JPH01318382A - Motion detecting device - Google Patents
Motion detecting deviceInfo
- Publication number
- JPH01318382A JPH01318382A JP63150748A JP15074888A JPH01318382A JP H01318382 A JPH01318382 A JP H01318382A JP 63150748 A JP63150748 A JP 63150748A JP 15074888 A JP15074888 A JP 15074888A JP H01318382 A JPH01318382 A JP H01318382A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- motion
- video signal
- motion information
- information
- 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
- 238000001514 detection method Methods 0.000 claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 239000000284 extract Substances 0.000 claims abstract description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000003708 edge detection Methods 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 3
- 238000000605 extraction Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、映像信号に含まれる画像の動き情報を抽出す
る動き検出装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a motion detection device that extracts motion information of an image contained in a video signal.
従来の技術
従来映像信号の動き検出方法は、映像信号における現フ
レーム画像と１フレ一ム周期前の画像との間で互いに対
応する画像の信号レベルの差の絶２ノ＼−／
対価を求め、その値の大小により動きを検出していた。2. Description of the Related Art A conventional method for detecting motion in a video signal calculates the absolute difference in signal level between the current frame image and the image one frame period before in the video signal. , movement was detected based on the magnitude of the value.
例えば、第２図は特開昭５８−１３０６８５号公報に示
されている従来の動き検出装置のブロック図を示すもの
である。同図において入力端子１に入力されたＮＴＳＣ
方式カラーテレビジョン信号ｔｔ’ｉ、１フレーム容量
のフレームメモリ１１に入力され、１フレーム前の信号
との差が、減算器１２で算出される。減算器１２の出力
には、１フレ一ム間差信号を得、これを低域通過フィル
り（以下ＬＰＦと記述）１３に入力し、絶対値回路１４
を通して出力端子５にはＮＴＳＣ信号に含まれている画
像の動き情報が得られる。For example, FIG. 2 shows a block diagram of a conventional motion detection device disclosed in Japanese Patent Laid-Open No. 58-130685. In the same figure, NTSC input to input terminal 1
The system color television signal tt'i is input to a frame memory 11 having a capacity of one frame, and a subtracter 12 calculates the difference from the signal one frame before. An inter-frame difference signal is obtained from the output of the subtracter 12, which is input to a low-pass filter (hereinafter referred to as LPF) 13, and then input to an absolute value circuit 14.
Through the output terminal 5, motion information of the image included in the NTSC signal is obtained.
発明が解決しようとする課題
しかしながら、第２図の動き検出装置の構成は、静止画
像の場合は、正しく動きなしと判定されるが、動き画像
の場合、画像のエツジ部においては、第３図に示す様に
、エツジの煩斜に応じて実際の動き量よりも大きいフレ
ームｒ１１１差信号を検出してしまい、エツジ部におけ
る感度が非常に高くなり、３・・−７
ノイズやジッタによる誤ったフレーム間差信号を検出し
、正しい動き情報を得られないという問題点を有してい
た。Problems to be Solved by the Invention However, the configuration of the motion detection device shown in FIG. 2 correctly determines that there is no motion in the case of a still image, but in the case of a moving image, the motion detection device shown in FIG. As shown in Figure 2, a frame r111 difference signal that is larger than the actual amount of movement is detected depending on the slope of the edge, and the sensitivity at the edge becomes extremely high, resulting in erroneous errors due to noise and jitter. This method has the problem of detecting inter-frame difference signals and not being able to obtain correct motion information.
本発明は、上記問題点に鑑み、映像信号におけるｌ＃像
の動き情報を正確に抽出できる動き検出装置を提供する
ものである。In view of the above problems, the present invention provides a motion detection device that can accurately extract motion information of an l# image in a video signal.
課題を解決するための手段
上記問題点を解決するために本発明の動き検出装置は映
像信号の動きに応じて画像の動き情報を発生する第１の
回路と、映像信号のエツジ部振幅情報を抽出する第２の
回路を具備し、第２の回路で得られたエツジ部の振幅に
応じて第１の回路で得られた画像の動き情報を制御する
非線形変換処理を行うことにより新たに補正された正し
い動き情報を得ることを特徴とする動き検出装置である
。Means for Solving the Problems In order to solve the above problems, the motion detection device of the present invention includes a first circuit that generates image motion information according to the movement of the video signal, and a first circuit that generates the edge part amplitude information of the video signal. It is equipped with a second circuit for extraction, and performs a new correction by performing non-linear transformation processing that controls the motion information of the image obtained by the first circuit according to the amplitude of the edge portion obtained by the second circuit. This motion detection device is characterized in that it obtains correct motion information based on the motion information.
作 用
本発明は上記した構成によって、映像信号における画像
の動き情報を正確に抽出することを可能とする。Operation The present invention enables accurate extraction of image motion information in a video signal with the above-described configuration.
実施例
以下、本発明の一実施例の動き検出装置について図面を
参照しながら説明する。Embodiment Hereinafter, a motion detection device according to an embodiment of the present invention will be described with reference to the drawings.
第１図において、動き検出回路２は例えば、従来例第２
図に示しだ動き検出回路であり、動き検出回路であれば
、いかなる構成でも差し支えない。In FIG. 1, the motion detection circuit 2 is, for example, a second conventional example.
The motion detection circuit shown in the figure is any configuration as long as it is a motion detection circuit.
入力端子１に供給された映像信号は、動き検出回路２を
通って、画像の動き情報が出力される。また、入力端子
１に供給された映像信号は、画像のエツジ部検出回路３
を通って、画像のエツジ部振１嘔情報が出力される。エ
ツジ部検出回路３は、例えば第４図の様に、入力端子１
に供給された映像信号と、１ライン遅延時間を有するメ
モリ２１を介して得られる信号との差が減算器２２で算
出され、その出力はＬＰＦ２３を通って絶対値回路２４
に入力され、出力端子２５に輝度信号成分のエツジ部振
幅情報を得る構成となっており、エツジ部検出回路３は
、画像のエツジ振幅を検出できる回路であれば、いかな
る構成でも差し支えない。エツジ部検出回路３の出力は
、非線形変換処理回路４に入力され、出力端子５には、
画像のエツジの５ノ＼−／
傾斜に応じて、実際の動き量と魯４異なる誤ったフレー
ム間差信号を検出することのない画像の動き情報が得ら
れる。なお非線形変換処理回路４とは、画像のエツジ部
振幅情報の大きさに応じて、画像の動き情報を制御する
回路でありエツジ部の振幅が大きい時、検出する動きの
情報の感度を低くしている。The video signal supplied to the input terminal 1 passes through a motion detection circuit 2, and motion information of the image is output. Further, the video signal supplied to the input terminal 1 is transmitted to the image edge detection circuit 3.
Through this, the edge vibration information of the image is output. For example, as shown in FIG. 4, the edge detection circuit 3 includes an input terminal 1
The subtracter 22 calculates the difference between the video signal supplied to the subtractor 22 and the signal obtained via the memory 21 having a one-line delay time, and the output is passed through the LPF 23 to the absolute value circuit 24.
The edge detection circuit 3 can have any configuration as long as it can detect the edge amplitude of the image. The output of the edge detection circuit 3 is input to the nonlinear conversion processing circuit 4, and the output terminal 5 is
According to the slope of the edge of the image, image motion information can be obtained that does not detect an erroneous inter-frame difference signal that differs from the actual amount of motion. The nonlinear conversion processing circuit 4 is a circuit that controls the motion information of an image according to the magnitude of the edge part amplitude information of the image, and when the amplitude of the edge part is large, the sensitivity of the detected motion information is lowered. ing.
非線形変換処理回路４はエツジ部振幅情報に対して例え
ば第６図の様な特性をもった動き検出閾値Ｒに変換され
、例えば第６図の様に動き検出回路２の出力である動き
情報に対して、動き検出閾値Ｒによシ、新たに出力に動
き情報を得ることが可能な変換特性を持った回路であり
、例えば、変換ＲＯＭ（リード・オンリー・メモリー）
で容易に実現できる。なお、動き検出閾値ＲとはＨの区
間では入力に動き情報（フレーム間差信号）があっても
、出力には動き情報をもたないと判定する閾値であり、
エツジの傾斜がきつい場合、Ｒを大きくすることによシ
、動き情報検出の感度を低くして、ノイズやジッタによ
る誤った情報を除去し６ヘーノ゛
ている。また、エツジ部振幅情報から動き検出閾値Ｒへ
の変換特性は、エツジ部振幅情報に対して、Ｒが広義の
単調増加であれば、いかなる特性をもたせても差し支え
ない。例えば第７図の様な特性も可能である。The non-linear conversion processing circuit 4 converts the edge amplitude information into a motion detection threshold value R having characteristics as shown in FIG. On the other hand, it is a circuit with a conversion characteristic that can newly obtain motion information as an output depending on the motion detection threshold R. For example, a conversion ROM (read-only memory)
This can be easily achieved. Note that the motion detection threshold R is a threshold that determines that the output does not have motion information even if there is motion information (interframe difference signal) in the input in the section H.
When the slope of the edge is steep, by increasing R, the sensitivity of motion information detection is lowered, and erroneous information due to noise and jitter is removed. Further, the conversion characteristic from the edge amplitude information to the motion detection threshold R may be any characteristic as long as R monotonically increases in a broad sense. For example, characteristics as shown in FIG. 7 are also possible.
発明の詳細
な説明したように、本発明によれば映像信号の動き情報
を、映像信号の動きに応じて動き情報を抽出する回路と
、映像信号のエツジ部振幅情報を抽出する回路で抽出さ
れた各々の情報を非線形変換処理回路に通して得ている
ため、映像信号に含まれる動き情報を正確に抽出するこ
とが可能となシその実用的効果は大きい。As described in detail, according to the present invention, motion information of a video signal is extracted by a circuit that extracts motion information according to the motion of the video signal and a circuit that extracts edge part amplitude information of the video signal. Since each piece of information is passed through a nonlinear conversion processing circuit to obtain it, it is possible to accurately extract motion information contained in a video signal, which has a great practical effect.
第１図は本発明の構成を示すブロック図、第２図は従来
の動き検出装置のブロック図、第３図は映像信号のエツ
ジ部におけるフレーム差出力を示す特性図、第４図はエ
ツジ部検出回路の一実施例の構成を示すグロック図、第
５図、第６図、第７図は非線形変換処理回路の一実施例
の特性図であ７１＼−７
る。
１・・・・・・入力端子、２・・・・・動き検出回路、
３・・・エツジ部検出回路、４・・・・・・非線形処理
回路、５゜２５・・・・出力端子、１１・・・・・１フ
レーム容量のフ ・レームメモリ、１２．２２・・・・
・減算器、１３．２３・・・ ・ＬＰＦ、１４ 、２４
・・・・絶対値回路。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名を根FIG. 1 is a block diagram showing the configuration of the present invention, FIG. 2 is a block diagram of a conventional motion detection device, FIG. 3 is a characteristic diagram showing frame difference output at the edge portion of a video signal, and FIG. 4 is a block diagram showing the edge portion of the video signal. A block diagram showing the configuration of an embodiment of the detection circuit, FIGS. 5, 6, and 7 are characteristic diagrams of an embodiment of the nonlinear conversion processing circuit. 1...Input terminal, 2...Motion detection circuit,
3... Edge detection circuit, 4... Non-linear processing circuit, 5゜25... Output terminal, 11... Frame memory with one frame capacity, 12.22...・・・
・Subtractor, 13.23... ・LPF, 14, 24
...Absolute value circuit. Name of agent: Patent attorney Toshio Nakao and one other person
Claims (1)
において、映像信号の動きに応じて、画像の動き情報を
抽出する第１の回路と、映像信号のエッジ部振幅情報を
抽出する第２の回路と、第２の回路で抽出されたエッジ
部振幅情報に対して、第１の回路で抽出された動き情報
を制御する非線形変換処理回路とを備えることにより、
映像信号の動き情報を得ることを特徴とする動き検出装
置。A device for extracting motion information of an image contained in a video signal includes a first circuit that extracts motion information of the image according to the motion of the video signal, and a second circuit that extracts edge portion amplitude information of the video signal. and a nonlinear conversion processing circuit that controls the motion information extracted by the first circuit with respect to the edge amplitude information extracted by the second circuit,
A motion detection device characterized by obtaining motion information of a video signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63150748A JPH01318382A (en) | 1988-06-17 | 1988-06-17 | Motion detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63150748A JPH01318382A (en) | 1988-06-17 | 1988-06-17 | Motion detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01318382A true JPH01318382A (en) | 1989-12-22 |
Family
ID=15503559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63150748A Pending JPH01318382A (en) | 1988-06-17 | 1988-06-17 | Motion detecting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01318382A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005117448A1 (en) * | 2004-05-31 | 2005-12-08 | Matsushita Electric Industrial Co., Ltd. | Moving object detection device and moving object detection method |
-
1988
- 1988-06-17 JP JP63150748A patent/JPH01318382A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005117448A1 (en) * | 2004-05-31 | 2005-12-08 | Matsushita Electric Industrial Co., Ltd. | Moving object detection device and moving object detection method |
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