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1. 发明授权

US07259891B2 Image compression method, decompression method thereof and program therefor 有权
标题翻译：图像压缩方法及其解压缩方法及其程序
公开(公告)号：US07259891B2
公开(公告)日：2007-08-21
申请号：US10326980
申请日：2002-12-24
申请人： Kenichiro Sakai , Tsugio Noda
发明人： Kenichiro Sakai , Tsugio Noda
IPC分类号： H04N1/41
CPC分类号： H04N1/4175
摘要： In a method of image compression in which vertical and horizontal white skipping are performed, data compression is performed in the regions containing black pixels other than the skipped regions. While vertical and horizontal white skipping being performed, in the other regions, regions are detected in which pixel values change in smooth fashion, such as the outlines of letters and encoding is performed using the pixel value of the leading column of the region, number of columns and amount of change of the pixel values. As a result, the compression factor of the image can be increased and a considerable contribution made to reduce the storage capacity for storage of data and reduce the time required for data transmission.
摘要翻译：在执行垂直和水平白跳过的图像压缩方法中，在包含除跳过区域之外的黑色像素的区域中执行数据压缩。在执行垂直和水平白跳过的同时，在其他区域中，检测像素值以平滑方式变化的区域，例如字母轮廓，并且使用区域的前导列的像素值执行编码列和像素值的变化量。因此，可以增加图像的压缩因子，并且为减少用于存储数据的存储容量和减少数据传输所需的时间而做出相当大的贡献。

2. 发明申请

US20030123087A1 Image compression method, decompression method thereof and program therefor 有权
标题翻译：图像压缩方法及其解压缩方法及其程序
公开(公告)号：US20030123087A1
公开(公告)日：2003-07-03
申请号：US10326980
申请日：2002-12-24
申请人： FUJITSU LIMITED
发明人： Kenichiro Sakai , Tsugio Noda
IPC分类号： B41J001/00 , G06F015/00
CPC分类号： H04N1/4175
摘要： In a method of image compression in which vertical and horizontal white skipping are performed, data compression is performed in the regions containing black pixels other than the skipped regions. While vertical and horizontal white skipping being performed, in the other regions, regions are detected in which pixel values change in smooth fashion, such as the outlines of letters and encoding is performed using the pixel value of the leading column of the region, number of columns and amount of change of the pixel values. As a result, the compression factor of the image can be increased and a considerable contribution made to reduce the storage capacity for storage of data and reduce the time required for data transmission.
摘要翻译：在执行垂直和水平白跳过的图像压缩方法中，在包含除跳过区域之外的黑色像素的区域中执行数据压缩。在执行垂直和水平白跳过的同时，在其他区域中，检测像素值以平滑方式变化的区域，例如字母轮廓，并且使用区域的前导列的像素值执行编码列和像素值的变化量。因此，可以增加图像的压缩因子，并且为减少用于存储数据的存储容量和减少数据传输所需的时间而做出相当大的贡献。

3. 发明授权

US5592297A Method and apparatus for encoding and decoding digital image data 失效
标题翻译：用于对数字图像数据进行编码和解码的方法和装置
公开(公告)号：US5592297A
公开(公告)日：1997-01-07
申请号：US375512
申请日：1995-01-18
申请人： Etienne L. M. E. Van Dorsselaer
发明人： Etienne L. M. E. Van Dorsselaer
IPC分类号： G06T9/00 , H04N1/415 , H04N1/417 , H04N1/41
CPC分类号： G06T9/005 , H04N1/415 , H04N1/4175
摘要： An encoding method for digital image data comprising consecutive blocks of data groups having as content binary values always of an equal number of pixels of an image, utilizing a code which indicates that the encoded block is partly equal to the corresponding part of a reference block, the reference block preferably being the preceding block, and identifies the end point of that part of the reference block by reference to transitions in pixel value in the reference block. On decoding, that part of the reference block is taken over in the decoded block.This encoding method is, in practice, combined with run length encoding and encoding by copying an entire data group in the code.
摘要翻译：一种用于数字图像数据的编码方法，包括具有总是具有相同像素数目的内容二进制值的数据组的连续块，利用指示编码块部分等于参考块的相应部分的代码，参考块优选地是前一块，并且通过参考参考块中的像素值的转变来识别该参考块的该部分的终点。在解码时，参考块的该部分在解码块中被接管。实际上，该编码方法通过复制代码中的整个数据组来与运行长度编码和编码相结合。

4. 发明授权

US5452092A Changing pixel detector for coding of image data 失效
标题翻译：改变图像数据编码的像素检测器
公开(公告)号：US5452092A
公开(公告)日：1995-09-19
申请号：US186092
申请日：1994-01-25
申请人： Ku-Soo Kang , Seung-Beom Yang , Kang-Young Lee
发明人： Ku-Soo Kang , Seung-Beom Yang , Kang-Young Lee
IPC分类号： H04N1/417 , H04N1/415
CPC分类号： H04N1/4175
摘要： A circuit is disclosed to simplify hardware of image transmission system such as a facsimile and also improve an encoding function. This circuit has a part for obtaining from a brightness change detector a brightness signal indicative of a change of brightness of binary valued data serially supplied from a data input part, and providing a detection load data to a storage part in response to generation of said detection signal. Accordingly, the storage part generates a within-line position value for said binary valued data having a change of brightness in response to the detection load data.
摘要翻译：公开了一种电路来简化诸如传真的图像传输系统的硬件，并且还改进了编码功能。该电路具有用于从亮度变化检测器获得指示从数据输入部分串行提供的二值化数据的亮度变化的亮度信号的部分，并且响应于所述检测的产生向存储部分提供检测负载数据信号。因此，存储部件响应于检测负载数据，生成具有亮度变化的所述二进制值数据的内线位置值。

5. 发明授权

US5365347A Coding apparatus 失效
标题翻译：编码装置
公开(公告)号：US5365347A
公开(公告)日：1994-11-15
申请号：US824125
申请日：1992-01-22
申请人： Tohru Ozaki
发明人： Tohru Ozaki
IPC分类号： G06T9/00 , H04N1/417 , H04N1/41
CPC分类号： H04N1/4175
摘要： In a coding apparatus, a first detecting device serves to detect a variation between conditions of pixels in a currently-coded line. A second detecting device serves to detect a variation between conditions of pixels in a reference line which immediately precedes the currently-coded line. A deciding device serves to decide a mode of MR coding in accordance with the variations detected by the first and second detecting devices. The first and second detecting devices and the deciding device are enabled to execute functions thereof in temporally parallel with each other.
摘要翻译：在编码装置中，第一检测装置用于检测当前编码行中的像素的条件之间的变化。第二检测装置用于检测紧接在当前编码行之前的参考线中的像素的条件之间的变化。决定装置用于根据由第一和第二检测装置检测到的变化来确定MR编码的模式。第一和第二检测装置和判定装置能够在时间上彼此平行地执行其功能。

6. 发明授权

US5327253A Facsimile transmission method 失效
标题翻译：传真传输方式
公开(公告)号：US5327253A
公开(公告)日：1994-07-05
申请号：US808373
申请日：1991-12-16
申请人： Yuji Suzuki
发明人： Yuji Suzuki
IPC分类号： G06T9/00 , H04N1/387 , H04N1/417 , H04N1/41
CPC分类号： H04N1/3872 , H04N1/4175
摘要： A page of MMR coded picture data may be transmitted with MMR coded journal data added to the page at the time of transmission. The first line of journal data may be transmitted after it is MMR coded using a total white line as a virtual line. Thereafter, the data of all lines of journal data may MR coded using a preceding line as a reference line and transmitted. A line which may be the same as the virtual line may then be MR coded and transmitted. The MMR coded picture data may then be transmitted line by line directly from a memory. Accordingly, all of the data may be decoded as MR code at the receiving side.
摘要翻译： MMR编码图像数据的页面可以在发送时被添加到页面的MMR编码的日志数据来发送。在使用总白线作为虚拟线进行MMR编码之后，可以发送日志数据的第一行。此后，所有日志数据行的数据可以使用前一行作为参考线进行MR编码并发送。然后可以对与虚拟线路相同的线路进行MR编码和发送。然后可以直接从存储器逐行传输MMR编码图像数据。因此，所有数据可以在接收侧被解码为MR代码。

7. 发明授权

US4860114A Method and apparatus for expanding two-dimensional compressional code 失效
标题翻译：用于扩展二维压缩码的方法和装置
公开(公告)号：US4860114A
公开(公告)日：1989-08-22
申请号：US122697
申请日：1987-11-19
申请人： Ethuo Horikawa , Hidefumi Masuzaki
发明人： Ethuo Horikawa , Hidefumi Masuzaki
IPC分类号： H04N1/415 , H04N1/417
CPC分类号： H04N1/4175
摘要： In an MR code expanding apparatus, a reference line processing circuit shifts reference line data bit-serially and at the same time, searches for a color changing point of the reference line data at seven successive picture element positions in parallel. An output data producing circuit produces, bit-serially and in synchronism with the shifting of the reference line data, expanded line data of each picture element corresponding to each reference line picture element arriving at the center of these seven picture element positions. A code analyzing circuit supplies the reference line processing circuit with a signal which designates one of these seven picture element positions at which the color changing point is to be detected. A signal which represents detection of the color changing point at the designated picture element position is used for controlling the state transition of the expanding operation.
摘要翻译：在MR码扩展装置中，参考线处理电路串行移位参考线数据，同时在七个连续的像素位置并行地搜索参考线数据的变色点。一个输出数据产生电路，与基准线数据的移位同步地产生与到达这七个像素位置的中心的每个参考线象素相对应的每个像素的扩展行数据。代码分析电路为参考线处理电路提供指定要检测颜色变化点的这七个像素位置之一的信号。用于表示在指定像素位置处的颜色变化点的检测的信号用于控制扩展操作的状态转换。

8. 发明授权

US4837848A Apparatus for selecting a reference line for image data compression 失效
标题翻译：用于选择用于图像数据压缩的参考线的装置
公开(公告)号：US4837848A
公开(公告)日：1989-06-06
申请号：US32102
申请日：1987-03-27
申请人： Alex E. Henderson , Frederick L. Drain , Lawrence G. Roberts
发明人： Alex E. Henderson , Frederick L. Drain , Lawrence G. Roberts
IPC分类号： H04N1/417
CPC分类号： H04N1/4175
摘要： An apparatus for selecting a reference line for image data compression including a plurality of mutually connected reference selector chips for selecting a reference scan line from vertical mode coding of image data. The reference selector chips select a reference scan line from a plurality of preceding scan lines in exclusive or combination of the image data of each candidate reference scan line with the image data from the input scan line. The candidate reference scan line that has the lowest number of dissimilar bits is selected as the reference scan line. Each candidate reference scan line has associated therewith a register having bit positions arranged from the highest order bit position to a lowest order bit position for storing a binary sum of the number of dissimilar bits. When the sums are compared, the binary value and successive bit positions are compared from the highest order bit position to the lowest order bit position. When the binary value for a compared bit position of a register is greater than the binary value in the corresponding bit position of another register, each reference selector chip generates a losing signal for indicating that the register lost the arbitration. When the lowest order bit position of a register is not greater than the lowest order bit position of any other register and no losing signal was generated for the register, the associated chip generates a winning signal for indicating which candidate reference scan line had the least number of bits dissimilar to the corresponding bits in the input scan line. Each chip further includes a circuit for establishing a priority among the candidate reference scan lines so that two registers both having the smallest binary sum will not create a deadlock.

9. 发明授权

US4799110A Image signal coding apparatus 失效
标题翻译：图像信号编码装置
公开(公告)号：US4799110A
公开(公告)日：1989-01-17
申请号：US888493
申请日：1986-07-23
申请人： Katsutoshi Hisada , Nobuaki Kokubu , Shigeki Sakurai , Yukio Murata , Tatsuo Okano
发明人： Katsutoshi Hisada , Nobuaki Kokubu , Shigeki Sakurai , Yukio Murata , Tatsuo Okano
IPC分类号： G06T9/00 , H04N1/417 , H04N1/40
CPC分类号： H04N1/4175 , G06T9/005
摘要： An image signal coding apparatus includes reference and coding line change point detection circuits, reference line shift registers, a coding line shift register, a symbol detection circuit, coding and reference line ROM tables, and a code determination circuit. The coding line change point detection circuit receives a serial reference line image signal in synchronism with a serial coding line image signal. The reference line shift registers receive serial change point data in the reference line image signal and output parallel reference line change point data. The coding line shift register receives serial change point data in the coding line image signal and outputs parallel coding line change point data. The symbol detection circuit monitors output states of the reference and coding line shift registers. A run length counter counts the number of pixels between the change points in the coding line image signal. The ROM tables cooperate with the code determination circuit to code the coding line image signal in response to outputs from the symbol detection circuit and the run length counter.
摘要翻译：图像信号编码装置包括参考编码线切换点检测电路，参考线移位寄存器，编码线移位寄存器，符号检测电路，编码和参考线ROM表以及代码确定电路。编码线变换点检测电路与串行编码线图像信号同步地接收串行参考线图像信号。参考线移位寄存器在参考线图像信号中接收串行变化点数据，并输出并行参考线变化点数据。编码行移位寄存器在编码行图像信号中接收串行变换点数据，并输出并行编码行变更点数据。符号检测电路监视参考和编码行移位寄存器的输出状态。运行长度计数器对编码行图像信号中的变化点之间的像素数进行计数。 ROM表与代码确定电路协调，以响应于符号检测电路和游程长度计数器的输出对编码行图像信号进行编码。

10. 发明授权

US4725815A Method for encoding and decoding a digital image 失效
标题翻译：数字图像编码和解码方法
公开(公告)号：US4725815A
公开(公告)日：1988-02-16
申请号：US841483
申请日：1986-03-19
申请人： Joan L. Mitchell , Karen L. Anderson , Gerald Goertzel
发明人： Joan L. Mitchell , Karen L. Anderson , Gerald Goertzel
IPC分类号： G06T9/00 , H04N1/417 , H03M7/48
CPC分类号： H04N1/4175 , G06T9/005
摘要： A method for encoding and decoding digital image data, includes the steps of: testing the data for a vertical relationship between adjacent lines of the image; generating directly a reference code word representative of the vertical relationship for each successful test; generating by table lookup a run code word for a stream of data bits of common value for each unsuccessful test whereby a data element representing a number of bits in a code word is stored at a predetermined offset from a table entry for the code word; merging the vertical reference code words and the run code words generated by the above steps to form an encoded data stream; testing the encoded data stream for a reference code; decoding directly the vertical relationship from the reference code for each successful test; decoding by table lookup a run of bits of common value by serial examination of said encoded data stream for each unsuccessful test; and storing data decoded by the above steps in a predetermined relationship. A fast algorithm for modifying an image in run representation form before encoding or after decoding is also described.
摘要翻译：一种用于对数字图像数据进行编码和解码的方法，包括以下步骤：测试图像的相邻行之间的垂直关系的数据; 直接生成代表每个成功测试的垂直关系的参考代码字; 通过表查找生成用于每个不成功测试的公共值数据位流的运行代码字，由此表示码字中的位数的数据元素以与代码字的表项相对应的预定偏移量被存储; 合并垂直参考码字和通过上述步骤生成的游程码字以形成编码数据流; 测试编码数据流的参考代码; 从每个成功测试的参考代码直接解码垂直关系; 通过针对每个不成功测试对所述编码数据流进行串行检查，通过表查找解码通用值的位; 并以预定关系存储通过上述步骤解码的数据。还描述了用于在编码之前或解码之后以运行表示形式修改图像的快速算法。

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