JPS6392471U - - Google Patents
Info
- Publication number
- JPS6392471U JPS6392471U JP18767386U JP18767386U JPS6392471U JP S6392471 U JPS6392471 U JP S6392471U JP 18767386 U JP18767386 U JP 18767386U JP 18767386 U JP18767386 U JP 18767386U JP S6392471 U JPS6392471 U JP S6392471U
- Authority
- JP
- Japan
- Prior art keywords
- coefficient
- average image
- level
- set based
- noise suppression
- 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
Links
- 125000004122 cyclic group Chemical group 0.000 claims description 3
- 230000001629 suppression Effects 0.000 claims 2
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Picture Signal Circuits (AREA)
Description
第１図は本考案の一実施例を示すブロツク図、
第２図は第１図における係数設定回路の平均画像
レベルに応じた特性の変化を示す特性図、第３図
は従来例を示すブロツク図である。
主要部分の符号の説明、２，６……乗算器、５
……フレームメモリ、７……巡回型フイルタ、１
０，１２……係数設定回路。
FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a characteristic diagram showing changes in characteristics of the coefficient setting circuit shown in FIG. 1 depending on the average image level, and FIG. 3 is a block diagram showing a conventional example. Explanation of the signs of the main parts, 2, 6... Multiplier, 5
...Frame memory, 7...Cyclic filter, 1
0, 12...Coefficient setting circuit.
Claims (1)
（ＺＦ−１は１フレームの遅延に対応する単位遅
延演算子）で伝達関数が表わされるフレームメモ
リを用いた巡回型フイルタによつて構成され、原
信号と前記フレームメモリを経た信号とのレベル
差情報に基づいて係数Ｋが設定される画像の雑音
抑圧回路であつて、平均画像レベルを検出する検
出回路と、前記レベル差情報に対する係数Ｋの特
性を前記平均画像レベルに対応して複数有する係
数設定回路とを備え、前記平均画像レベルに対応
する特性に基づいて前記巡回型フイルタの係数Ｋ
を設定することを特徴とする画像の雑音抑圧回路
。 H(ZF)=(1-K)/(1-KZF -1 )
(ZF -1 is a unit delay operator corresponding to a delay of one frame) It is composed of a cyclic filter using a frame memory whose transfer function is expressed by An image noise suppression circuit in which a coefficient K is set based on information, including a detection circuit for detecting an average image level, and a coefficient having a plurality of characteristics of the coefficient K for the level difference information corresponding to the average image level. a setting circuit, the coefficient K of the cyclic filter is set based on the characteristic corresponding to the average image level.
An image noise suppression circuit characterized by setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18767386U JPS6392471U (en) | 1986-12-05 | 1986-12-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18767386U JPS6392471U (en) | 1986-12-05 | 1986-12-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6392471U true JPS6392471U (en) | 1988-06-15 |
Family
ID=31138350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18767386U Pending JPS6392471U (en) | 1986-12-05 | 1986-12-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6392471U (en) |
-
1986
- 1986-12-05 JP JP18767386U patent/JPS6392471U/ja active Pending
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