JPS60177A - Method for measuring density of picture - Google Patents
Method for measuring density of pictureInfo
- Publication number
- JPS60177A JPS60177A JP58107447A JP10744783A JPS60177A JP S60177 A JPS60177 A JP S60177A JP 58107447 A JP58107447 A JP 58107447A JP 10744783 A JP10744783 A JP 10744783A JP S60177 A JPS60177 A JP S60177A
- Authority
- JP
- Japan
- Prior art keywords
- information
- image
- picture
- brightness
- recording
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は１画像を記録する為に必要な適正光量を測定
する画像濃度測定方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image density measuring method for measuring the appropriate amount of light required to record one image.
映像信号により画面上に画像を表示し、この画面上の画
像を記録体に記録するシステムにおいては、映像信号が
適切であるのに回路の特性上温度上Ａ等により、画面上
の画像が映像信号どうりに出力されず明るさが変化する
ことがある。このため、従来画像を記録するにあたって
その画像を構成する画像情報の明るさの差や。In a system that displays an image on a screen using a video signal and records the image on the screen on a recording medium, even though the video signal is appropriate, due to circuit characteristics such as temperature A, the image on the screen is The signal may not be output as expected and the brightness may change. For this reason, when conventionally recording an image, there is a difference in the brightness of the image information that makes up the image.
その絶対値を的確に記録するために、その画像のもつ総
光量を測定したり、また既知の明るさのものを画像の記
録の直前もしくは同時に、基準光として記録媒体に与え
、それを測定することによって適正な光量を定め、これ
に基づいて画面上の画像を記録体に記録していた。In order to accurately record the absolute value, it is necessary to measure the total amount of light that the image has, or to apply a reference light of known brightness to the recording medium immediately before or at the same time as recording the image, and then measure it. By doing this, the appropriate amount of light was determined, and based on this, the image on the screen was recorded on the recording medium.
ところで画像のもつ総光量を測定する場合は、画像を記
録する適正なコントラスト値が得られず、また基準光と
して記録媒体に与え、それを測定する場合は特定の基準
光を発生させるための機構を別に必要とする等の問題点
があった。By the way, when measuring the total amount of light that an image has, it is difficult to obtain an appropriate contrast value for recording the image, and when measuring it by applying it to the recording medium as a reference light, there is a need for a mechanism to generate a specific reference light. There were problems such as the need for a separate
この発明はこのような実情を背景としてなされたもので
、画像の記録に適切な′Ｘ、量の測定が特別な機構を必
要とせず簡単かつ確実にできる画像濃度測定方法を提供
することを目的としている。The present invention was made against the background of the above circumstances, and an object of the present invention is to provide an image density measuring method that can easily and reliably measure the amount of 'X' suitable for recording an image without requiring a special mechanism. It is said that
この発明は前記目的を達成するために、画像を記録する
システムにおいて、画像情報の白黒情報を表わす光の強
さを計測し、この輝度を基準として画像記録に必要な適
正光量を測定するようになしたことを特徴としている。In order to achieve the above object, the present invention measures the intensity of light representing black and white information of image information in an image recording system, and measures the appropriate amount of light necessary for image recording based on this luminance. It is characterized by what it has done.
以下、この発明の一実施例を添付図面に基づいて説［Ｊ
＋する。An embodiment of the present invention will be described below based on the attached drawings [J
+
第１図はＣＲＴ上の画像をフィルムに記録する一実施例
を示す全体の構成図、第２図はＣＲＴ上の輝度を示す説
明図、第３図は黒情報の輝度を計測する測光装置の回路
図である。Figure 1 is an overall configuration diagram showing an example of recording an image on a CRT onto a film, Figure 2 is an explanatory diagram showing the brightness on a CRT, and Figure 3 is a photometric device that measures the brightness of black information. It is a circuit diagram.
画像記録システムにおいて映像信号発生装置１からの映
像信号が、ＣＲＴ２に与えられ、このＣＲＴ２の蛍光画
面３は入射電子ビームの強度に応じて、発光して可視像
を表示する。これは蛍光画面３上に電子線４を水平方向
に走査し、水平方向の同期信号５により折り返し、これ
を上方から下方に反復して走査し蛍光画面３を発光して
いく、そして、蛍光画面３の下方に達すると垂直方向の
同期信号によって折り返して上方に移行し同様な走査を
して次の映像信号を出力し、映像信号発生装置ｌからの
画像情報がＣＲＴ２の蛍光画面３上に表わされるように
なっている。In the image recording system, a video signal from a video signal generator 1 is applied to a CRT 2, and a fluorescent screen 3 of the CRT 2 emits light in accordance with the intensity of the incident electron beam to display a visible image. This involves horizontally scanning an electron beam 4 on a fluorescent screen 3, turning it back in response to a horizontal synchronization signal 5, and scanning this repeatedly from top to bottom to make the fluorescent screen 3 emit light. When it reaches the lower part of 3, it turns around according to the vertical synchronization signal, moves upward, performs a similar scan, and outputs the next video signal, and the image information from the video signal generator 1 is displayed on the fluorescent screen 3 of the CRT 2. It is now possible to
ところでこの蛍光画面３上の周囲には、所定幅のポーチ
６が形成されており、この内側に画像情報が表わされる
。すなわち、第２図に示すように走査の折り返し点の水
平同期信号５の間には、フロントポーチ６ａとバックポ
ーチ６ｂがあり、さらにこのフロントポーチ６ａとバッ
クポーチ６ｂ内に表示画面７が形成されている。そして
この実施例ではこの表示画面７の中央部に画像端＃８を
表わしてぃ′る。By the way, a pouch 6 of a predetermined width is formed around the fluorescent screen 3, and image information is displayed inside this pouch 6. That is, as shown in FIG. 2, there is a front porch 6a and a back porch 6b between the horizontal synchronizing signal 5 at the turning point of scanning, and a display screen 7 is formed within the front porch 6a and the back porch 6b. ing. In this embodiment, an image end #8 is displayed at the center of the display screen 7.
ところで前記ポーチ６は所定の表示画面７を設定するた
めの黒情報を表わす部分であり、この部分はわずかなが
ら発光しており、映像信号の表現し得る最とも黒い黒情
報を表わす部分と同一レベルの輝度である。すなわちブ
ライトネスおよびコントラスト調整によって、ポ・−チ
ロはわずかながら゛発光している。１ｓ光装置９は蛍光
画面３上のこの定まった位置のポーチ６の輝度を計測す
るように、所定の位置に向けて配設され、これによりポ
ーチ６の輝度を測定する。By the way, the pouch 6 is a part that represents black information for setting a predetermined display screen 7, and this part emits light, albeit slightly, at the same level as the part that represents the blackest black information that can be expressed by the video signal. The brightness is . In other words, depending on the brightness and contrast adjustment, Pochiro is slightly emitting light. The 1s light device 9 is disposed facing a predetermined position so as to measure the brightness of the pouch 6 at this predetermined position on the fluorescent screen 3, thereby measuring the brightness of the pouch 6.
そしてこの輝度を基準信号として画像測定装置ｌＯで蛍
光画面３上の画像から記録に必要な適正光量を測定し、
さらにこの画像情報の黒情報を本来の光のない黒情報に
戻し、これにより画像を記録装ｇｉｌｌで記録体１２に
記録する。Then, using this luminance as a reference signal, the image measuring device IO measures the appropriate amount of light necessary for recording from the image on the fluorescent screen 3,
Further, the black information of this image information is returned to the original black information without light, and thereby the image is recorded on the recording body 12 by the recording device gill.
また、この実施例では前記表示画面７内の映像情報内の
黒情報を表わす部分１３は、前記ポーチ６よりも輝度を
やや高く設定されている。この黒情報を表わす部分１３
は中央部の映像情報８を鮮明にするために設けられたも
のであり、この部分１３を測定し、これを基準とするこ
ともできる。すなわち、この黒情報を表わす部分１３も
蛍光画面３上の所定の位置に設定されており、この部分
１３あるいは前記ポーチ６を測定して基準とするかは、
自由に選択可能である。たとえば、映像情報８を鮮明に
する部分１３がポーチ６の輝度と略同程度であることが
事前に明らかな場合は、この部分１３を測定し、一方明
らかでない場合はあるいは前記部分１３が設定されてい
ない場合はポーチ６を測定してこの部分の輝度を基準と
する。Further, in this embodiment, a portion 13 representing black information in the video information on the display screen 7 is set to have a brightness slightly higher than that of the pouch 6. Part 13 representing this black information
is provided to make the image information 8 in the central part clearer, and this part 13 can also be measured and used as a reference. That is, the portion 13 representing this black information is also set at a predetermined position on the fluorescent screen 3, and whether to measure this portion 13 or the pouch 6 as a reference depends on
Freely selectable. For example, if it is clear in advance that the part 13 that makes the video information 8 clear is approximately the same brightness as the pouch 6, this part 13 is measured; if it is not clear, or the part 13 is set. If not, measure the pouch 6 and use the brightness of this part as the reference.
業記測光装置９はＭＳ３図のように構成されている。す
なわち受光素子１４でポーチ６あるいは映像情報８の背
景となる部分１３等の黒情報からの受けた光を電気信号
に変換し、これをオペアンプ１５で増幅して出力し、こ
れを黒情報の基準信号とする。The photometric device 9 is constructed as shown in Fig. MS3. That is, the light receiving element 14 converts the light received from the black information such as the pouch 6 or the background portion 13 of the video information 8 into an electrical signal, which is amplified and outputted by the operational amplifier 15, and this is used as the standard for the black information. Signal.
この発明は前記のように、画像情報の白黒情報を表わす
光の強さ、すなわち総光量に関係のない絶対光量を計測
し、その輝度を基準として画像記録に必要な適正光量を
測定するようになしたので、適切なコントラスト値を得
ることができる。また輝度の基準となる黒情報は画像情
報に常に包含されており、特定の基準光を発生させるた
めの機構を必要としないなどの利点がある。As described above, this invention measures the intensity of light representing black and white information of image information, that is, the absolute amount of light that is unrelated to the total amount of light, and measures the appropriate amount of light necessary for image recording based on the brightness. As a result, an appropriate contrast value can be obtained. Further, black information, which serves as a reference for brightness, is always included in the image information, and there is an advantage that a mechanism for generating a specific reference light is not required.
第１図はＣＲＴ上の画像を記録体に記録する一実施例を
示す全体の構成図、第２図はＣＲＴ上の輝度を示す説明
図、第３図は黒情報の輝度を計測する測光装置の回路図
である。
１・・・映像信号発生装置 ２・・・ＣＲＴ ３・・・
蛍光画面 ６・・・ポーチ ７・・・表示画面 ８・・
・映像情報 ９・・・測光装置 １０・・・画像測定装
置第１図
第２図
哨藺Figure 1 is an overall configuration diagram showing an example of recording an image on a CRT onto a recording medium, Figure 2 is an explanatory diagram showing the brightness on a CRT, and Figure 3 is a photometric device that measures the brightness of black information. FIG. 1... Video signal generator 2... CRT 3...
Fluorescent screen 6... Pouch 7... Display screen 8...
・Video information 9...Photometering device 10...Image measuring device Figure 1 Figure 2 Monitor
Claims (1)
像情報の白黒情報を表わす光の強さを計測し、この輝度
を基準として画像記録に必要な適正光量を測定する画像
濃度測定方法。In a system that records images on a screen, an image density measurement method that measures the intensity of light representing black and white image information on the screen, and measures the appropriate amount of light necessary for image recording based on this brightness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58107447A JPS60177A (en) | 1983-06-15 | 1983-06-15 | Method for measuring density of picture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58107447A JPS60177A (en) | 1983-06-15 | 1983-06-15 | Method for measuring density of picture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60177A true JPS60177A (en) | 1985-01-05 |
Family
ID=14459379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58107447A Pending JPS60177A (en) | 1983-06-15 | 1983-06-15 | Method for measuring density of picture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60177A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6113781A (en) * | 1984-06-28 | 1986-01-22 | Shimadzu Corp | Photographing device of crt picture |
| JPS61173590A (en) * | 1985-01-29 | 1986-08-05 | Fuji Photo Film Co Ltd | Automatic calibrating circuit of monitor device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5560386A (en) * | 1978-10-26 | 1980-05-07 | Philips Nv | Display screen photographic camera |
| JPS5598781A (en) * | 1979-01-23 | 1980-07-28 | Tokyo Shibaura Electric Co | Display image photograph unit |
| JPS58104582A (en) * | 1981-11-26 | 1983-06-22 | シ−メンス・アクチエンゲゼルシヤフト | Television monitoring method and device |
| JPS58196782A (en) * | 1982-05-11 | 1983-11-16 | Kowa Co | Photographing device for crt screen |
-
1983
- 1983-06-15 JP JP58107447A patent/JPS60177A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5560386A (en) * | 1978-10-26 | 1980-05-07 | Philips Nv | Display screen photographic camera |
| JPS5598781A (en) * | 1979-01-23 | 1980-07-28 | Tokyo Shibaura Electric Co | Display image photograph unit |
| JPS58104582A (en) * | 1981-11-26 | 1983-06-22 | シ−メンス・アクチエンゲゼルシヤフト | Television monitoring method and device |
| JPS58196782A (en) * | 1982-05-11 | 1983-11-16 | Kowa Co | Photographing device for crt screen |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6113781A (en) * | 1984-06-28 | 1986-01-22 | Shimadzu Corp | Photographing device of crt picture |
| JPS61173590A (en) * | 1985-01-29 | 1986-08-05 | Fuji Photo Film Co Ltd | Automatic calibrating circuit of monitor device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20180261189A1 (en) | Apparatus and method for preparing, storing, transmitting and displaying images | |
| US3835245A (en) | Information modification in image analysis systems employing line scanning | |
| JP4623843B2 (en) | 3D image input device | |
| JPS6055924A (en) | Automatic light control apparatus of endoscope | |
| Roehrig et al. | Performance tests and quality control of cathode ray tube displays | |
| CA2035240C (en) | Apparatus for recovering a film signal from a television video signal | |
| JPS60177A (en) | Method for measuring density of picture | |
| US4755875A (en) | Telecine apparatus including an electro-optical image transducer illuminated by a bias light source | |
| US2801385A (en) | Television apparatus | |
| JPH0654352A (en) | Testing device for picture display device | |
| KR910007703B1 (en) | Measuring method for blooming for a solid photographing element and the apparatus of the same | |
| JP2534638B2 (en) | Printing monitoring method and apparatus | |
| JP6925489B2 (en) | Chart device | |
| JPS58196782A (en) | Photographing device for crt screen | |
| KR19980703091A (en) | Device for observation of objects | |
| JPH07226862A (en) | Method and device for correcting shading in projection image display device | |
| JPS60140381A (en) | Method and apparatus for automatically correcting electro-optic conversion characteristic | |
| JPS602713Y2 (en) | Video equipment | |
| JPS5923684A (en) | Focus adjusting method of projector | |
| Goldstein | Gray scale shifts in ultrasound displays | |
| JPS593327A (en) | Detector of light emission intensity distribution | |
| CLASS | CLASS 348, TELEVISION | |
| Boor | Rapid film-density evaluation | |
| JPS584311Y2 (en) | Eizou Kirokusouchi | |
| JP2742424B2 (en) | Image shooting and projection equipment |