JPS647775A - Defocus device - Google Patents

Defocus device

Info

Publication number
JPS647775A
JPS647775A JP16126887A JP16126887A JPS647775A JP S647775 A JPS647775 A JP S647775A JP 16126887 A JP16126887 A JP 16126887A JP 16126887 A JP16126887 A JP 16126887A JP S647775 A JPS647775 A JP S647775A
Authority
JP
Japan
Prior art keywords
signal
directional filter
processing
defocus
delayed
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.)
Granted
Application number
JP16126887A
Other languages
Japanese (ja)
Other versions
JP2572067B2 (en
Inventor
Masaki Hayashi
Shigeru Shimoda
Yasuaki Kanetsugu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Japan Broadcasting Corp
Original Assignee
Nippon Hoso Kyokai NHK
Japan Broadcasting Corp
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
Application filed by Nippon Hoso Kyokai NHK, Japan Broadcasting Corp filed Critical Nippon Hoso Kyokai NHK
Priority to JP62161268A priority Critical patent/JP2572067B2/en
Publication of JPS647775A publication Critical patent/JPS647775A/en
Application granted granted Critical
Publication of JP2572067B2 publication Critical patent/JP2572067B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Picture Signal Circuits (AREA)
  • Studio Circuits (AREA)

Abstract

PURPOSE:To attain the processing of defocus natural and symmetrical in the left-and-right directions and up-and-down directions by making a recursive digital filter having a linear phase characteristic function in at least one of the vertical direction, horizontal direction, and inclined direction. CONSTITUTION:Image data A is made a delayed signal B by a delay element 5. The signal B is substracted from a signal A which is not delayed in a subtractor 6, and a signal C is outputted. An adder 7 adds a signal D and the signal C with each other to generate a signal E, so that a signal F is obtained from a multiplier 9, then the arithmetic operation to average moving in the horizontal direction is executed to obtain a signal G. Similar action is achieved in a vertical directional filter part 2. Inclinded directional filter part 3 has two processing parts that function in the rightward inclined direction and the leftward inclined direction, which are set in suitable values in order to obtain well balance between the naturalness of defocussing and the magnitude of moire. A defocus amount control part 27 achieves the overall control, and turns switches 4A, 4B to (b)-side in a small amount range and to the (a)-side when the amount is large in order to execute the inclined directional filter processing.
JP62161268A 1987-06-30 1987-06-30 Defocus device Expired - Lifetime JP2572067B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62161268A JP2572067B2 (en) 1987-06-30 1987-06-30 Defocus device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62161268A JP2572067B2 (en) 1987-06-30 1987-06-30 Defocus device

Publications (2)

Publication Number Publication Date
JPS647775A true JPS647775A (en) 1989-01-11
JP2572067B2 JP2572067B2 (en) 1997-01-16

Family

ID=15731877

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62161268A Expired - Lifetime JP2572067B2 (en) 1987-06-30 1987-06-30 Defocus device

Country Status (1)

Country Link
JP (1) JP2572067B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02294170A (en) * 1989-04-12 1990-12-05 Grass Valley Group Inc:The Iterative image bleeding effect equipment

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5885673A (en) * 1981-11-18 1983-05-23 Matsushita Electric Ind Co Ltd Defocusing effect device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5885673A (en) * 1981-11-18 1983-05-23 Matsushita Electric Ind Co Ltd Defocusing effect device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02294170A (en) * 1989-04-12 1990-12-05 Grass Valley Group Inc:The Iterative image bleeding effect equipment

Also Published As

Publication number Publication date
JP2572067B2 (en) 1997-01-16

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