US5008947A
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US
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Method and apparatus for correcting extension rates of images
Assignee: Toshiba Corp
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Filing: 1989-10-10
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Granted: 1991-04-16
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Expires: 2009-10-10
Abstract
Abstract Positions of marker images included in two images obtained by a digital radiography system are detected by a marker position detecting section. The marker image intervals in each image are calculated by an extension rate correcting section in accordance with the detected positions of the marker images. Reduction/extension for one image is perfomed in accordance with the extension rate of the image obtained by a ratio of the calculated marker image intervals, thereby coinciding extension rates of two images.
Inventors
- 👤 Naoki Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:34
CPC Classifications
G; G03; G03B; G03B42/00; G03B42/02; G06; G06T; G06T5/00; G06T5/80; H; H05; H05G; H05G1/00; H05G1/08; H05G1/26
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
132 words
A method for reducing and expanding images, the method comprising the steps of: acquiring a plurality of images, each image including a plurality of marker images; detecting positions of the marker images on each image; calculating marker image intervals from the detected marker image positions; selecting one of the plurality of images as a standard image; fitting a position of a remaining image to that of the standard image by a rotation and shift process, the remaining image being one of the plurality of images other than the standard image; obtaining an extension rate from the calculated marker image intervals of the marker image positions of the selected standard image and the remaining image; and reducing or expanding the remaining image in accordance with the obtained extension images in a predetermined interval.
Claim 2
Independent Claim
132 words
A method for reducing and expanding images, the method comprising the steps of: acquiring a plurality of images, each image including a plurality of marker images; detecting positions of the marker images on each image; calculating marker image intervals from the detected marker image positions; selecting one of the plurality of images as a standard image; fitting a position of a remaining image to that of the standard image by a rotation and shift process, the remaining image being one of the plurality of images other than the standard image; obtaining an extension rate from the calculated marker image intervals of the marker image positions of the selected standard image and the remaining image; and reducing or expanding the remaining image in accordance with the obtained extension images in a predetermined interval.
Claim 3
Dependent Claim
21 words
The method according to claim 1, including the step of forming the marker images on the images in a predetermined interval.
Claim 4
Independent Claim
147 words
A system for reducing or expanding images, the system comprising: acquiring means for acquiring a plurality of images, each image including a plurality of marker images; detecting means for detecting positions of the marker images on each image; calculating means for calculating marker image intervals from the detected marker image positions; selecting means for selecting one of the plurality of images as a standard image; fitting means for fitting a position of a remaining image to that of the selected standard image by a rotation and shift process, the remaining image being one of the plurality of images other than the standard image; obtaining means for obtaining an extension rate from the calculated marker image intervals of the marker image positions of the selected standard image and the remaining image; and reducing/expanding means for reducing or expanding the remaining image in accordance with the obtained extension rate.
Claim 5
Independent Claim
147 words
A system for reducing or expanding images, the system comprising: acquiring means for acquiring a plurality of images, each image including a plurality of marker images; detecting means for detecting positions of the marker images on each image; calculating means for calculating marker image intervals from the detected marker image positions; selecting means for selecting one of the plurality of images as a standard image; fitting means for fitting a position of a remaining image to that of the selected standard image by a rotation and shift process, the remaining image being one of the plurality of images other than the standard image; obtaining means for obtaining an extension rate from the calculated marker image intervals of the marker image positions of the selected standard image and the remaining image; and reducing/expanding means for reducing or expanding the remaining image in accordance with the obtained extension rate.
Claim 6
Dependent Claim
20 words
The system according to claim 3, including means for forming the marker images on the images in a predetermined interval.
Claim 7
Independent Claim
109 words
A method for reducing and expanding images, the method comprising the steps of: acquiring a plurality of images, each image including a plurality of marker images; detecting positions of the marker images on each image; selecting one of the plurality of images as a standard image; fitting a position of at least one remaining image to that of the standard image by a rotation and shift process, the remaining image being one of the plurality of images other than the standard image; and obtaining an extension rate of the remaining image by calculating marker image intervals from the detected marker image positions to reduce or expand the remaining image.
Claim 8
Independent Claim
109 words
A method for reducing and expanding images, the method comprising the steps of: acquiring a plurality of images, each image including a plurality of marker images; detecting positions of the marker images on each image; selecting one of the plurality of images as a standard image; fitting a position of at least one remaining image to that of the standard image by a rotation and shift process, the remaining image being one of the plurality of images other than the standard image; and obtaining an extension rate of the remaining image by calculating marker image intervals from the detected marker image positions to reduce or expand the remaining image.
Claim 9
Dependent Claim
55 words
The method according to claim 5, wherein the obtaining step includes the steps of: calculating marker image intervals from the detected marker image positions; and acquiring a ratio of the calculated marker image intervals of the marker image positions of the selected standard image and the remaining image, the ratio corresponding to the extension rate.
Claim 10
Dependent Claim
21 words
The method according to claim 5, including the step of forming the marker images on the images in a predetermined interval.
Claim 11
Dependent Claim
48 words
The method according to claim 1, wherein the step of reducing or expanding the remaining image includes the step of reducing or expanding the remaining image when the marker image interval of the marker image positions of the standard image is different from that of the remaining image.
Claim 12
Dependent Claim
41 words
The system according to claim 3, wherein the reducing/expanding means includes means for reducing or expanding the remaining image when the marker image interval of the marker image positions of the standard image is different from that of the remaining image.
Claim 13
Dependent Claim
45 words
The method according to claim 5, wherein the step of obtaining the extension rate includes the step of reducing or expanding the remaining image when the marker interval of the marker image positions of the standard image is different from that of the remaining image.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-04-15 | 1994-10-15 | 1995-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-15 | 1998-10-15 | 1999-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-15 | 2002-10-15 | 2003-04-16 | $7700.00 | Window Closed / Lapsed |