Patent EP0281271A2 successfully refreshed from Google Patents.
EP0281271A2
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EP
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Image processing method and apparatus
Assignee: Hitachi Ltd
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Filing: 1988-02-17
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Granted: —
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Expires: 2008-02-17
Abstract
Abstract The present invention relates to a picture processing apparatus. In particular, a picture processing apparatus suitable for executing the contour tracking of an image comprises a picture element address computation section (100) including adders (101, 102) and registers (103 to 112), a direction code computation section (200) for coding the transition of the picture element address as a direction on the screen, a computation control section (300) for controlling the picture element address computation section in accordance with a request for neighbor access of a current contour picture element for detecting a next contour picture element, a request for transition from the current contour picture element address to the next contour picture element address, and a request for transition to a start point in the neighbor access, all of these requests being supplied from a system processor (2). Thereby, it becomes possible to increase the speed of contour tracking and arbitrarily set the size of a mask for contour tracking. An image processing apparatus capable of realizing coarse contour tracking is thus disclosed.
Inventors
- 👤 Hiroshi Takenaga
- 👤 Yoshiyuki Okuyama
- 👤 Yoshiki Kobayashi
- 👤 Kazuyoshi Asada
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-10 02:01
CPC Classifications
G; G06; G06T; G06T7/00; G06T7/10; G06T7/12; G06T2200/00; G06T2200/28
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
135 words
An image processing method comprising the steps of: inputting from a system processor (2) a request for neighbor access of a current contour picture element for detecting a next contour picture element, a request for transition from the current contour picture element address to the next contour picture element address, and a request for transition to a start point in said neighbor access; performing, in a picture element address computation section (100), computation processing of an address of picture element whereto the system processor should gain access with respect to an input image stored in an image memory (3); and coding, in a direction code computation section (200) and in parallel to said computation processing performed in said picture element address computation section, transition of a picture element address as a direction on a screen.
Claim 2
Dependent Claim
135 words
An image processing method comprising the steps of: inputting from a system processor (2) a request for neighbor access of a current contour picture element for detecting a next contour picture element, a request for transition from the current contour picture element address to the next contour picture element address, and a request for transition to a start point in said neighbor access; performing, in a picture element address computation section (100), computation processing of an address of picture element whereto the system processor should gain access with respect to an input image stored in an image memory (3); and coding, in a direction code computation section (200) and in parallel to said computation processing performed in said picture element address computation section, transition of a picture element address as a direction on a screen.
Claim 3
Dependent Claim
142 words
An image processing apparatus comprising: a picture element address computation section (100) for computing an address of picture element whereto a system processor should gain access with respect to an input image stored in an image memory (3); a direction code computation section (200) for coding transition of a picture element address supplied from said picture element address computation section as a direction on a screen; and a computation control section (300) for controlling said picture element address computation section in accordance with a request for neighbor access of a current contour picture element for detecting a next contour picture element, a request for transition from the current contour picture element address to the next contour picture element address, and a request for transition to a start point in said neighbor access, all of said requests being supplied from said system processor.
Claim 4
Dependent Claim
142 words
An image processing apparatus comprising: a picture element address computation section (100) for computing an address of picture element whereto a system processor should gain access with respect to an input image stored in an image memory (3); a direction code computation section (200) for coding transition of a picture element address supplied from said picture element address computation section as a direction on a screen; and a computation control section (300) for controlling said picture element address computation section in accordance with a request for neighbor access of a current contour picture element for detecting a next contour picture element, a request for transition from the current contour picture element address to the next contour picture element address, and a request for transition to a start point in said neighbor access, all of said requests being supplied from said system processor.
Claim 5
Dependent Claim
60 words
An image processing apparatus according to Claim 2, wherein said picture element address computation section (100) includes adders (101, 102), a first register group (103, 108, 104, 105, 109, 110) for holding addition constants, and a second register group (106, 111, 107, 112) for holding addition results, and the addition constants held in said first register group are programmably set.
Claim 6
Dependent Claim
57 words
An image processing apparatus according to Claim 2, wherein said picture element address computation section (100) comprises adders (101, 102), a first register group (103, 108, 104, 105, 109, 110) for holding addition constants, and a second register group (106, 111, 107, 112) for holding addition results for each of X address generation and Y address generation.
Claim 7
Dependent Claim
29 words
An image processing apparatus according to Claim 3, wherein the addition constants held in said first register group (103, 108) comprise an address of a contour tracking start point.
Claim 8
Dependent Claim
41 words
An image processing apparatus according to Claim 3, wherein the addition constants held in said first register group (104, 105, 109, 110) comprise direction codes representing displacement components in X and Y directions with respect to a center picture element. E
Claim 9
Dependent Claim
25 words
An image processing apparatus according to Claim 3, wherein the addition results held in said second register group comprise the current contour picture element address.
Claim 10
Dependent Claim
32 words
An image processing apparatus according to Claim 3, wherein the. addition results held in said second register group comprise an address of a picture element neighboring with the current contour picture element.
Claim 11
Dependent Claim
106 words
In an image processing system including a TV camera (5), an image processing processor (6), an image memory (3), a system processor (2) and an image contour tracking apparatus, an image processing system comprising: an image contour tracking apparatus (1) comprising a picture element address computation section (100) and a direction code computation section (200) in parallel; said picture element address computation section (100) computing an address of a picture element whereto the system processor should gain access; and said direction code computation section (200) coding transition of a picture element address supplied from said picture element address computation section as a direction on a screen.
Claim 12
Dependent Claim
106 words
In an image processing system including a TV camera (5), an image processing processor (6), an image memory (3), a system processor (2) and an image contour tracking apparatus, an image processing system comprising: an image contour tracking apparatus (1) comprising a picture element address computation section (100) and a direction code computation section (200) in parallel; said picture element address computation section (100) computing an address of a picture element whereto the system processor should gain access; and said direction code computation section (200) coding transition of a picture element address supplied from said picture element address computation section as a direction on a screen.
References Cited (Backward Citations)
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