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    Character segmentation using pattern measurements, error rescan and adaptive font determination
    3.
    发明授权
    Character segmentation using pattern measurements, error rescan and adaptive font determination 失效
    使用模式测量，错误评估和自适应测定的字符分段

    公开(公告)号：US3694807A

    公开(公告)日：1972-09-26

    申请号：US3694807D

    申请日：1971-08-12

    Applicant: IBM

    Inventor： BOND MILTON F ,  SHATFORD JOHN F

    IPC: G06K9/34 ,  G06K9/68

    CPC classification number: G06K9/348 ,  G06K9/34 ,  G06K9/46 ,  G06K9/60 ,  G06K9/6807 ,  G06K2209/01

    Abstract: Several types of input pattern measurements are gated together to determine the point at which adjacent characters will be separated by a segmentation signal. One type of pattern is effective to segment the characters unless an inhibitory pattern has also been received. The second pattern type will segment the characters only after an initializing pattern has been received, but only if an inhibitory pattern has not been received. A third type of pattern is effective for segmentation only after the receipt of both an inhibitory pattern and a subsequent enabling pattern. The enabling pattern may also remove the effect of the inhibitory pattern upon some or all of the first two pattern types. When the pattern size exceeds a preset maximum width without having been segmented, all three pattern types are inhibited, the pattern is rescanned and segmented with a blank scan, and a forced segmentation is produced at predetermined points within the pattern. The pattern types for both segmentation and recognition purposes may be selected from a number of pattern subsets, each subset being identified with a character set in a particular font. The characters on a document are initially scanned using a general measurement set. The number of measurements belonging to a particular subset are then counted until a predetermined number of them has appeared. At this point, the measurement switch from the general set to the subset identified as the font which is being read.

    Abstract translation: 将几种类型的输入图案测量结合在一起以确定相邻字符将被分割信号分开的点。 一种类型的图案对于分割字符是有效的，除非还接收到抑制图案。 第二种模式类型只有在接收到初始化模式之后才会分割字符，但只有当没有接收到抑制模式时才会分割字符。 第三种类型的图案仅在接收到抑制图案和随后的使能模式之后才能进行分割。 启用模式还可以消除抑制模式对前两种模式类型中的一些或全部的影响。 当图案尺寸超过预设的最大宽度而没有被分割时，所有三种图案类型都被禁止，图案被重新扫描并用空白扫描分割，并且在图案中的预定点产生强制分割。 用于分割和识别目的的图案类型可以从多个图案子集中选择，每个子集用特定字体中的字符集标识。 最初使用一般测量集扫描文档上的字符。 然后计数属于特定子集的测量数，直到其出现预定数目。 此时，测量开关从一般设置到被识别为被读取的字体的子集。

    METHOD AND APPARATUS FOR RECOVERING PARITY PROTECTED DATA
    6.
    发明专利
    METHOD AND APPARATUS FOR RECOVERING PARITY PROTECTED DATA 未知

    公开(公告)号：CA2044521A1

    公开(公告)日：1991-12-22

    申请号：CA2044521

    申请日：1991-06-13

    Applicant: IBM

    Inventor： BOND MILTON F ,  CLARK BRIAN E ,  MCROBERTS RAYMOND S

    IPC: G06F3/06 ,  G06F11/10 ,  G11B20/18 ,  G06F12/00

    Abstract: A storage management mechanism resident on a storage controller maintains parity records on the storage units it services. The storage management mechanism includes a status map indicating, for each data block, the location of the corresponding parity block, and the status of the data block. If a single storage unit fails, the system continues to operate, and the storage management mechanism is placed in a failure operating mode. While in failure operating mode, the storage management mechanism checks the status map before accessing data on the failed storage unit. If the data has not yet been reconstructed, storage management first reconstructs the data in that block of storage by successively reading and accumulating an Exclusive-OR of the same blocks on all storage units in the parity group, including the parity block. The block of reconstructed data is stored in the location of the parity block, and the status map is updated to indicate that the block has been reconstructed. Once the data has been reconstructed, it is only necessary to read from or write to the former parity block directly. In the same manner, storage management will reconstruct a block of storage on the failed unit before writing to any corresponding block on a non-failed unit, if the block has not yet been reconstructed. In an alternate embodiment, spare areas of storage in the non-failing storage units are allocated to the reconstructed data. The total of these spare areas constitute a virtual spare storage unit. As data is reconstructed, it is placed in the virtual spare unit, and parity is maintained in the normal fashion.

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