JPH08186756A - Camera shake detector - Google Patents
Camera shake detectorInfo
- Publication number
- JPH08186756A JPH08186756A JP6339310A JP33931094A JPH08186756A JP H08186756 A JPH08186756 A JP H08186756A JP 6339310 A JP6339310 A JP 6339310A JP 33931094 A JP33931094 A JP 33931094A JP H08186756 A JPH08186756 A JP H08186756A
- Authority
- JP
- Japan
- Prior art keywords
- image
- circuit
- signal
- image signal
- unification
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/144—Movement detection
- H04N5/145—Movement estimation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
- H04N23/681—Motion detection
- H04N23/6811—Motion detection based on the image signal
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Image Analysis (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、撮像装置が撮影した画
が揺れる、いわゆる手振れを検出する画揺れ検出装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image shake detecting device for detecting a so-called hand shake, in which an image taken by an image pickup device shakes.
【０００２】[0002]
【従来の技術】カメラ一体型ビデオテープレコーダ等の
撮像装置を用いて撮影を行う場合、いわゆる手振れと呼
ばれる撮像装置（撮像素子）の揺れを回避することが不
可欠である。しかしながら実際には、手振れを完全に回
避することが困難である。このため、撮像装置には、手
振れによって生じた画の揺れを補正する画揺れ補正装置
が搭載されている。この画揺れ補正装置を適切に動作さ
せるためには、手振れの発生を正確に検出する必要があ
る。このため、撮像装置には、画揺れ補正回路と共に手
振れの発生を検出する手振れ検出装置が搭載されてい
る。2. Description of the Related Art When shooting with an image pickup device such as a video tape recorder integrated with a camera, it is essential to avoid shaking of the image pickup device (image pickup element), which is so-called camera shake. However, in reality, it is difficult to completely avoid camera shake. For this reason, the image pickup apparatus is equipped with an image shake correction device that corrects image shake caused by camera shake. In order to properly operate the image shake correction apparatus, it is necessary to accurately detect the occurrence of camera shake. For this reason, the image pickup apparatus is equipped with an image shake correction circuit and a camera shake detection device that detects the occurrence of camera shake.
【０００３】図３に、従来の手振れ検出装置のブロック
図を示す。図に示した従来の手振れ検出装置１は、メモ
リ２、相関演算回路３、そして補間回路４を備えてい
る。メモリ２は、図示しない撮像素子が撮像した像を表
す画像信号Ｓinを記憶するＲＡＭ等の記憶素子で、例え
ば、１フィールド分の画像信号を記憶する記憶容量を備
えている。相関演算回路３は、最新の画像信号Ｓinと、
メモリ２から読出される過去の（１フィールド前の）画
像信号Ｓmとを照合し、画素単位で過去の画像信号Ｓin
と最新の画像信号Ｓmとの相関関係を算出するマイクロ
プロセッサ等から構築される回路である。ここで相関関
係の算出とは、例えば、画像信号Ｓinが表す画中に含ま
れる画像信号Ｓmが表す画と一致する領域の位置を特定
する処理である。補間回路４は、相関演算回路３の演算
結果を基に、画の揺れを止める処理を実現する既知の画
揺れ補正回路５を起動するマイクロプロセッサ等から構
築される回路である。この起動を実現するための指示
は、画像信号Ｓinから画像信号Ｓmと内容が一致する画
像信号を特定する、例えば画のＸ，Ｙ座標を特定する信
号から構築される。FIG. 3 is a block diagram of a conventional camera shake detection device. The conventional camera shake detection device 1 shown in the figure includes a memory 2, a correlation calculation circuit 3, and an interpolation circuit 4. The memory 2 is a storage element such as a RAM that stores an image signal Sin representing an image picked up by an image pickup element (not shown), and has a storage capacity for storing an image signal for one field, for example. The correlation calculation circuit 3 calculates the latest image signal Sin,
The past image signal Sm read out from the memory 2 is collated with the past (one field before) image signal Sm, and the past image signal Sin
Is a circuit constructed from a microprocessor or the like that calculates the correlation between the current image signal Sm and the latest image signal Sm. Here, the calculation of the correlation is, for example, a process of specifying the position of a region that matches the image represented by the image signal Sm included in the image represented by the image signal Sin. The interpolation circuit 4 is a circuit constructed from a microprocessor or the like that activates a known image shake correction circuit 5 that realizes a process of stopping image shake based on the calculation result of the correlation calculation circuit 3. The instruction for realizing this activation is constructed from a signal that specifies an image signal whose content matches the image signal Sm from the image signal Sin, for example, a signal that specifies the X and Y coordinates of an image.
【０００４】以上の構成の手触れ検出回路１において、
画像信号Ｓinは、メモリ２に書込まれると同時に相関演
算回路３に入力される。相関演算回路３では、画像信号
Ｓinとメモリ２に記憶された画像信号Ｓmとを照合し、
画像信号Ｓmが表す画に対する画像信号Ｓinが表す画の
ずれ（揺れ）を検出し、検出結果を補間回路４に通知す
る。相関演算回路３がずれを検出した場合、補間回路４
は、画像信号の揺れを止める処理を実現する指示の内容
を生成し、画揺れ補正装置５を起動する。In the touch detection circuit 1 having the above configuration,
The image signal Sin is written into the memory 2 and at the same time input into the correlation calculation circuit 3. The correlation calculation circuit 3 collates the image signal Sin with the image signal Sm stored in the memory 2,
The shift (sway) of the image represented by the image signal Sin with respect to the image represented by the image signal Sm is detected, and the detection result is notified to the interpolation circuit 4. When the correlation calculation circuit 3 detects the deviation, the interpolation circuit 4
Generates the content of the instruction for realizing the processing for stopping the shake of the image signal, and activates the image shake correction apparatus 5.
【０００５】[0005]
【発明が解決しようとする課題】さて、図３に示したよ
うな従来の手振れ検出装置１において、相関演算回路
は、相関関係を算出する際、画素単位で最新及び過去の
画像信号を参照する。画素単位で画像信号を参照する場
合、例えば水面の細かい波や噴水を撮影した時に生じる
像の細かい変化を表す画像信号を基に算出した相関関係
が、手振れが生じた画を表す画像信号を基に算出した相
関関係とが実質的に一致してしまうという問題が生じて
いた。すなわち、像の細かい変化を表す画像信号が発生
した場合、手振れの誤検出が発生してしまうという問題
が生じていた。In the conventional camera shake detection device 1 as shown in FIG. 3, the correlation calculation circuit refers to the latest and past image signals in pixel units when calculating the correlation. . When referring to an image signal on a pixel-by-pixel basis, for example, a correlation calculated based on an image signal indicating a fine wave on the water surface or a minute change in the image that occurs when a fountain is photographed, There is a problem that the calculated correlation is substantially the same. That is, when an image signal representing a minute change in the image is generated, there is a problem that an erroneous detection of camera shake occurs.
【０００６】本発明は以上の点に着目してなされたもの
で、像の細かい変化を表す画像信号が発生しても、手振
れを誤検出する事態を回避できる手振れ検出装置を提供
する。The present invention has been made in view of the above points, and provides a camera shake detection device capable of avoiding a situation in which camera shake is erroneously detected even when an image signal representing a fine change in an image is generated.
【０００７】[0007]
【課題を解決するための手段】画を複数のブロックに分
割し、当該ブロック毎に画像信号を所望の値に単一化す
る画像ぼかし回路と、この画像ぼかし回路から出力され
る最新のフィールドの単一化信号を記憶するメモリと、
最新のフィールドの単一化信号と、メモリに記憶された
過去のフィールドの単一化信号とを照合する相関演算回
路と、相関演算回路の照合結果に基づいて、最新のフィ
ールドの単一化信号が構築する画と、過去のフィールド
の単一化信号が構築する画の一致する領域を検出する補
間回路とを備える。An image blurring circuit that divides an image into a plurality of blocks and unifies an image signal into a desired value for each block, and a latest field output from this image blurring circuit. A memory for storing the unified signal,
Correlation operation circuit that matches the latest field unification signal with the past field unification signal stored in the memory, and the latest field unification signal based on the comparison result of the correlation operation circuit And an interpolation circuit for detecting a matching area of the image constructed by the unification signal of the past field.
【０００８】[0008]
【作用】画像ぼかし回路が、画を複数のブロックに分割
し、当該ブロック毎に画像信号を所望の値に単一化し、
この単一化信号をメモリに書込むと同時に相関演算回路
に向けて出力する。相関演算回路は、入力する最新のフ
ィールドの単一化信号と、メモリから読取った過去のフ
ィールドの単一化信号とを照合する。相関演算回路は、
この照合の結果、最新の単一化信号が表す画と、過去の
単一化信号が表す画との間にずれが生じていた場合、ず
れの発生及びずれを特定する情報を補間回路に通知す
る。補間回路では、最新の画から、過去の画の一致する
領域を検出する。An image blurring circuit divides an image into a plurality of blocks and unifies the image signal into a desired value for each block.
The unified signal is written in the memory and simultaneously output to the correlation calculation circuit. The correlation calculation circuit compares the input latest field unification signal with the past field unification signal read from the memory. The correlation calculation circuit
As a result of this collation, if there is a deviation between the image represented by the latest unified signal and the image represented by the past unified signal, the interpolation circuit is notified of the occurrence of the deviation and the information specifying the deviation. To do. The interpolation circuit detects a region where the past image is coincident from the latest image.
【０００９】[0009]
【実施例】図１は、本発明の手振れ検出装置のブロック
図である。図において、先に図３に示した従来の手振れ
検出装置１と同一の構成には同一符号を付した。図３に
おいて、メモリ３及び相関演算回路３の入力側には、画
像ぼかし回路１１が設けられている。すなわち、画像信
号Ｓinは、画像ぼかし回路１１に入力され、画像ぼかし
回路１１から出力される画像信号Ｓ1が、メモリ２及び
相関演算回路３に入力される。画像ぼかし回路１１は、
画像のぼかし、例えば画のモザイク表示用の画像信号を
生成する論理回路及びソフトウェア等を搭載したマイク
ロプロセッサ等から構築される回路である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram of a camera shake detection device according to the present invention. In the figure, the same components as those of the conventional camera shake detection device 1 shown in FIG. 3 are designated by the same reference numerals. In FIG. 3, an image blurring circuit 11 is provided on the input side of the memory 3 and the correlation calculation circuit 3. That is, the image signal Sin is input to the image blurring circuit 11, and the image signal S1 output from the image blurring circuit 11 is input to the memory 2 and the correlation calculation circuit 3. The image blurring circuit 11
It is a circuit constructed from a microprocessor equipped with a logic circuit and software for generating an image signal for blurring an image, for example, a mosaic display of an image.
【００１０】図２に、本発明に係る画像ぼかし回路１１
のブロック図を示す。画像ぼかし回路１１は、ブロック
化制御回路１２、積算器１３、そしてメモリ１４を有す
る。ブロック化制御回路１２は、画像信号Ｓinによって
表される画を複数のブロックに分割するため、このブロ
ックに対応する画像信号群を特定するマイクロプロセッ
サ及び論理回路等からなる回路である。積算器１３は、
ブロック化制御回路１２により生成されたブロック毎
に、ブロックを表す画像信号の値を積算して平均値を算
出し、このブロック内の全ての画像信号の値を平均値に
設定する回路である。この平均値を算出する処理は、全
てのブロックについて個別に実施される。ここでは、積
算器１３から出力されるブロック毎に平均化された画像
信号を単一化信号を呼ぶことにする。メモリ１４は、積
算器１３から出力される画像信号、すなわち単一化信号
をＳaを記憶するＲＡＭ等からなる記憶素子である。FIG. 2 shows an image blurring circuit 11 according to the present invention.
The block diagram of is shown. The image blurring circuit 11 has a blocking control circuit 12, an integrator 13, and a memory 14. The blocking control circuit 12 is a circuit including a microprocessor and a logic circuit that specifies the image signal group corresponding to the block in order to divide the image represented by the image signal Sin into a plurality of blocks. The integrator 13 is
For each block generated by the blocking control circuit 12, the value of the image signal representing the block is integrated to calculate an average value, and the value of all the image signals in this block is set to the average value. The process of calculating the average value is individually performed for all blocks. Here, the image signal averaged for each block output from the integrator 13 is referred to as a unified signal. The memory 14 is a storage element including a RAM that stores the image signal output from the integrator 13, that is, the unified signal Sa.
【００１１】積算器１３は、画Ｆ1を表す画像信号Ｓin
が入力されると、ブロック化制御回路１２により指示さ
れるブロック領域、すなわちマトリクスＭを基に画Ｆ1
を分割する。この実施例の場合、画Ｆ1は、２０個のブ
ロックａ1〜ｄ5に分割される。積算器１３は、ブロック
毎に画像信号の積算及び平均化を行い、単一化信号Ｓa
を生成する。メモリ１４には、データ量は画像信号Ｓin
と同じであるが、ブロック毎に一定の値が設定された単
一化信号Ｓaが書込まれる。例えば、２つの山を撮影し
た画Ｆ1が積算器１３に入力された場合、山の稜線が含
まれるブロックc1,d1,c2,b3,c3,d3,b4,b5のそれぞれ
は、稜線が鮮明には表れない一定の値に設定される。The integrator 13 outputs an image signal Sin representing the image F1.
Is input, an image F1 is generated based on the block area designated by the blocking control circuit 12, that is, the matrix M.
Split. In the case of this embodiment, the picture F1 is divided into 20 blocks a1 to d5. The integrator 13 integrates and averages the image signals for each block to obtain a unified signal Sa.
Generate In the memory 14, the data amount is the image signal Sin
However, the unification signal Sa in which a constant value is set for each block is written. For example, when an image F1 obtained by photographing two mountains is input to the integrator 13, the ridge lines of the blocks c1, d1, c2, b3, c3, d3, b4, b5 including the ridge lines of the mountains are sharp. Is set to a constant value that does not appear.
【００１２】さて、本願発明に係る相関演算回路３に
は、ブロック化された画Ｆ3を表す単一化信号Ｓaが入力
される。相関演算回路３では、単一化信号Ｓaと単一化
信号Ｓamとが照合がブロック単位で実施される。ブロッ
ク単位の照合、すなわち相関関係の演算は、例えば各ブ
ロックから１画素分の画像信号（単一化信号）を抽出
し、この抽出した信号を基に、従来同様の画素単位の相
関関係を算出する、という処理により実現する。相関演
算回路３が、最新の画Ｓaに対する過去の画Ｓamのず
れ、すなわちブロックのずれを検出した場合、この検出
結果を補間回路４に通知する。このずれ補間回路４にす
る。相関演算回路３がずれを検出した場合、補間回路４
は、画像信号の補間を行うための指示内容を決定し、画
揺れ補正装置５を起動する。Now, the unification signal Sa representing the blocked image F3 is input to the correlation calculation circuit 3 according to the present invention. In the correlation calculation circuit 3, the unification signal Sa and the unification signal Sam are collated in block units. For the block-by-block collation, that is, the calculation of the correlation, for example, an image signal (unified signal) for one pixel is extracted from each block, and based on the extracted signal, the correlation in the pixel unit similar to the conventional one is calculated It is realized by the process of doing. When the correlation calculation circuit 3 detects a shift of the past image Sam with respect to the latest image Sa, that is, a block shift, it notifies the interpolation circuit 4 of the detection result. This shift interpolation circuit 4 is used. When the correlation calculation circuit 3 detects the deviation, the interpolation circuit 4
Determines the instruction content for interpolating the image signal, and activates the image shake correction apparatus 5.
【００１３】以上説明のように、画をブロック化し、ブ
ロック単位で画像信号の値を平均化（単一化）すること
により、画中の或る点ではなく面を参照して手振れの検
出を実現できる。すなわち、例えば参照した或る画素の
みが画の揺れを示し、周囲の画素が画の静止を示すよう
な場合、手振れを誤検出する事態を回避できる。As described above, the image is divided into blocks and the values of the image signal are averaged (unified) in block units, so that the shake is detected by referring to a surface rather than a certain point in the image. realizable. That is, for example, when only the referenced certain pixel indicates the image shake and the surrounding pixels indicate the still image, it is possible to avoid the situation in which the camera shake is erroneously detected.
【００１４】本発明は以上の実施例に限定されない。す
なわち、画をブロック単位に分割し、ブロック内の画像
情報を所定の値に設定する処理を実現できる構成なら
ば、例えば積算器１３に代えて、加算器やレジスタ等の
素子を組合わせて構築した回路を用いて処理を実現して
も良い。また、画を分割する際の分割数は特に限定され
ず、撮影対象となる像に合わせて、適宜選択しても良
い。The present invention is not limited to the above embodiments. That is, if the configuration is such that the image is divided into blocks and the process of setting the image information in the block to a predetermined value can be realized, for example, instead of the integrator 13, it is constructed by combining elements such as adders and registers. The processing may be realized using the circuit described above. Further, the number of divisions when dividing an image is not particularly limited, and may be appropriately selected according to the image to be captured.
【００１５】[0015]
【発明の効果】本発明の手振れ検出装置によれば、画の
微細な変化が顕著に現れないブロック単位で相関演算を
実施するため、画の微細な変化が原因で画の揺れ、すな
わち手振れを誤検出する事態を回避できる。According to the camera shake detection apparatus of the present invention, since the correlation calculation is performed in block units in which a minute change in the image does not significantly appear, the image shake, that is, the camera shake is caused by the minute change in the image. The situation of false detection can be avoided.
【図１】本発明の手振れ検出装置のブロック図。FIG. 1 is a block diagram of a camera shake detection device according to the present invention.
【図２】本発明に係る画像ぼかし回路のブロック図。FIG. 2 is a block diagram of an image blurring circuit according to the present invention.
【図３】従来の手振れ検出装置のブロック図。FIG. 3 is a block diagram of a conventional camera shake detection device.
２、１４ メモリ ３ 相関演算回路 ４ 補間回路 １１ 画像ぼかし回路 １２ ブロック化回路 １３ 積算器 2, 14 Memory 3 Correlation calculation circuit 4 Interpolation circuit 11 Image blurring circuit 12 Blocking circuit 13 Accumulator
Claims (1)
子から出力された画像信号が表す画の揺れを検出するも
のにおいて、 前記画を複数のブロックに分割し、当該ブロック毎に前
記画像信号を所望の値に単一化する画像ぼかし回路と、 前記単一化手段から出力される最新のフィールドの単一
化画像信号を記憶するメモリと、 最新のフィールドの前記単一化信号と、前記メモリに記
憶された過去のフィールドの前記単一化信号とを照合す
る相関演算回路と、 前記相関演算回路の総合結果に基づいて、前記最新のフ
ィールドの前記単一化信号が構築する前記画と、前記過
去のフィールドの前記単一化信号が構築する前記画の一
致する領域を検出する補間回路とを備えたことを特徴と
する手振れ検出装置。1. A method for detecting a shake of an image represented by an image signal output from the image sensor, which corresponds to the shake of the image sensor, wherein the image is divided into a plurality of blocks, and the image signal is divided for each block. An image blurring circuit that unifies the unification to a desired value, a memory that stores the unification image signal of the latest field output from the unification unit, the unification signal of the latest field, and A correlation operation circuit for collating the unification signal of the past field stored in the memory, and the image constructed by the unification signal of the latest field based on the total result of the correlation operation circuit, A camera shake detection device, comprising: an interpolation circuit that detects an area where the image is matched, which is constructed by the unification signal of the past field.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6339310A JPH08186756A (en) | 1994-12-28 | 1994-12-28 | Camera shake detector |
| PCT/IB1995/001117 WO1996020558A1 (en) | 1994-12-28 | 1995-12-12 | Hand-movement detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6339310A JPH08186756A (en) | 1994-12-28 | 1994-12-28 | Camera shake detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08186756A true JPH08186756A (en) | 1996-07-16 |
Family
ID=18326249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6339310A Withdrawn JPH08186756A (en) | 1994-12-28 | 1994-12-28 | Camera shake detector |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH08186756A (en) |
| WO (1) | WO1996020558A1 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR960014831B1 (en) * | 1992-12-21 | 1996-10-21 | 엘지전자 주식회사 | Auto-image stabilization device of camcoder |
-
1994
- 1994-12-28 JP JP6339310A patent/JPH08186756A/en not_active Withdrawn
-
1995
- 1995-12-12 WO PCT/IB1995/001117 patent/WO1996020558A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO1996020558A1 (en) | 1996-07-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Application deemed to be withdrawn because no request for examination was validly filed |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20020305 |