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1. 发明授权

EP0149122B1 A method for converting a bit map of an image to a run length or run end representation 有权
标题翻译：一种用于将图像的位图转换为运行长度或运行结束表示的方法
公开(公告)号：EP0149122B1
公开(公告)日：1991-02-20
申请号：EP84115009.7
申请日：1984-12-11
申请人： International Business Machines Corporation
发明人： Anderson, Karen Louise , Goertzel, Gerald , Mitchell, Joan La Verne
IPC分类号： H04N1/419
CPC分类号： H03M7/46 , H04N1/419

2. 发明公开

EP0221418A3 Improved method for rotating a binary image 失效
标题翻译：改进二进制图像的方法
公开(公告)号：EP0221418A3
公开(公告)日：1989-06-07
申请号：EP86114397.2
申请日：1986-10-17
申请人： International Business Machines Corporation
发明人： Pruett, David Raymond , Goertzel, Gerald , Thompson, Gerhard Robert
IPC分类号： G06F15/62
CPC分类号： G06T3/602
摘要： A method for rotating binary data by 90 degrees in a byte oriented data processing system, comprising the steps of: storing the data in a matrix arranged in r by c rows, where r may be equal to c, information in each row being stored in a number of bytes, each byte having b bits there being c/b bytes in each row; separating the matrix into groups of bits of rotatable size; and transposing first preselected bit positions with second preselected bit positions in each group, followed by exchanging a first one or more rows of bits in the group with a second one or more rows of bits in the group for one sense of rotation and exchanging followed by transposing for the opposite sense of rotation.

3. 发明公开

EP0149119A3 Method for rotating a binary image 有权
标题翻译：旋转二进制图像的方法
公开(公告)号：EP0149119A3
公开(公告)日：1987-12-02
申请号：EP84115005
申请日：1984-12-11
申请人： International Business Machines Corporation
发明人： Anderson, Karen Louise , Mintzer, Frederick Cole , Goertzel, Gerald , Mitchell, Joan La Verne
IPC分类号： G06F15/62
CPC分类号： G06T3/602
摘要： 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.

4. 发明公开

EP0221418A2 Improved method for rotating a binary image 失效
标题翻译： Verfahren zur Rotierung einesbinärenBildes。
公开(公告)号：EP0221418A2
公开(公告)日：1987-05-13
申请号：EP86114397.2
申请日：1986-10-17
申请人： International Business Machines Corporation
发明人： Pruett, David Raymond , Goertzel, Gerald , Thompson, Gerhard Robert
IPC分类号： G06F15/62
CPC分类号： G06T3/602
摘要： A method for rotating binary data by 90 degrees in a byte oriented data processing system, comprising the steps of: storing the data in a matrix arranged in r by c rows, where r may be equal to c, information in each row being stored in a number of bytes, each byte having b bits there being c/b bytes in each row; separating the matrix into groups of bits of rotatable size; and transposing first preselected bit positions with second preselected bit positions in each group, followed by exchanging a first one or more rows of bits in the group with a second one or more rows of bits in the group for one sense of rotation and exchanging followed by transposing for the opposite sense of rotation.
摘要翻译：一种用于在面向字节的数据处理系统中将二进制数据旋转90度的方法，包括以下步骤：将数据存储在以r行排列的矩阵c行中，其中r可以等于c，存储在每行中的信息一个字节数，每个字节有b位，每行有c / b字节; 将矩阵分解成可旋转大小的位组; 并且将每个组中的第二预选位位置的第一预选位位置转置，然后在该组中与该组中的第二个一行或多行比特交换组中的第一个或多个比特行，以进行一次旋转和交换，然后进行交换转置为相反的旋转感。

5. 发明公开

EP0225488A3 Log encoding/decoding method 失效
标题翻译：日志编码器/解码器系统
公开(公告)号：EP0225488A3
公开(公告)日：1990-03-21
申请号：EP86115454.0
申请日：1986-11-07
申请人： International Business Machines Corporation
发明人： Mitchell, Joan LaVerne , Pennebaker, William Boone , Goertzel, Gerald
IPC分类号： G06F1/03 , G06F7/52 , H03M7/40
CPC分类号： G06F7/5235 , G06F1/0307 , G06F7/4833 , H03M7/4006
摘要： A high speed form of finite precision binary arithmetic coding comprises encoding/decoding performed in the logarithm domain, resulting in facilitated computation based on additions and subtractions rather than multiplications and divisions. In encoding and decoding, antilogs are used which are retrieved from an antilog table. The antilog table is characterized by the following constraints to assure decodability wherein for any two mantissas a and representing respective inputs to the antilog table:
(a) antilog (a + β) antilog (α)* antilog (β); at least when (α + β) is less than one; and (b) each antilog table output value is to be unique.

6. 发明公开

EP0199035A3 Adaptive method for character data compression 失效
标题翻译：用于字符数据压缩的自适应方法
公开(公告)号：EP0199035A3
公开(公告)日：1989-11-29
申请号：EP86103033.6
申请日：1986-03-07
申请人： International Business Machines Corporation
发明人： Goertzel, Gerald
IPC分类号： H03M7/42 , H03M7/40 , G06F15/40
CPC分类号： H03M7/42 , H03M7/4006
摘要： An adaptive method of file compression is based on the recognition that language can be thought of as a stream of alternating words and separators. Empty dictionaries are created for the words and separators. For each event in the data stream, a determination is made whether the word is in the dictionary for words compiled from the previously encountered words or whether the word is a new word. If the event is a separator, a similar determination is made using the dictionary for separators. If the event is a new word or a new separator, the event is encoded with a predetermined new word or new separator symbol followed by encoding the characters of the word or separator. A count is maintained of all word events and a count is maintained of all separator events as those events are encoded. In addition, individual counts for each occurrence of a word and each occurrence of a separator are maintained. The ratio of the number of times a word has been encountered to the total number of words encountered is used to estimate the probability of the word. Similarly, the ratio of the number of times a separator has been encountered is used to estimate the probability of the separator. These probabilities are used with a coding scheme, such as arithmetic coding, to code the words and separators in the two dictionaries.

7. 发明公开

EP0149122A3 A method for converting a bit map of an image to a run length or run end representation 有权
标题翻译：一种用于将图像的位图转换为运行长度或运行结束表示的方法
公开(公告)号：EP0149122A3
公开(公告)日：1987-07-15
申请号：EP84115009
申请日：1984-12-11
申请人： International Business Machines Corporation
发明人： Anderson, Karen Louise , Goertzel, Gerald , Mitchell, Joan La Verne
IPC分类号： H04N01/419
CPC分类号： H03M7/46 , H04N1/419
摘要： 57 A method for converting an image from a bit map to a run end or run length representation includes the steps of: storing said image as a bit map representation; initializing all variables to be used in the conversion process; converting by table lookup, each run of continuous color to a run end; storing, in a run end buffer, as a count value, each run end; repeating the steps of converting and storing for each run of continuous color to the end of the image.

8. 发明公开

EP0201674A2 A method for reproducing multi-level digital images on a bi-level printer of fixed dot size 失效
标题翻译：再现具有通过与固定点尺寸双色调打印机的装置的多个色调的数字图像的方法。
公开(公告)号：EP0201674A2
公开(公告)日：1986-11-20
申请号：EP86102646.6
申请日：1986-02-28
申请人： International Business Machines Corporation
发明人： Goertzel, Gerald , Thompson, Gerhard Robert
IPC分类号： H04N1/411
CPC分类号： H04N1/4052 , H04N1/4055
摘要： 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.

9. 发明公开

EP0179205A2 Improved method for enlarging a binary image 失效
标题翻译：一种用于二值图像放大方法。
公开(公告)号：EP0179205A2
公开(公告)日：1986-04-30
申请号：EP85109459.9
申请日：1985-07-30
申请人： International Business Machines Corporation
发明人： Anderson, Karen Louise , Mintzer, Frederic Cole , Goertzel, Gerald
IPC分类号： G06F15/62
CPC分类号： H04N1/3935 , G06T3/4023
摘要： A method for enlarging a binary image by an arbitrary factor includesthe steps of storing the image in bitsequence; rotating the image in a first direction by ninety degrees; inserting one or more rows of expansion bits along the original horizontal axis of the image to convert i rows of bits to j rows of bits where i]j]=2i; assigning a value to each expansion bit generated bythe above step; repeating the steps of inserting and assigning a predetermined number of times to achieve an enlargement by a factor F1 along the original horizontal axis; rotating the image in a second direction opposite the first direction by ninety degrees; inserting one or more rows of expansion bits along the vertical axis of the image to convert i rows of bits to j rows of bits where i]j]=2i; assigning a value to each expansion bit generated by the above step; repeating the steps of inserting and assigning a predetermined number of times to achieve an enlargement by a factor F2 along the vertical axis; storing the enlarged image generated by the above steps.

10. 发明授权

EP0201674B2 A method for reproducing multi-level digital images on a bi-level printer of fixed dot size 失效
标题翻译：再现具有通过与固定点尺寸双色调打印机的装置的多个色调的数字图像的方法。
公开(公告)号：EP0201674B2
公开(公告)日：1994-04-13
申请号：EP86102646.6
申请日：1986-02-28
申请人： International Business Machines Corporation
发明人： Goertzel, Gerald , Thompson, Gerhard Robert
IPC分类号： H04N1/411
CPC分类号： H04N1/4052 , H04N1/4055

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