the darker input pixels.

    PARALLEL TONE DETECTOR
    15.
    发明专利
    PARALLEL TONE DETECTOR 未知

    公开(公告)号：CA940206A

    公开(公告)日：1974-01-15

    申请号：CA129325

    申请日：1971-12-06

    Applicant: IBM

    Inventor： ABRAMSON PAUL ,  GOERTZEL GERALD

    IPC: H04Q1/457

    Abstract: A parallel tone detection method, system and apparatus includes using several generators for providing square waves at the fundamental frequency of several parallel tones to be detected. An unknown input signal is clipped and then AND gates are used to test for the simultaneous presence of the A.C. polarities of both the unknown input signal and each respective square wave. A low-pass filter is connected to each of the outputs of the AND gates associated with each tone. The outputs of the filters for each tone are connected into a corresponding analogue OR gate, which is one of a series of analogue OR gates. Then it is determined whether the outputs of any of the analogue OR gates exceeds a standard value. If it does then a circuit determines which analogue OR gate produces the largest output to identify the tone received.

    SYMMETRICAL ADAPTIVE DATA COMPRESSION/DECOMPRESSION SYSTEM
    18.
    发明专利
    SYMMETRICAL ADAPTIVE DATA COMPRESSION/DECOMPRESSION SYSTEM 未知

    公开(公告)号：CA1222059A

    公开(公告)日：1987-05-19

    申请号：CA473965

    申请日：1985-02-08

    Applicant: IBM

    Inventor： GOERTZEL GERALD ,  MITCHELL JOAN L

    IPC: H03M7/40 ,  H03M7/30

    Abstract: Data compression for transfer (storage or communication) by a continuously adaptive probability decision model, closely approaches the compression entropy limit. Sender and receiver perform symmetrical compression/decompression of binary decision n according to probabilities calculated independently from the transfer sequence of 1...n-1 binary decisions. Sender and receiver dynamically adapt the model probabilities, as a cumulative function of previously presented decisions, for optimal compression/decompression.

    COMPLEX CHARACTER GENERATOR
    19.
    发明专利
    COMPLEX CHARACTER GENERATOR 未知

    公开(公告)号：CA1140679A

    公开(公告)日：1983-02-01

    申请号：CA364465

    申请日：1980-11-12

    Applicant: IBM

    Inventor： GOERTZEL GERALD ,  POWELL CARL G ,  TSENG SAMUEL C

    IPC: G09G5/28 ,  B41B19/01 ,  G06K15/10 ,  G06T11/20 ,  G09G5/24 ,  G06F3/12 ,  G09G3/20

    Abstract: COMPLEX CHARACTER GENERATOR A character compaction and generation method and apparatus which is particularly adapted to the generation of complex characters such as Kanji characters. A dot matrix defining a given character is compacted into a sparse matrix, with the original character being reconstructed for printing or display from the compacted character defined in the sparse matrix. Each character in the complex character set is compacted and stored in memory one time only, with decompaction being performed each time a given character is to be generated. A set of symbols are defined to represent different patterns which occur frequently in the entire complex character set. Different combinations of the symbols define a given character. The information stored for each sparse matrix representing a given character is comprised of each symbol in the sparse matrix, its position, and its size parameter if the symbol represents a family of patterns which differ only in size. Three groups of different patterns are defined which occur frequently in the complex character set, namely, a first group which has a fixed size for each pattern, a second group which has one size parameter which must be specified for each pattern, and a third group which has a plurality of size parameters which must be specified for each pattern. Certain ones of the characters have elements of different patterns which overlap, such that the character may be encoded utilizing less symbols, and accordingly less bytes of data. A given pattern may be generated at the same time another pattern is being decoded. YO978-010

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