JPS60253377A - Automatic flare control method for television camera device - Google Patents

Abstract

PURPOSE:To attain the optimum flare tracking by photographing a general subject containing the resistive black and white components, changing the video signal input in a range of 1-100% by means of a lens iris and performing automatic control of flare amounts of red, green and blue colors in order to minimize the flare amount. CONSTITUTION:An iris is first closed to measure the black level when no signal is supplied. Then the iris is changed slightly to supply the black level. The flare amount is controlled so that the main level is equal to the black level set when no signal is supplied. This operation is repeated until the white level contained in a video signal reaches 100%. Then the iris is closed again, and the same operation (control of flare) is repeated until the white level reaches 60%. In the 2nd operation, the iris value is changed to a 60% video signal level that is used most frequently in case a flare correction curve is not coincident with the flare amount obtained when the iris value is changed actually in a camera operation mode. Then the flare amount is corrected again so as to secure the optimum flare correction.

Description

【発明の詳細な説明】 （技術分野） 本発明は自動調整機能を有するテレビジョンカメラにお
けるフレアの自動調整方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a method for automatically adjusting flare in a television camera having an automatic adjustment function.

（従来技術とその問題点） 従来フレアの自動調整方法はレンズに内蔵した特殊チャ
ート又は、同様な外撮特殊チャートを撮像し１本チャー
トに含まれる白レベルを検出し。(Prior art and its problems) The conventional automatic flare adjustment method involves taking an image of a special chart built into the lens or a similar special chart for outside photography, and detecting the white level included in the chart.

これを１００％映像信号レベルに調整した後、無反射黒
レベルを検出し、この黒レベルが無信号入力時の黒レベ
ルと同レベルになる様フレアを自動調整しているが下記
の問題がある。After adjusting this to 100% video signal level, the non-reflection black level is detected and the flare is automatically adjusted so that this black level is the same as the black level when no signal is input, but there are the following problems. .

（１）　レンド内蔵チャートにて自動調整を行う場合。(1) When performing automatic adjustment using the built-in chart.

レンズ系で発生するフレアが補正できない。Flare that occurs in the lens system cannot be corrected.

（２）内蔵チャート及び外撮チャート双方共、約１００
％映像信号レベルにおいて、点部分を検出しフレアの補
正を行うのであるが、アイリス礒固定であり、フレア補
正回路の補正カーブと、実際のレンズ、及び色分解光学
系にて発生するフレア量が、映像信号入力により異なる
場合があるため、実際のカメラの運用で多用する約６０
％はどの映像信号レベル入力時には本フレア自動調整後
でもそれぞれ赤色、緑色、青色信号出力にてフレアが補
正しきれな＼・場合又は補正しすぎの場合が生じ、映像
信号レベルを変化した場合。(2) Approximately 100 for both the built-in chart and the external chart
% video signal level, point portions are detected and flare is corrected, but the iris is fixed, and the amount of flare that occurs in the actual lens and color separation optical system is dependent on the correction curve of the flare correction circuit and the amount of flare that occurs in the actual lens and color separation optical system. , which may differ depending on the video signal input, is approximately 60, which is often used in actual camera operation.
% indicates that at any video signal level input, even after this flare automatic adjustment, flare may not be fully corrected or may be overcorrected for each red, green, and blue signal output, and the video signal level is changed.

それぞれのチャンネル間の７レアトラノキングがとれな
い。I can't get 7 rare tiger kings between each channel.

（目的） 本発明はこれらの欠点を解決するために、無反射黒成分
及び白成分を含む一般被写体を撮像し。(Objective) In order to solve these drawbacks, the present invention images a general subject including a non-reflective black component and a white component.

レンズアイリスにより映像信号入力な０〜１００　、％
最適なフレアトラッキングを得ることを特徴としたフレ
ア自動調整方法である。Video signal input by lens iris 0-100,%
This is an automatic flare adjustment method characterized by obtaining optimal flare tracking.

（実施例） 以下本発明の実施例を第１図を用いて説明する。(Example) Embodiments of the present invention will be described below with reference to FIG.

無反射黒成分及び白成分を含む被写体はレンズ１を通り
２色分解光学系２により赤色、緑色、青色光成分に分解
され、それぞれに対応した撮像素子３、４．５に入射す
る。この入射光は、光の乱反射により反射した色成分に
対応する信号の黒レベルがもち上がる。またこの乱反射
光のレベルは、入射光の量に比例する。An object containing a non-reflective black component and a white component passes through a lens 1 and is separated into red, green, and blue light components by a two-color separation optical system 2, and enters the corresponding image pickup devices 3, 4.5. In this incident light, the black level of the signal corresponding to the reflected color component is raised due to diffuse reflection of the light. Further, the level of this diffusely reflected light is proportional to the amount of incident light.

撮像素子３．４．５にて電気信号に変換された信号はそ
れぞれ赤色、青色、緑色の映像信号増幅器６゜７．８に
より増幅された後、それぞれのフレア補正回路９．１０
．１１に入力する。フレア補正後のそれぞれの映像信号
は黒成分の検出回路１２に入力する。The signals converted into electrical signals by the image sensor 3.4.5 are amplified by red, blue, and green video signal amplifiers 6°7.8, and then sent to the respective flare correction circuits 9.10.
．． 11. Each video signal after flare correction is input to a black component detection circuit 12.

この検出回路１２により映像信号に含まれる黒成分を検
出し、検出した量をＮΦ変換した後ＣＰＵを中枢とした
処理回路１３に入力する。処理回路１３では、ここに組
み込まれたソフトウェアのシーケンスにしたがい、レン
ズ１へのアイリス値制御信号１７を制御（アイリス値制
御）しながら、検出回路１２で検出した各チャンネルの
黒レベルが一定（基準値）になる様、赤色、緑色、青色
フレア量の制御信号１４．１５．１６を制御する。This detection circuit 12 detects the black component contained in the video signal, and after converting the detected amount into NΦ, it is input to a processing circuit 13 centered on the CPU. The processing circuit 13 controls the iris value control signal 17 to the lens 1 (iris value control) according to the sequence of the software incorporated therein, while keeping the black level of each channel detected by the detection circuit 12 constant (standard). Control signals 14, 15, and 16 for the amount of red, green, and blue flare are controlled so that the amount of flare becomes

第２図にフレア量制御ソフトウェアのシーケンスを示す
。本フローチャートは一色について述べたものであり、
実際の制御時には同じ動作を赤色。Figure 2 shows the sequence of the flare amount control software. This flowchart describes Isshiki,
The same operation is shown in red during actual control.

青色、緑色全てに対し行うものである。This is done for both blue and green.

まずアイリスをクローズし、無信号入力時の黒レベルを
測定する。その後アイリスを微少量変化させ、黒レベル
を入力し１本レベルが無信号入力時あ黒゛レベルと同レ
ベルになる様フレア量を制御する。本操作を映像信号に
含まれる白レベルが１００％になるまで行う。First, close the iris and measure the black level when no signal is input. After that, the iris is changed by a small amount, the black level is input, and the amount of flare is controlled so that the single level becomes the same level as the black level when no signal is input. This operation is performed until the white level included in the video signal reaches 100%.

その後再びアイリスをクローズし、同じ操作（フレア制
御）を白レベルが６０％になるまで行う。After that, the iris is closed again and the same operation (flare control) is performed until the white level reaches 60%.

この２回目の操作はフレア補正力ニブと、実際にカメラ
運用時にアイリス値を変化した場合のフレア量が異なる
場合２通常最も使用される６０％映像信号レベルまでア
イリス値を変化させ、ここで最適フレア補正となるよう
再度フレア量を補正するものであり、この６０％と℃・
う値は、フレア補正するカメラに応じて最適値に設定す
ればよく、任意に変更できる。又１００％としても良い
し、この２回目の操作を行わなくても良い。In this second operation, if the amount of flare differs between the flare correction power nib and the amount of flare when changing the iris value during actual camera operation, change the iris value to the 60% video signal level that is usually used most, and set the optimum value here. The amount of flare is corrected again to provide flare correction, and this 60% and °C.
The value can be set to an optimal value depending on the camera to be corrected for flare, and can be changed arbitrarily. Alternatively, it may be set to 100%, or this second operation may not be performed.

（効果） 以上本発明によるフレア自動調整方法により。(effect) The above is based on the flare automatic adjustment method according to the present invention.

下記の効果を得ることができる。The following effects can be obtained.

（１）　レンズアイリスを可変しながらフレア量を調整
するこ、とにより、正確なフレアトラッキングをとるこ
とができる。(1) Accurate flare tracking can be achieved by adjusting the amount of flare while varying the lens iris.

（２）特殊なチャートを用いることなく無反射点。(2) Non-reflective point without using a special chart.

白成分を含んだ被写体を撮像するだけで、正確にフレア
量を調整することができる。又レンズ系を含めたフレア
の補正を行うことができる。Just by capturing an image of a subject that includes a white component, the amount of flare can be adjusted accurately. Further, it is possible to correct flare including the lens system.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明のフレア自動調整を含む自動調整機能つ
きテレビジョンカメラのブロック図であり、第２図は本
発明のフレア自動調整フローチャートである。 １：レンズ、２：色分解光学系、９，１０，１１　：そ
れぞれ赤、緑、青色フレア補正回路、１２：検出回路、
１３：処理回路。FIG. 1 is a block diagram of a television camera with an automatic adjustment function including automatic flare adjustment according to the present invention, and FIG. 2 is a flowchart for automatic flare adjustment according to the present invention. 1: Lens, 2: Color separation optical system, 9, 10, 11: Red, green, and blue flare correction circuits, respectively, 12: Detection circuit,
13: Processing circuit.

Claims (1)

【特許請求の範囲】[Claims] 自動調整機能を有するカラーテレビジョンカメラにおい
て、フレアの自動調整を行う際、無反射黒成分及び白成
分を含む被写体を撮像し、レンズのアイリス値を自動的
に可変することにより入力信号レベルを変化させながら
最適フレア補正量を検出し、フレアの自動調整を行うこ
とを特徴とするテレビジョンカメラ装置におけるフレア
自動調整方法。When performing automatic flare adjustment on a color television camera with an automatic adjustment function, the input signal level is changed by capturing an image of a subject that includes a non-reflective black component and a white component, and automatically varying the lens iris value. 1. A method for automatically adjusting flare in a television camera device, characterized in that the optimum amount of flare correction is detected while adjusting the flare, and the flare is automatically adjusted.