Patent US4943870A successfully refreshed from Google Patents.
US4943870A
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Image magnify/reduce apparatus
Assignee: Canon Inc
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Filing: 1989-10-30
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Granted: 1990-07-24
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Expires: 2009-10-30
Abstract
Abstract An image magnifying/reducing apparatus has an element or system for reading a document image to output it as an image signal, and a processor for magnifying/reducing the image signal output by the read. The processor includes an element or system for changing a magnification/reduction factor during the magnifying/reducing process of the image signal, and can make such a change in the factor for each line.
Inventors
- 👤 Kiyohisa Sugishima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:29
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/387; G; G06; G06T; G06T3/00; G06T3/40
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
106 words
An image magnifying and/or image reducing apparatus comprising: image signal generating means for generating an image signal in units of a line; and processing means for processing an image signal generated in units of a line by said image signal generating means, wherein said processing means includes at least one of (1) means for magnifying and (2) means for reducing an image signal generated in units of a line, to output a variably-magnified or variably-reduced signal, respectively, and said magnifying means or reducing means, respectively, is capable of changing a magnifying or reducing factor, respectively, by gradation for each N lines, N being a positive integer.
Claim 2
Dependent Claim
106 words
An image magnifying and/or image reducing apparatus comprising: image signal generating means for generating an image signal in units of a line; and processing means for processing an image signal generated in units of a line by said image signal generating means, wherein said processing means includes at least one of (1) means for magnifying and (2) means for reducing an image signal generated in units of a line, to output a variably-magnified or variably-reduced signal, respectively, and said magnifying means or reducing means, respectively, is capable of changing a magnifying or reducing factor, respectively, by gradation for each N lines, N being a positive integer.
Claim 3
Dependent Claim
52 words
An image magnifying and/or image reducing apparatus according to claim 1, wherein said processing means includes means for binarizing an image signal generated in units of a line and said magnifying means or reducing means, respectively, magnifies or reduces a binary signal output in units of a line from said binarizing means.
Claim 4
Dependent Claim
72 words
An image magnifying and/or image reducing apparatus according to claim 1, wherein said image signal generating means includes means for reading a document image line by line to output an image signal in units of a line, and means for driving said reading means to scan a document, said driving means being capable of changing a scan speed of said reading means in plural steps during one scan for document image reading.
Claim 5
Dependent Claim
77 words
An image magnifying and/or image reducing apparatus according to claim 3, wherein said drive means includes a stepping motor actuated in response to an input pulse, and wherein said processing means includes means for generating a sync signal for outputting an image signal in units of a line from said document image reading means and means for generating said input pulse, the number of such input pulses being changed in association with generation of said sync signal.
Claim 6
Dependent Claim
74 words
An image magnifying and/or image reducing apparatus comprising: scan means for scanning a document image; driving means for driving said scan means, said drive means having a stepping motor; and control means for controlling said drive means to control the scan operation of said scan means, said control means controlling said drive means to change a scan speed of said scan means by gradation during one scan of a document for document image reading.
Claim 7
Dependent Claim
74 words
An image magnifying and/or image reducing apparatus comprising: scan means for scanning a document image; driving means for driving said scan means, said drive means having a stepping motor; and control means for controlling said drive means to control the scan operation of said scan means, said control means controlling said drive means to change a scan speed of said scan means by gradation during one scan of a document for document image reading.
Claim 8
Dependent Claim
83 words
An image magnifying and/or image reducing apparatus according to claim 5, wherein said drive means is actuated in response to an input pulse, and wherein said control means includes means for generating a sync signal having a predetermined period and means for generating said input pulse on the basis of said sync signal, the number of such input pulses being changed by gradation in association with generation of said sync signal in order to vary a scan speed of said scan means gradually.
Claim 9
Dependent Claim
99 words
An image magnifying and/or image reducing apparatus according to claim 6, wherein said scan means includes means for reading a document image line by line to output an image signal in units of a line and at least one of (1) means for magnifying and (2) means for reducing an image signal output in units of a line from said document image reading means to output a variably-magnified or variably-reduced signal, respectively, and said magnifying means or reducing means is respectively capable of changing a magnifying or reducing factor gradually for each N lines, N being a positive integer.
Claim 10
Dependent Claim
27 words
An image magnifying and/or image reducing apparatus according to claim 7, wherein said document image read means outputs an image signal in synchronism with said sync signal.
Claim 11
Dependent Claim
73 words
An image magnifying and/or image reducing apparatus comprising: image signal generating means for generating an image signal; and at least one of (1) image magnification processing means and (2) reduction processing means, respectively for magnifying and for reducing an image signal output by said image signal generation means, wherein said magnification processing means or reduction processing means, respectively, is capable of changing a magnifying or a reducing factor, respectively, in a predetermined period.
Claim 12
Dependent Claim
73 words
An image magnifying and/or image reducing apparatus comprising: image signal generating means for generating an image signal; and at least one of (1) image magnification processing means and (2) reduction processing means, respectively for magnifying and for reducing an image signal output by said image signal generation means, wherein said magnification processing means or reduction processing means, respectively, is capable of changing a magnifying or a reducing factor, respectively, in a predetermined period.
Claim 13
Dependent Claim
71 words
An image magnifying and/or image reducing apparatus according to claim 9, wherein said image signal generating means includes means for reading a document image line by line to output an image signal in units of a line, and wherein said magnification processing means or reduction processing means, in units of a line, magnifies or reduces, respectively, an image signal output in units of a line from said document image reading means.
Claim 14
Dependent Claim
41 words
An image magnifying and/or image reducing apparatus according to claim 10, wherein said magnification processing means or reduction processing means is capable of changing a magnifying or reducing factor, respectively, by gradation for each N lines, N being a positive integer.
Claim 15
Dependent Claim
66 words
An image magnifying and/or image reducing apparatus according to claim 1, wherein said magnifying means or reducing means, respectively, includes buffer means for storing an image signal, and wherein said magnifying means or reducing means, respectively, performs image reducing operation upon storing the image signal in said buffer means, and performs an image magnifying operation upon reading out of the image signal from said buffer means.
Claim 16
Dependent Claim
34 words
An image magnifying and/or image reducing apparatus according to claim 1, wherein said magnifying or reducing means, respectively, is capable of changing a magnifying factor or reducing, factor, respectively, gradually for each one line.
Claim 17
Dependent Claim
56 words
An image magnifying and/or image reducing apparatus according to claim 7, further comprising binarizing means for binarizing an image signal output in units of a line from said document image reading means, wherein said magnifying means or reducing means, respectively, magnifies or reduces a binary signal output in units of a line from said binarizing means.
Claim 18
Dependent Claim
74 words
An image magnifying and/or image reducing apparatus according to claim 10, wherein said magnification processing means or reduction processing means, respectively, includes buffer means for storing an image signal, and wherein said magnification processing means or reduction processing means, respectively, performs an image reducing operation upon storing the image signal in said buffer means, and performs an image magnifying or reducing operation, respectively, upon reading out of the image signal from said buffer means.
Claim 19
Dependent Claim
70 words
An image magnifying and/or image reducing apparatus according to claim 10, further comprising means for generating a sync signal in a predetermined period, said sync signal being adapted for outputting an image signal in units of a line from said original image reading means, wherein said magnification processing means or reduction processing means, respectively, changes a magnifying or reducing factor, respectively, by gradation on the basis of said sync signal.
Claim 20
Dependent Claim
24 words
An image magnifying and/or image reducing apparatus according to claim I, wherein said processing means includes both said magnifying means and said reducing means.
Claim 21
Dependent Claim
24 words
An image magnifying and/or image reducing apparatus according to claim 7, wherein said scan means includes both said magnifying means and said reducing means.
Claim 22
Dependent Claim
22 words
An image magnifying and/or image reducing apparatus according to claim 9, comprising both said magnification processing means and said reduction processing means.
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