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    4.
    发明专利
    未知

    公开(公告)号：DE3587107T2

    公开(公告)日：1993-08-12

    申请号：DE3587107

    申请日：1985-11-05

    Applicant: IBM

    Inventor： ANDERSON KAREN LOUISE ,  MITCHELL JOAN LAVERVE

    IPC: G06F3/153 ,  G06F3/14 ,  G06T3/60 ,  G06T11/00 ,  G09G5/36 ,  G06F15/62

    Abstract: A method and apparatus for converting an image in run representation form into a raster image which is rotated by some multiple of 90° from the orientation of the original image is disclosed wherein the original image data which is stored in run end or run length form may be divided and stored in discontiguous blocks. In implementing a 90° rotation. the image data is conceptually divided into vertical strips, each of which is independently rotated to create a horizonatl strip of the output image. The rotation process is carned out by firstly converting the run representation image data to raster form, dividing the data in each row among a number of intermediate buffers, each of which contains the data from one vertical stnp of the original image. The contents of each buffer are rotated and rearranged in an available buffer to form a horizontal stnp of the rotated image ready for raster readout Similarly, a convenient method of rotating the input image 180° is also described wherein the original image is read in run representation form a row at a time and the rows are converted to raster form and placed in storage in reverse order, with the order of the bits in each row also reversed.

    5.
    发明专利
    未知

    公开(公告)号：DE3582701D1

    公开(公告)日：1991-06-06

    申请号：DE3582701

    申请日：1985-06-11

    Applicant: IBM

    Inventor： ANDERSON KAREN LOUISE ,  MITCHELL JOAN LA VERNE ,  PENNEBAKER WILLIAM BOONE ,  GOERTZEL GERALD

    IPC: G06F3/153 ,  G06T9/00 ,  H03M7/46 ,  H04N1/41 ,  H04N1/419

    Abstract: A method for converting an image from a bit map to a run end or run length representation includes the steps of : storing the image as a bit map representation; accessing for each byte in an image by a look-up table a selected routine, corresponding to such byte, from a number of routines for converting bit strings to run representations, wherein the look-up table accessed is selected in accordance with a color value of a preceding pixel binary bit; and executing the selected routine on the current byte to convert the bit string to a run representation; storing in a run representation buffer, as a count value, each run representation; repeating the above steps of accessing and executing for each byte and storing for each run of continuous color to the end of the image.

    7.
    发明专利
    未知

    公开(公告)号：DE3484136D1

    公开(公告)日：1991-03-28

    申请号：DE3484136

    申请日：1984-12-11

    Applicant: IBM

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

    IPC: H04N1/41 ,  G06F3/14 ,  G06T9/00 ,  H03M7/46 ,  H04N1/419

    Abstract: 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.
    发明专利
    未知

    公开(公告)号：DE3484135D1

    公开(公告)日：1991-03-28

    申请号：DE3484135

    申请日：1984-12-11

    Applicant: IBM

    Inventor： MITCHELL JOAN LA VERNE ,  ANDERSON KAREN LOUISE

    IPC: G06T9/00 ,  H03M7/46 ,  H04N1/419

    Abstract: A method for converting an image from a run represen-; tation to a bit map, includes the steps of: storing a plurality of run representations of an image in a buffer; initializing a line of data; converting, by table lookup, each run representation, in said line, to a picture element representation, storing said picture element representation of said line; repeating the steps of initializing, converting and storing for remaining run representations until said image has been converted to a bit map representation.

    9.
    发明专利
    未知

    公开(公告)号：DE3587107D1

    公开(公告)日：1993-03-25

    申请号：DE3587107

    申请日：1985-11-05

    Applicant: IBM

    Inventor： ANDERSON KAREN LOUISE ,  MITCHELL JOAN LAVERVE

    IPC: G06F3/153 ,  G06F3/14 ,  G06T3/60 ,  G06T11/00 ,  G09G5/36 ,  G06F15/62

    Abstract: A method and apparatus for converting an image in run representation form into a raster image which is rotated by some multiple of 90° from the orientation of the original image is disclosed wherein the original image data which is stored in run end or run length form may be divided and stored in discontiguous blocks. In implementing a 90° rotation. the image data is conceptually divided into vertical strips, each of which is independently rotated to create a horizonatl strip of the output image. The rotation process is carned out by firstly converting the run representation image data to raster form, dividing the data in each row among a number of intermediate buffers, each of which contains the data from one vertical stnp of the original image. The contents of each buffer are rotated and rearranged in an available buffer to form a horizontal stnp of the rotated image ready for raster readout Similarly, a convenient method of rotating the input image 180° is also described wherein the original image is read in run representation form a row at a time and the rows are converted to raster form and placed in storage in reverse order, with the order of the bits in each row also reversed.

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