JPH0243631U - - Google Patents
Info
- Publication number
- JPH0243631U JPH0243631U JP12212688U JP12212688U JPH0243631U JP H0243631 U JPH0243631 U JP H0243631U JP 12212688 U JP12212688 U JP 12212688U JP 12212688 U JP12212688 U JP 12212688U JP H0243631 U JPH0243631 U JP H0243631U
- Authority
- JP
- Japan
- Prior art keywords
- color temperature
- signal
- aperture
- digitized data
- video
- 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 description 4
- 230000003287 optical effect Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000003384 imaging method Methods 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 230000011664 signaling Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000004040 coloring Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
Landscapes
- Radiation Pyrometers (AREA)
- Color Television Image Signal Generators (AREA)
Description
第１図は本考案の一実施例による色温度検出回
路を備えたビデオカメラの構成を示すブロツク図
、第２図ａは光トランジスタの照度と増幅率の特
性図、第２図ｂは同トランジスタの光帯域と増幅
率の特性図である。
１……レンズ、２……絞り、３……撮像素子、
４……アナログ／デイジタル変換器、５……映像
メモリ、６……マイクロコンピユータ、７……絞
り駆動回路、８……電流制御回路、９……光トラ
ンジスタ、１０……配色回路。
Figure 1 is a block diagram showing the configuration of a video camera equipped with a color temperature detection circuit according to an embodiment of the present invention, Figure 2a is a characteristic diagram of the illumination intensity and amplification factor of a phototransistor, and Figure 2b is a diagram of the same transistor FIG. 2 is a characteristic diagram of the optical band and amplification factor of FIG. 1...Lens, 2...Aperture, 3...Image sensor,
4...Analog/digital converter, 5...Video memory, 6...Microcomputer, 7...Aperture drive circuit, 8...Current control circuit, 9...Phototransistor, 10...Coloring circuit.
Claims (1)
け、アナログ映像信号を出力する撮像手段と、前
記アナログ映像信号をデイジタル映像信号に変換
するアナログ／デイジタル変換手段と、前記デイ
ジタル映像信号を数値化データとして蓄積する映
像メモリと、該映像メモリから数値化データを読
取り、該読取つた数値化データから撮像された対
象物の周囲の輝度を判断し、輝度信号を出力する
輝度判断手段と、前記輝度信号を絞り制御信号と
して受け、前記絞りの制御を行う絞り駆動手段と
を有するビデオカメラに使用され、電流によつて
制御可能な色温度検出素子を用いて、前記撮像さ
れた対象物の周囲環境の色温度を検出する色温度
検出回路に於て、 前記輝度信号を受けて、前記色温度検出素子の
電流を制御する電流制御手段を有し、色温度の高
低のみを検出ことを特徴とするビデオカメラ用色
温度検出回路。[Claims for Utility Model Registration] Imaging means that receives an optical signal incident through a lens and an aperture and outputs an analog video signal; an analog/digital conversion means that converts the analog video signal into a digital video signal; a video memory that stores the digital video signal as digitized data, reads the digitized data from the video memory, determines the brightness around the imaged object from the read digitized data, and outputs a brightness signal. The image pickup method is performed using a color temperature detecting element that is used in a video camera and has a luminance determining means and an aperture driving means that receives the luminance signal as an aperture control signal and controls the aperture, and is controllable by an electric current. The color temperature detection circuit detects the color temperature of the surrounding environment of a target object, which includes a current control means for receiving the luminance signal and controlling the current of the color temperature detection element, and only detects high or low color temperature. A color temperature detection circuit for a video camera, which is characterized by detecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12212688U JPH0243631U (en) | 1988-09-20 | 1988-09-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12212688U JPH0243631U (en) | 1988-09-20 | 1988-09-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0243631U true JPH0243631U (en) | 1990-03-26 |
Family
ID=31369761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12212688U Pending JPH0243631U (en) | 1988-09-20 | 1988-09-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0243631U (en) |
-
1988
- 1988-09-20 JP JP12212688U patent/JPH0243631U/ja active Pending
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