Patent FR995966A successfully refreshed from Google Patents.
Patent EP0576226A2 successfully refreshed from Google Patents.
EP0576226A2
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EP
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Method and apparatus for reading image of image scanner-reader
Assignee: Fujitsu Ltd
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Filing: 1993-06-21
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Granted: —
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Expires: 2013-06-21
Abstract
Abstract An image scanner-reader has an image read unit (1, 2, 3), and an employing control unit (11, 12, 13, 14). The image read unit (1, 2, 3) is used to read an original document (10) and provide image data of the original document (10). The employing control unit (11, 12, 13, 14) is used to control the relative moving speed between the original document (10) and the image read unit (1), and when an original document reading operation is suspended, the employing control unit (11, 12, 13, 14) controls the restart of the reading operation after decreasing the relative moving speed to a slow reading speed of the original document (10). Therefore, when the image data buffer (9) becomes full enough to cause a suspension state, and the read operation is restarted after changing control conditions, so that the quantity of data transferred to the image data buffer (9) is reduced. Namely, according to the present invention, the number of occurrences of the suspension state can be greatly reduced, and thereby the overall reading speed can be improved without increasing the data receiving speed of a host device.
Inventors
- 👤 Yukako c/o Fujitsu Limited Murai
- 👤 Tamio c/o Fujitsu Limited Amagai
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 14:16
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/32; H04N1/32358; H04N1/32443; H04N1/32448; H04N1/04; H04N1/047; H04N1/0473; H04N1/00127; H04N1/00204; H04N1/10; H04N1/1013; H04N1/1017; H04N1/12; H04N1/19; H04N1/191; H04N1/192; H04N1/193; H04N2201/00; H04N2201/0077; H04N2201/0081; H04N2201/024; H04N2201/02406; H04N2201/02439; H04N2201/04; H04N2201/047; H04N2201/04753; H04N2201/04755; H04N2201/04756; H04N2201/04794; H04N2201/32; H04N2201/3285; H04N2201/3287; H04N2201/329; H04N2201/3294; H04N2201/3295
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
87 words
An image scanner-reader comprising an image read means (1) for reading an original document (10) and providing image data of said original document (10) and an employing control means (11, 12, 13, 14) for controlling the relative moving speed between said original document (10) and said image read means (1), characterized in that said employing control means (11, 12, 13, 14) controls the restart of the reading operation after decreasing the relative moving speed to a slow reading speed, when an original document reading operation is suspended.
Claim 2
Dependent Claim
60 words
An image scanner-reader as claimed in claim 1, wherein said printed circuit board (3) includes a resolution conversion means (9) for converting a resolution of the data provided by said image read means (1), and said resolution conversion circuit (9) lowers the resolution of said data provided by said image read means (1) when the relative moving speed is decreased.
Claim 3
Dependent Claim
48 words
An image scanner-reader as claimed in claim 1, wherein said printed circuit board (3) includes a CCD reading speed adjust means (50) for adjusting a CCD scan speed, and said CCD reading speed adjust means (50) decreases the CCD scan speed when the relative moving speed is decreased.
Claim 4
Dependent Claim
35 words
An image scanner-reader as claimed in any one of the preceding claims, wherein a reading speed after restarting the suspended read operation is determined depending on the quantity of data transmitted to a host device.
Claim 5
Dependent Claim
54 words
An image scanner-reader as claimed in any one of the preceding claims, wherein said image read means (1) comprises a light source (2) for irradiating said original document (10) and a printed circuit board (3) for receiving reflected light from said original document (10) and provide said image data of said original document (10).
Claim 6
Dependent Claim
89 words
An image scanner-reader as claimed in claim 5, wherein said printed circuit board (3) comprises: a CCD circuit (5), an image processing circuit (6) for converting an output of said CCD circuit (5) into binary signals; an image data buffer (7) for temporarily storing image data composed of the binary values provided by said image processing circuit (6); and an interface circuit (8) for transferring the image data into said image data buffer (7) and send the image data from said image data buffer (7) to a host device.
Claim 7
Dependent Claim
39 words
An image scanner-reader as claimed in any one of the preceding claims, wherein said employing control means comprises a motor (14) for moving said image read means (1), and thereby controls the speed of said image read means (1).
Claim 8
Dependent Claim
37 words
An image scanner-reader as claimed in any one of the preceding claims, wherein said employing control means comprises a motor (15) for moving said original document (10), and thereby controls the speed of said original document (10).
Claim 9
Independent Claim
93 words
A method of reading original document (10) by an image scanner-reader having an image read means (1) and an image data buffer (7), characterized in that said method comprises the steps of: reading an original document (10) and providing image data of said original document (10); suspending an original document reading operation, when said image data buffer (7) becomes full of data and impossible to receive no more data; and decreasing a relative moving speed between said original document (10) and said image read means (1) and restarting the original document reading operation.
Claim 10
Dependent Claim
52 words
A method of reading original document as claimed in claim 9, wherein, when said image data buffer (7) becomes full of data and impossible to receive no more data, a resolution of the binary data provided by said image read means (1) is lowered in accordance with decreasing the relative moving speed.
Claim 11
Dependent Claim
43 words
A method of reading original document as claimed in claim 9, wherein, when said image data buffer (7) becomes full of data and impossible to receive no more data, a CCD scan speed is decreased in accordance with decreasing the relative moving speed.
Claim 12
Independent Claim
39 words
A method of reading original document as claimed in any one of claims 9 to 11, wherein a reading speed after restarting the suspended read operation is determined depending on the quantity of data transmitted to a host device.
Claim 13
Dependent Claim
112 words
An image scanner-reader for processing image data and transmitting the processed data to a host device, having a screen buffer (106) for storing digital image data of an original document (110) read by a read means (105) and an image processing means (107) for processing the image data stored in said screen buffer (106), characterized in that said image scanner-reader further comprises a control means (109) for erasing the image data stored in said screen buffer (106) in response to an end signal provided by said host device, wherein all instructions before the end signal output from said host device are executed on the image data stored in said screen buffer (106).
Claim 14
Dependent Claim
30 words
An image scanner-reader as claimed in claim 13, wherein said image processing means (107) includes a plurality of processing means such as resolution conversion means, rotation means, and compression means.
References Cited (Backward Citations)
No citation records indexed.
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