JPS62143592A - Electronic still camera - Google Patents

Abstract

PURPOSE:To obtain a high quality image by providing a solid-state image pickup-element for a chrominance signal and a solid-state image pickup element for a chroma signal, and using an exclusive-use image pick-up element when a monochrome picture recording is executed. CONSTITUTION:At a luminance system, the reading signal of a CCD1 passes through a preamplifier 3, an FM modulator 4, an HPF5, a changing-over switch 6 and an adder 7 and is recorded at a magnetic disk sheet by a magnetic head 8. On the other hand, at a color system, the reading signal of a CCD2 is given to a color difference signal generating circuit 10 through a preamplifier 9, a color difference signal is made into a line successive signal by a changing switch 11 and derived to the adder 7 through an FM modulator 12, an LPF13 and a switch 14. A switch 15 is closed, a switch 14 is opened and a luminance signal and a chroma signal are respectively recorded by magnetic heads 8 and 16 separately. Thus, to the luminance optical system, it is unnecessary to lay color filters, etc., and the high quality still picture recording image can be obtained.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はＣＣＤ等の固体撮像素子とディスク状記録媒体
シー１とを内蔵した電子スチルカメラに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electronic still camera incorporating a solid-state image pickup device such as a CCD and a disk-shaped recording medium sheet 1.

〔発明の概要〕[Summary of the invention]

輝度信号用固体撮像素子及びりｒ−１７信号用固体撮像
素子を有し、輝度信号のめで記録するモードと、輝度信
号及びクロマ信号を多重合成して記録するモードとに切
換え得るようにし、必要に応じて白／黒、カラーの切換
えを行って画質劣化を改善したものである。It has a solid-state imaging device for luminance signals and a solid-state imaging device for R-17 signals, and is capable of switching between a mode in which luminance signals are recorded visually and a mode in which luminance signals and chroma signals are multiplexed and recorded. The deterioration in image quality is improved by switching between white/black and color depending on the situation.

〔従来の技術〕[Conventional technology]

ＣＣＤ等の固体撮像素子と磁気ディスクシーＩ・ドライ
ブ装置とを組み込んだ電子スチルカメラが知られている
（例えば特開昭５　Ｉｆ−Ｉ　（１８８８２号公報参照
）。第３図はこの種の電子スチルカメラの概念図で、通
常のフィルムカメラと同様に本体２１の全面にレンズ筒
２２が設りられ、そこに取付けられたレンズ２３を通し
て像光がＣＣＤ２４に入射される。シャッター板（図示
せず）はシャッター釦２５によって開かれ、それに同期
してＣＣＤ２４に蓄積された情報が電気信−可として読
出される。読出された映像信号番：１記録プロセス回路
で処理されてから、磁気゛ディスクカセット２６内の磁
気シー［ディスクに例えば１フイールドにつき１個のト
ラック割当てで書込まれる。なおレンズ２３の入射光は
ミラー２７．２８で反射され、後面側のファインダ２９
にも導出される。An electronic still camera incorporating a solid-state image pickup device such as a CCD and a magnetic disk drive device is known (for example, see Japanese Patent Application Laid-Open No. 18882). This is a conceptual diagram of a still camera. Like a normal film camera, a lens barrel 22 is provided on the entire surface of a main body 21, and image light is incident on a CCD 24 through a lens 23 attached to the lens barrel 22. A shutter plate (not shown) ) is opened by the shutter button 25, and in synchronization with the shutter button 25, the information stored in the CCD 24 is read out as an electric signal.The read video signal number: 1 is processed by the recording process circuit, and then transferred to the magnetic disk cassette. The magnetic sheet in 26 is written on the disk with, for example, one track assigned to each field.The incident light on the lens 23 is reflected by mirrors 27 and 28, and is reflected by the finder 29 on the rear side.
It is also derived.

このような電子スチルカメラでは、−ｉに一個のＣＣＤ
が用いられ、カラーフィルタ（ストライプフィルタ）を
使用して色分離を行い、また記録プロセス回路にてクロ
マ信号及び輝度信号を分離して得ている。また記録時に
は、輝度信号とクロマ信号とを多重合成しＣ−・木のト
ランクに記録している。In such an electronic still camera, -i has one CCD
A color filter (stripe filter) is used to perform color separation, and a recording process circuit separates and obtains a chroma signal and a luminance signal. During recording, the luminance signal and chroma signal are multiplexed and recorded on the trunk of the C-tree.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

輝度信号は、撮像部においてカラーフィルタを通った後
の信号から得られるので、帯域が狭くなっている。従っ
てモノクロームのスチル録画が行えるように構成しても
、解像度の低い画像しか得られない問題がある。The luminance signal is obtained from a signal after passing through a color filter in the imaging section, so the band is narrow. Therefore, even if the system is configured to perform monochrome still recording, there is a problem in that only images with low resolution can be obtained.

本発明はこの問題にかんがみ、モノクロームで録画する
場合に高品位の画像が得られるようにすることを目的と
する。In view of this problem, it is an object of the present invention to make it possible to obtain high-quality images when recording in monochrome.

〔問題点を解決するための手段〕[Means for solving problems]

第１図に示すように本発明の電子スチルカメラには、輝
度信号用固体撮像素子（１）とクロマ信号用固体撮像素
子（２）とを別々に設けである。As shown in FIG. 1, the electronic still camera of the present invention is provided with a solid-state image sensor (1) for luminance signals and a solid-state image sensor (2) for chroma signals separately.

切換スイッチ６．１４等を用いて、輝度信号のみで記録
するモードと、輝度信号とクロマ信号とを多重合成して
記録するモーＩＳとに切換可能に構成されている。Using a changeover switch 6, 14, etc., it is possible to switch between a mode in which only the luminance signal is recorded and a mode IS in which the luminance signal and chroma signal are multiplexed and combined and recorded.

〔作用〕[Effect]

モノクローム録画を行・）ときには、専用の撮像素子を
使用するので、高品位の画像が得られる。When performing monochrome recording, a dedicated image sensor is used, so high-quality images can be obtained.

〔実施例〕〔Example〕

第１図は本発明を適用した電子スチルカメラの記録回路
で、第２りは光学系の概略図である。FIG. 1 is a recording circuit of an electronic still camera to which the present invention is applied, and the second is a schematic diagram of the optical system.

Ｍ示のようにこの電子スチルカメラは三板式で輝度用Ｃ
ＣＤ　１及びクロマ用ＣＣＤ２を備えている。レンズ２
３を通った像光はプリズム２０で分けられてＣＣＤ　１
、ＣＣＤ２に入射される。またビューファインダの光路
にも分岐される。なお色分離用のカラーフィルタはクロ
マ用ＣＣＤ２の前面側にのみ挿入されている。As shown in M, this electronic still camera is a three-panel type with C for brightness.
Equipped with CD 1 and CCD 2 for chroma. lens 2
The image light passing through 3 is divided by prism 20 and sent to CCD 1
, are incident on the CCD2. It is also branched into the optical path of the viewfinder. Note that the color filter for color separation is inserted only on the front side of the chroma CCD 2.

輝度系では、ＣＣＤＩの読出し信号はプリアンプ３、Ｆ
ＭＭ調器４、ハ・イパスフィルタ５、切換スイッチ６、
加初芯７をｉ！Ｔｌν）、磁気ヘソｌζＢで磁気ディス
クシートに記２Ｊされる。一方、カラー系では、ＣＣＤ
２の読出しく、ｉ号はブリアンフ゛９を通ってＲ−Ｙ、
１３−Ｙの色差係号生成回路１０に与えられ、色差信号
に変換される。色差信号は切換スイッチ１１によってＩ
　ＩＩ全交互ライン順次信号にされてからＦＭ変変周周
器１２ローバスフィルり１３、スイッチＩ４をｊｍっ゛
Ｃ加算器７に導出される。なお輝度系に挿入され°（い
るバイパスフィルタ５は、ＦＭ輝度信号の下側帯域を抑
圧して、その部分にクロマ信号を挿入させるために使用
される。In the luminance system, the CCDI readout signal is sent to preamplifier 3, F
MM adjuster 4, high-pass filter 5, selector switch 6,
Kasatsushin 7 is i! Tlν) is recorded on the magnetic disk sheet by a magnetic heel lζB. On the other hand, in color systems, CCD
To read 2, the i number passes through the bridge 9 and goes to R-Y.
13-Y is applied to the color difference coefficient generation circuit 10 and converted into a color difference signal. The color difference signal is changed to I by the changeover switch 11.
After converting all alternate lines into sequential signals, the signal is outputted through the FM converter 12, low-pass filter 13, and switch I4 to the jm-c adder 7. Note that the bypass filter 5 inserted in the luminance system is used to suppress the lower band of the FM luminance signal and insert the chroma signal into that portion.

輝度信号用トラックとは別にクロマ信号用トラックを磁
気ディスクシートに形成する場合には、第１図において
点線で囲ったよ・うにスイッチ１５を通じてＦＭクロマ
信号を磁気ヘッド１６に供給する。この場合には、スイ
ッチ１５を閉じると共に、スイッチ１４を開き、輝度信
号及びクロマ信号を夫々磁気ヘッド８．１Ｇで別々のト
ランクに記録する。ＦＭ輝度信号の下側帯域の抑圧は不
用であるから、このときには切換スイッチ６をバイパス
側に接続されるように切換えれば、バイパスフィルタ５
がバイパスされて輝度信号の画質劣化は無くなる。When a chroma signal track is formed on a magnetic disk sheet separately from a luminance signal track, an FM chroma signal is supplied to the magnetic head 16 through a switch 15 as indicated by a dotted line in FIG. In this case, the switch 15 is closed, the switch 14 is opened, and the luminance signal and chroma signal are recorded on separate trunks by the magnetic head 8.1G. Since suppression of the lower band of the FM luminance signal is unnecessary, in this case, if the selector switch 6 is connected to the bypass side, the bypass filter 5
is bypassed, and there is no deterioration in the image quality of the luminance signal.

またクロマ記録用のヘソ１“１６を持たないスチルカメ
ラである場合には、スイッチ１４を開くことにより、カ
ラー多重記録からモノクローム記録に切換えることがで
きる。このときスイッチ１４と連動して切換スイッチ６
をバイパス側に接続されるように切換えれば、バイパス
フィルタ５がバイパスされ、高品質のモノク１ｍ７−１
、録画ができる。Furthermore, in the case of a still camera that does not have a navel 1" 16 for chroma recording, it is possible to switch from color multiplex recording to monochrome recording by opening the switch 14. At this time, the changeover switch 6 can be switched in conjunction with the switch 14.
If you switch it to be connected to the bypass side, the bypass filter 5 will be bypassed and the high quality monoku 1m7-1
, you can record.

〔発明の効果〕〔Effect of the invention〕

本発明は上述の如く、モノクローム録画時には、輝度専
用の固体撮像素子を用いて記録′Ｊるようにしたので、
輝度光学系にカラーフィルタ等を介在させなくてもよく
、従って高品質のメチル録画像が得られる。As mentioned above, the present invention uses a solid-state image sensor exclusively for brightness when recording monochrome images.
It is not necessary to interpose a color filter or the like in the brightness optical system, and therefore a high quality methyl recorded image can be obtained.

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

第１図は本発明の一実施例を示す電子スチルカメラの記
録回路図、第２図は光学系の概略図、第３図は従来の一
般的電子スチルカメラの概要を示す斜視図である。 なお図面に用いた符号において、 １．２−−−−一−−−−−−ＣＣＤ ３−−−−−−−−−−−−−−−−プリアンプ４−−
−−−−−−−−−−−−−　Ｆ　Ｍ変調器５−一−−
−−−−−−−−−−−−バイパスフィルタ６−＝−−
−−−−−一一−−−切換スイソチア　−−−−−−−
−−−−−−−−−加算器８−−−−−一−−−−−−
−−−−磁気ヘノド９−−−−−−−−−−一−−−プ
リアンプ１（］−−−−−−−−−−−−−−色差信号
生成回路］　１−＝−−−−−−−−−−切換スイソー
Ｊ〜１２−一〜−−−−−−−−−−−Ｆ　Ｍ変調器１
３−−−−一一−−−−−−−〜−ローパスフィルタ１
４．１５−−−−−−−−スイッチ １６−−−−−−−−−−−−−−−磁気ヘッド２６−
−−−−−−−−−−−−−磁気ディスクカセットであ
る。FIG. 1 is a recording circuit diagram of an electronic still camera showing an embodiment of the present invention, FIG. 2 is a schematic diagram of an optical system, and FIG. 3 is a perspective view showing an outline of a conventional general electronic still camera. In addition, in the symbols used in the drawings, 1.2-----1-----CCD 3--------------- Preamplifier 4--
--------------- FM modulator 5-1--
−−−−−−−−−−−Bypass filter 6−=−−
−−−−−11−−−Switching Switzerland −−−−−−−
−−−−−−−−−Adder 8−−−−−1−−−−−−
---Magnetic Henode 9-------------1---Preamplifier 1 (]---------------Color Difference Signal Generation Circuit] 1-=---- ----------Switching switch J~12-1~---------FM modulator 1
3-----11-----Low pass filter 1
4.15---------Switch 16---------Magnetic head 26-
--------------It is a magnetic disk cassette.

Claims (1)

【特許請求の範囲】 　輝度信号用固体撮像素子とクロマ信号用固体撮像素子
とを別々に設けた電子スチルカメラにおいて、 輝度信号のみで記録するモードと、輝度信号とクロマ信
号とを多重合成して記録するモードとに切換可能にした
ことを特徴とする電子スチルカメラ。[Claims] In an electronic still camera in which a solid-state image sensor for luminance signals and a solid-state image sensor for chroma signals are separately provided, there is a mode in which only luminance signals are recorded, and a mode in which luminance signals and chroma signals are multiplexed and combined. An electronic still camera characterized by being switchable between a recording mode and a recording mode.