JPS63316588A - Image signal processor - Google Patents
Image signal processorInfo
- Publication number
- JPS63316588A JPS63316588A JP62151199A JP15119987A JPS63316588A JP S63316588 A JPS63316588 A JP S63316588A JP 62151199 A JP62151199 A JP 62151199A JP 15119987 A JP15119987 A JP 15119987A JP S63316588 A JPS63316588 A JP S63316588A
- Authority
- JP
- Japan
- Prior art keywords
- image
- image distortion
- video signal
- correction
- signal
- 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
- 230000003287 optical effect Effects 0.000 claims abstract description 15
- 238000003384 imaging method Methods 0.000 claims description 19
- 230000015654 memory Effects 0.000 abstract description 11
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Color Television Image Signal Generators (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はカラーテレビジョン信号を発生する撮像装置の
画像歪補正に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to image distortion correction for an imaging device that generates color television signals.
本発明は、固体撮像装置等単体での映像信号のレジスト
レーション等画像歪補正が困難なカラー撮像装置におい
て、外部のデジタル信号処理装置により画像歪補正を行
うものである。The present invention corrects image distortion using an external digital signal processing device in a color imaging device, such as a solid-state imaging device, in which image distortion correction such as registration of a video signal is difficult.
従来の技術としては、３管式テレビジョンカメラでは９
例えば、特開昭４９−８７２３７号公報に示されている
ようＩｃ、色分解光学系の温度、レンズの種類、焦点距
離、焦点長、絞り値などの情報に基づき、撮像管の電子
ビーム走査を変化させる事により、上記光学系の諸値の
変化に伴うレジストレーションのずれ等の画像歪をリア
ルタイムで補正していた。As for the conventional technology, a three-tube television camera has 9
For example, as shown in Japanese Unexamined Patent Publication No. 49-87237, electron beam scanning of an image pickup tube is performed based on information such as Ic, temperature of color separation optical system, type of lens, focal length, focal length, aperture value, etc. By changing the values, image distortions such as registration deviations caused by changes in various values of the optical system can be corrected in real time.
しかし、固体撮像素子を用いた３板式テレビジョンカメ
ラでは、各固体撮像素子の個々の画素間隔は固定なので
、サイズ、リニアリティの補正は不可能であり、また各
固体撮像素子板を機構的に固定した方が、レジストレー
ション等の変動が少ないため、光学系によるレジストレ
ーションのずれ等画像歪は補正していない。映像信号を
デジタル信号に変換し、フレームメモリを用いて、テジ
タル信号処理すれば固体撮像装置でも画像歪補正は可能
であるが、現在の技術では回路規模、消費電力が大きく
、高価なので、撮像装置単体に実装することは困難であ
る。However, in a three-plate television camera that uses solid-state image sensors, the individual pixel spacing of each solid-state image sensor is fixed, so it is impossible to correct size and linearity, and each solid-state image sensor plate is mechanically fixed. Image distortion such as misregistration caused by the optical system is not corrected because this will result in fewer fluctuations in registration and the like. It is possible to correct image distortion with a solid-state imaging device by converting the video signal into a digital signal and processing the digital signal using a frame memory, but current technology requires large circuit scale, large power consumption, and is expensive, so imaging devices It is difficult to implement it alone.
なお、３管式カラーテレビジョンカメラにおいても、入
射光量による撮像管のビームベンディングによるレジス
トレーションずれは、アナログ信号処理による補正が困
難なため、補正していない。Note that even in the three-tube color television camera, misregistration due to beam bending of the image pickup tube due to the amount of incident light is difficult to correct by analog signal processing, so it is not corrected.
前述の如く、従来の固体撮像装置では、光学系の諸値の
変化に伴なう画像歪の補正を行なっておらず、実使用状
態のレジストレーションずれが大きかった。また、撮像
管を用いた撮像装置でも。As described above, conventional solid-state imaging devices do not correct image distortion caused by changes in various values of the optical system, resulting in large registration deviations in actual use. Also, for imaging devices using image pickup tubes.
光学系等の諸値変化に伴なう画像歪の補正機能を内蔵し
たものは高級機に限られており、一般的にはまだ補正し
ていない撮像装置の方が多い。Only high-end models have a built-in function to correct image distortion caused by changes in various values of the optical system, and in general, there are many imaging devices that do not yet have a correction function.
本発明はこれらの問題点を解決するため、光学系等の諸
値変化に伴なう画像歪の補正のなされていない撮像装置
でも画像歪の補正をできるようにすることを目的とする
。SUMMARY OF THE INVENTION In order to solve these problems, it is an object of the present invention to enable correction of image distortion even in an imaging apparatus that does not correct image distortion caused by changes in various values of an optical system or the like.
本発明は上記目的を達成するため、撮像装置の外部で画
像歪を補正できるように、撮像装置から映像信号と共に
２画像歪補正に必要な情報（光学系の諸値等）を外部の
画像歪補正装置に送り補正する。In order to achieve the above-mentioned object, the present invention transmits the information necessary for two-image distortion correction (various values of the optical system, etc.) together with the video signal from the imaging device so that the image distortion can be corrected outside the imaging device. Sent to correction device for correction.
また画像歪補正をする前に映像信号を録画装置に記録す
る場合も、同様に映像信号と共に画像歪補正に必要な情
報を記録し、これら再生信号を画像歪補正装置を通して
補正する。Also, when recording a video signal on a recording device before image distortion correction, information necessary for image distortion correction is similarly recorded together with the video signal, and these reproduced signals are corrected through the image distortion correction device.
以下この発明の一実施例を第１図、第２図、第３図を用
いて説明する。第１図の１は被写体で。An embodiment of the present invention will be described below with reference to FIGS. 1, 2, and 3. 1 in Figure 1 is the subject.
２は撮像装置、３と６は映像信号、４は画像歪補正用の
光学系等の諸値情報信号、５は画像歪補正装置である。2 is an imaging device, 3 and 6 are video signals, 4 is various value information signals such as an optical system for correcting image distortion, and 5 is an image distortion correction device.
第２図、第３図の１３は映像信号再生画面で、１４は赤
の映像、１５は緑の映像、１６は青の映像である。13 in FIGS. 2 and 3 is a video signal reproduction screen, 14 is a red video, 15 is a green video, and 16 is a blue video.
以下この動作について概要を説明する。An outline of this operation will be explained below.
撮像装置２から出力された映像信号は９画像歪補正装置
５内のＡ／Ｄコンバータ８でデジタル信号となりフレー
ムメモリ９に貯えられる。The video signal output from the imaging device 2 is converted into a digital signal by the A/D converter 8 in the image distortion correction device 5 and stored in the frame memory 9.
シグナルプロセッサ１２は９画像歪補正用情報信号４に
基づき、フレームメモリ９の信号を処理してフレームメ
モリ１０に貯える。フレームメモリ１０の信号は、Ｄ／
Ａコンバータ１１でアナログ信号となる。その結果第２
図のように赤の映像１４と緑の映像１５と青の映像１６
がずれていたのを第３図のように補正する。The signal processor 12 processes the signals in the frame memory 9 based on the nine image distortion correction information signals 4 and stores them in the frame memory 10 . The signal of the frame memory 10 is D/
The A converter 11 converts the signal into an analog signal. As a result, the second
As shown in the figure, a red image 14, a green image 15, and a blue image 16
Correct the misalignment as shown in Figure 3.
以下、各動作を説明する。Each operation will be explained below.
画像歪補正用情報信号４は９色分解光学系にとりつけた
温度センサの出力、ズームレンズのフォーカスリング、
ズームリング、アイリスリングにとりつげたポテンショ
メータの各出力等からなり。The image distortion correction information signal 4 is the output of the temperature sensor attached to the nine-color separation optical system, the focus ring of the zoom lens,
Consists of potentiometer outputs attached to the zoom ring and iris ring.
シグナルプロセッサ１２で、光学系等の諸値変化に起因
する画像歪を検知し、対応する補正信号を演算するため
の情報信号となる。The signal processor 12 detects image distortion caused by changes in various values of the optical system, etc., and becomes an information signal for calculating a corresponding correction signal.
次に、シグナルプロセッサ１２の動作について説明する
。Next, the operation of the signal processor 12 will be explained.
第４図がシグナルプロセッサのブロックダイアグラムで
ある。まず、シグナルプロセッサ１２では。FIG. 4 is a block diagram of the signal processor. First, in the signal processor 12.
リアルタイムの画像歪補正に先立って、撮像装置２で基
壁となる被写体１（例えばレジチャート）を撮像しなが
ら光学系等の諸値（フォーカス、ズーム比、アイリス等
）を変化させ、各々の値における画像歪量をＣＰＵ２６
で検知し、対応する各補正値（補正係数）を演算し、そ
の時の各々の光学系等の諸値（補正用情報信号４）と対
応させてＲＯＭ２４に格納しておく。Prior to real-time image distortion correction, various values of the optical system, etc. (focus, zoom ratio, iris, etc.) are changed while imaging the base wall object 1 (for example, a cash register chart) with the imaging device 2, and each value is The amount of image distortion in CPU26
, and calculate corresponding correction values (correction coefficients), which are stored in the ROM 24 in correspondence with various values (correction information signal 4) of each optical system, etc. at that time.
そして、リアルタイムの補正時は、撮像装置２より得ら
れるその時の光学系等の諸値を示す補正用情報信号４（
デジタル補正用情報信号２１）に基づき、ＣＰＵ２６で
ＲＯＭ２４に格納されている対応する補正係数を選択読
出し、同時にフレームメモリ９からデジタル化した対応
する映像信号２２を順次読出し、補正演算をしてＲＡＭ
２５に順次格納し。During real-time correction, a correction information signal 4 (
Based on the digital correction information signal 21), the CPU 26 selectively reads out the corresponding correction coefficient stored in the ROM 24, and at the same time sequentially reads out the corresponding digitized video signal 22 from the frame memory 9, performs a correction calculation, and stores it in the RAM.
25 sequentially.
フレームメモリ１０に補正されたデジタル映像信号２３
として書き込む。Digital video signal 23 corrected in frame memory 10
Write as.
第５図は、フレームメモリ９および１０内のデジタル映
像信号の格納状態を模式的に示しており、フレームメモ
リ９の画素番地ｉ、Ｊにおける映像信号Ｖｉｓｊ と
、フレームメモリ１０の対応する画素番地１＋Ｊにおけ
る映像信号ｙｉ、は、上記シグナルプロセッサ１２で説
明の如く、補正用情報信号４に基づいて各画素番地１＋
Ｊ毎に格納された補正係数〜。FIG. 5 schematically shows the storage state of digital video signals in the frame memories 9 and 10. As explained in the signal processor 12, the video signal yi at each pixel address 1+ is calculated based on the correction information signal 4.
Correction coefficient stored for each J~.
との間で、下式の演算関係を有する。has the following operational relationship.
信号処理装置は１台で、複数の撮像装置の画像歪を補正
できるので、システムとしては安価になる。Since a single signal processing device can correct image distortion of a plurality of imaging devices, the system becomes inexpensive.
また９画像歪の補正に必要な補正用情報信号を映像信号
と共に録画装置に録画しておけば、再生側で画像歪を補
正できるため、撮像装置の軽量・小型化につながる。Furthermore, if the correction information signal necessary for correcting the image distortion is recorded in the recording device together with the video signal, the image distortion can be corrected on the playback side, leading to a reduction in weight and size of the imaging device.
第１図は本発明の全体構成を示すブロック図。
第２図、第３図は映像信号再生画面、第４図はシグナル
プロセッサのブロック図、第５図はフレームメモリの模
式図である。
ｌ：被写体、２：撮像装置、３，６：映像信号。
４：補正用情報信号、５：画像歪補正装置、９．１０＝
フレームメモＩＪ、１２：シグナルプロセッサ。
、・′−一〜FIG. 1 is a block diagram showing the overall configuration of the present invention. 2 and 3 are video signal playback screens, FIG. 4 is a block diagram of the signal processor, and FIG. 5 is a schematic diagram of the frame memory. 1: Subject, 2: Imaging device, 3, 6: Video signal. 4: Correction information signal, 5: Image distortion correction device, 9.10=
Frame memo IJ, 12: Signal processor. ,・′−1～
Claims (1)
映像信号と共に出力するすくなくとも１台のカラーテレ
ビジョン撮像装置と、これら信号を直接あるいは録画再
生装置を介して入力し上記画像歪の補正に必要な情報信
号に基づき対応する上記映像信号の画像歪を補正する画
像歪補正装置にて構成される画像信号処理装置。1. At least one color television imaging device that outputs information signals necessary for correcting image distortion such as various values of the optical system along with the video signal, and inputs these signals directly or through a recording/playback device to produce the above-mentioned image. An image signal processing device comprising an image distortion correction device that corrects image distortion of the corresponding video signal based on an information signal necessary for distortion correction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62151199A JPS63316588A (en) | 1987-06-19 | 1987-06-19 | Image signal processor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62151199A JPS63316588A (en) | 1987-06-19 | 1987-06-19 | Image signal processor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63316588A true JPS63316588A (en) | 1988-12-23 |
Family
ID=15513413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62151199A Pending JPS63316588A (en) | 1987-06-19 | 1987-06-19 | Image signal processor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63316588A (en) |
-
1987
- 1987-06-19 JP JP62151199A patent/JPS63316588A/en active Pending
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