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公开(公告)号：WO2004032022A3
公开(公告)日：2004-08-26
申请号：PCT/GB0303947
申请日：2003-09-12
Inventor： MITCHELL JOAN , PRAKASH RAVI
IPC: G06T9/00
CPC classification number: G06T9/007
Abstract: Further compression of data allowing economical storage of data for extended periods of time in high-speed access memory is performed in reduced time by performing further compression during transcoding in the transform domain and without restoring image data to its original image data form. The reduction in processing time is achieved by exploiting the large number of zero-valued quantization transform coefficients and not changing quantized transform coefficients at zig-zag scan positions where non-zero coefficients are rare during range reduction of the entropy decoded quantized transformed data. The range can be restored by computation or estimation of an altered quantization table which is stored with the further compressed quantization values. Further advantages accrue from use of JPEG packed format for the data during transcoding.
Abstract translation: 通过在变换域中的代码转换期间执行进一步的压缩，并且不将图像数据恢复到其原始图像数据形式，可以在缩短的时间内执行进一步压缩数据以允许在高速存取存储器中长时间地经济地存储数据。 处理时间的缩短通过利用大量的零值量化变换系数来实现，并且在熵解码的量化变换数据的范围缩小期间不改变非零系数是罕见的Z字形扫描位置处不改变量化变换系数来实现。 可以通过计算或估计与进一步压缩的量化值一起存储的改变的量化表来恢复该范围。 在转码过程中，使用JPEG压缩格式为数据提供了进一步的优势。
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公开(公告)号：JP2003162435A
公开(公告)日：2003-06-06
申请号：JP2002240078
申请日：2002-08-21
Applicant: IBM
Inventor： MITCHELL JOAN LAVERNE , PRAKASH RAVI
Abstract: PROBLEM TO BE SOLVED: To provide an image management method and an image storage size management system. SOLUTION: Using a reduction standard, it is determined how much to reduce the storage size of an image over the time progress. In a first embodiment, reduction of data storage size degrades the image quality. A reduced image replaces the previous reduced image. The reduced image storage size allows longer access to the information in quick access storage and quicker transmission time. COPYRIGHT: (C)2003,JPO
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公开(公告)号：JP2002092682A
公开(公告)日：2002-03-29
申请号：JP2001221750
申请日：2001-07-23
Applicant: IBM
Inventor： RODNEY JENE MOON , PRAKASH RAVI
Abstract: PROBLEM TO BE SOLVED: To provide a system of automatically detecting whether a check is genuine or not. SOLUTION: The system and method detect and certify a watermark of a document such as a check usually including a watermark having a well-known characteristic for confirming the genuineness of the document. A digitalized image of the document is housed, and processed by a conversion for generating the frequency distribution. The frequency distribution is processed so as to discriminate a harmonic at 1 or more by comparing with a storage value related to the document and determine that a watermark exists and that this watermark is genuine.
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公开(公告)号：CA2498665A1
公开(公告)日：2004-04-15
申请号：CA2498665
申请日：2003-09-12
Applicant: IBM
Inventor： PRAKASH RAVI , MITCHELL JOAN
IPC: G06T9/00
Abstract: Further compression of data allowing economical storage of data for extended periods of time in high-speed access memory is performed in reduced time by performing further compression during transcoding in the transform domain an d without restoring image data to its original image data form. The reduction in processing time is achieved by exploiting the large number of zero-valued quantization transform coefficients and not changing quantized transform coefficients at zig-zag scan positions where non-zero coefficients are rare during range reduction of the entropy decoded quantized transformed data. Th e range can be restored by computation or estimation of an altered quantizatio n table which is stored with the further compressed quantization values. Furth er advantages accrue from use of JPEG packed format for the data during transcoding.
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公开(公告)号：AT500571T
公开(公告)日：2011-03-15
申请号：AT03798965
申请日：2003-09-12
Applicant: IBM
Inventor： MITCHELL JOAN , PRAKASH RAVI
IPC: G06T9/00
Abstract: Further compression of data allowing economical storage of data for extended periods of time in high-speed access memory is performed in reduced time by performing further compression during transcoding in the transform domain and without restoring image data to its original image data form. The reduction in processing time is achieved by exploiting the large number of zero-valued quantization transform coefficients and not changing quantized transform coefficients at zig-zag scan positions where non-zero coefficients are rare during range reduction of the entropy decoded quantized transformed data. The range can be restored by computation or estimation of an altered quantization table which is stored with the further compressed quantization values. Further advantages accrue from use of JPEG packed format for the data during transcoding.
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Patent Agency Ranking
公开(公告)号：AU2003263355A8
公开(公告)日：2004-04-23
申请号：AU2003263355
申请日：2003-09-12
Applicant: IBM
Inventor： MITCHELL JOAN , PRAKASH RAVI
IPC: G06T9/00
Abstract: Further compression of data allowing economical storage of data for extended periods of time in high-speed access memory is performed in reduced time by performing further compression during transcoding in the transform domain and without restoring image data to its original image data form. The reduction in processing time is achieved by exploiting the large number of zero-valued quantization transform coefficients and not changing quantized transform coefficients at zig-zag scan positions where non-zero coefficients are rare during range reduction of the entropy decoded quantized transformed data. The range can be restored by computation or estimation of an altered quantization table which is stored with the further compressed quantization values. Further advantages accrue from use of JPEG packed format for the data during transcoding.
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公开(公告)号：CA2498665C
公开(公告)日：2010-12-14
申请号：CA2498665
申请日：2003-09-12
Applicant: IBM
Inventor： MITCHELL JOAN , PRAKASH RAVI
IPC: G06T9/00
Abstract: Further compression of data allowing economical storage of data for extended periods of time in high-speed access memory is performed in reduced time by performing further compression during transcoding in the transform domain and without restoring image data to its original image data form. The reduction in processing time is achieved by exploiting the large number of zero-valued quantization transform coefficients and not changing quantized transform coefficients at zig-zag scan positions where non-zero coefficients are rare during range reduction of the entropy decoded quantized transformed data. The range can be restored by computation or estimation of an altered quantization table which is stored with the further compressed quantization values. Further advantages accrue from use of JPEG packed format for the data during transcoding.
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公开(公告)号：DE60336243D1
公开(公告)日：2011-04-14
申请号：DE60336243
申请日：2003-09-12
Applicant: IBM
Inventor： MITCHELL JOAN , PRAKASH RAVI
IPC: G06T9/00
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公开(公告)号：PL374500A1
公开(公告)日：2005-10-31
申请号：PL37450003
申请日：2003-09-12
Applicant: IBM
Inventor： MITCHELL JOAN , PRAKASH RAVI
IPC: G06T9/00
Abstract: Further compression of data allowing economical storage of data for extended periods of time in high-speed access memory is performed in reduced time by performing further compression during transcoding in the transform domain and without restoring image data to its original image data form. The reduction in processing time is achieved by exploiting the large number of zero-valued quantization transform coefficients and not changing quantized transform coefficients at zig-zag scan positions where non-zero coefficients are rare during range reduction of the entropy decoded quantized transformed data. The range can be restored by computation or estimation of an altered quantization table which is stored with the further compressed quantization values. Further advantages accrue from use of JPEG packed format for the data during transcoding.
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公开(公告)号：AU2003263355A1
公开(公告)日：2004-04-23
申请号：AU2003263355
申请日：2003-09-12
Applicant: IBM
Inventor： MITCHELL JOAN , PRAKASH RAVI
IPC: G06T9/00
Abstract: Further compression of data allowing economical storage of data for extended periods of time in high-speed access memory is performed in reduced time by performing further compression during transcoding in the transform domain and without restoring image data to its original image data form. The reduction in processing time is achieved by exploiting the large number of zero-valued quantization transform coefficients and not changing quantized transform coefficients at zig-zag scan positions where non-zero coefficients are rare during range reduction of the entropy decoded quantized transformed data. The range can be restored by computation or estimation of an altered quantization table which is stored with the further compressed quantization values. Further advantages accrue from use of JPEG packed format for the data during transcoding.
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