| US 7,613,833 B2 | ||
| Data processing apparatus and data processing method, and computer program | ||
| Masahiro Odaira, Kanagawa-ken (Japan); Fumio Shoji, Kanagawa-ken (Japan); Takao Ikuno, Kanagawa-ken (Japan); Yoshiaki Katahira, Kanagawa-ken (Japan); Toru Fujino, Saitama-ken (Japan); Kenji Kasuya, Kanagawa-ken (Japan); Noritsugu Okayama, Kanagawa-ken (Japan); and Yasuhito Niikura, Chiba-ken (Japan) | ||
| Assigned to Canon Kabushiki Kaisha, Tokyo (Japan) | ||
| Appl. No. 10/536,874 PCT Filed Mar. 17, 2005, PCT No. PCT/JP2005/005443 § 371(c)(1), (2), (4) Date May 27, 2005, PCT Pub. No. WO2005/094056, PCT Pub. Date Oct. 06, 2005. |
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| Claims priority of application No. 2004-090059 (JP), filed on Mar. 25, 2004. | ||
| Prior Publication US 2006/0149835 A1, Jul. 06, 2006 | ||
| Int. Cl. G06F 15/173 (2006.01); G06F 15/16 (2006.01); G06F 15/00 (2006.01) | ||
| U.S. Cl. 709—246 [709/224; 358/1.16] | 4 Claims |
| 1. A data processing apparatus for output-processing image data for respective pages, comprising:
a memory for storing page management records and page data;
a page data management unit constructed to perform a management process for each of respective pages scanned by an image reader,
wherein the management process comprises:
creating a page management record for each of the respective pages and storing the page management record in the memory, wherein
the page management record corresponds to a respective page scanned by the image reader,
generating a first type of page data and a second type of page data and storing the first and second types of page data in
the memory, wherein the first type of page data includes RAW image data representing the respective page and the second type
of page data includes image data generated by encoding the RAW image data included in the first type of page data,
writing a memory address of the first type of page data and a memory address of the second type of page data to the page management
record for the respective page,
managing respective output processes by a first output unit and a second output unit referring to the created page management
record to process the first type of page data or the second type of page data, and
maintaining on the page management record, a link count that counts a number of output units that refer to the page management
record and a flag that indicates whether reference to the page management record by output units is complete,
deleting the first type of page data from the page management record in response to determining that the link count is zero
for the first type of page data and in response to the flag indicating completion of the reference by both the first and second
output units to the first type of page data, and
a control unit constructed to perform a control process for each of said respective pages scanned by the image reader, wherein
the control process comprises:
monitoring completion of storing the first type of page data scanned by the image reader in the memory,
encoding the RAW image data included in the first type of page data in response to the completion of storing, and
determining whether or not image data resulting from encoding the RAW image data exists,
wherein if the resultant image data does not exist, the control unit controls the first output unit to output the RAW image
data,
wherein if the resultant image data does exist, the control unit decodes the resultant image data into RAW image data, and
controls the first output unit to output the decoded RAW image data, and
wherein if the second output unit is not referring to the RAW image data of which the first output unit completes an output,
the control unit deletes the RAW image data of which the first output unit completes the output.
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