JPS57157370A - Dot extraction processing system in closed loop - Google Patents

Dot extraction processing system in closed loop

Info

Publication number
JPS57157370A
JPS57157370A JP4342581A JP4342581A JPS57157370A JP S57157370 A JPS57157370 A JP S57157370A JP 4342581 A JP4342581 A JP 4342581A JP 4342581 A JP4342581 A JP 4342581A JP S57157370 A JPS57157370 A JP S57157370A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
closed loop
point
extracted
a2
a1
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP4342581A
Inventor
Koji Mikawa
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T1/00General purpose image data processing
    • G06T1/0007Image acquisition

Abstract

PURPOSE:To exactly extract a dot in a closed loop, by extracting 2 points on the closed loop to which one of X and Y coordinate values is equal, by prescribed search centering around each previous extracted point, and deciding whether other point on the closed loop exists or not on its connecting line. CONSTITUTION:X and Y coordinate values x0, y0 of an indicated point P on a display 11 are set to registers 13X, 13Y, x0 is added by ''1'' in order in the positive and negative directions, contents of a picture memory 12 are read out by 1 dot each, and the first closed loop extracted points A1, A1' are obtained respectively. Subsequently, searchesI, II shown in the figure B are executed centering around A1 and A1', a new point coordinate extracting memory 18 is accessed by its address information, A2 and A2' to which the Y coordinate value (y+a) is equal are derived, and when both of them are on the closed loop, whether other point on the closed loop exists between both of them or not is checked, and for instance, when a point Bu1 on the closed loop is extracted, logical ''1'' is decoded by a decoder 16, gates G1, G2 are turned on, and the coordinates of Bu1 are stacked in a memory 17. Also, when Bu2 is extracted, all dots between A2 and Bu1, and Bu2 and A2' are extracted as dots in the closed loop.
JP4342581A 1981-03-25 1981-03-25 Dot extraction processing system in closed loop Pending JPS57157370A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4342581A JPS57157370A (en) 1981-03-25 1981-03-25 Dot extraction processing system in closed loop

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4342581A JPS57157370A (en) 1981-03-25 1981-03-25 Dot extraction processing system in closed loop

Publications (1)

Publication Number Publication Date
JPS57157370A true true JPS57157370A (en) 1982-09-28

Family

ID=12663339

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4342581A Pending JPS57157370A (en) 1981-03-25 1981-03-25 Dot extraction processing system in closed loop

Country Status (1)

Country Link
JP (1) JPS57157370A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58225474A (en) * 1982-06-25 1983-12-27 Yokogawa Hokushin Electric Corp Recognizing method of closed region
JPS62289783A (en) * 1986-03-07 1987-12-16 Yokogawa Hewlett Packard Ltd Raster path generating device
JPH0259873A (en) * 1988-08-26 1990-02-28 Canon Inc Image processor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58225474A (en) * 1982-06-25 1983-12-27 Yokogawa Hokushin Electric Corp Recognizing method of closed region
JPS62289783A (en) * 1986-03-07 1987-12-16 Yokogawa Hewlett Packard Ltd Raster path generating device
JPH0259873A (en) * 1988-08-26 1990-02-28 Canon Inc Image processor
JP2710350B2 (en) * 1988-08-26 1998-02-10 キヤノン株式会社 The image processing method of an image processing apparatus and an image processing apparatus

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