JPH0335669A - Photographic film reading method - Google Patents
Photographic film reading methodInfo
- Publication number
- JPH0335669A JPH0335669A JP17076389A JP17076389A JPH0335669A JP H0335669 A JPH0335669 A JP H0335669A JP 17076389 A JP17076389 A JP 17076389A JP 17076389 A JP17076389 A JP 17076389A JP H0335669 A JPH0335669 A JP H0335669A
- Authority
- JP
- Japan
- Prior art keywords
- film
- gradation
- characteristic
- photographic film
- conditions
- 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
- 238000000034 method Methods 0.000 title claims description 15
- 238000011161 development Methods 0.000 claims abstract description 31
- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 230000018109 developmental process Effects 0.000 description 22
- 238000012937 correction Methods 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002431 foraging effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、写真読取り装置に使用して好適な写真フィル
ム読取り方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a photographic film reading method suitable for use in a photographic reading device.
（従来技術）
従来の写真フィルム読取装置としては、特願昭６２−２
９４６４３号明細書記載のものがある。(Prior art) As a conventional photographic film reading device,
There is one described in the specification of No. 94643.
これは、第６図に示すように、写真フィルム（以下、単
にフィルムと称する）１を透過した光源２からの透過光
をレンズ系３を介し、固体撮像素子からなるラインセン
サ４で光電変換を行うようにしたものである。そしてラ
インセンサ４の出力信号は、Ａ／Ｄ変換回路５でデジタ
ル信号に変換され、デジタルクランプ回路６１階調変換
回路７マトリツクス回路８でもって、所望の映像信号に
変換されて出力される。As shown in FIG. 6, the transmitted light from a light source 2 that has passed through a photographic film (hereinafter simply referred to as film) 1 is passed through a lens system 3, and then photoelectrically converted by a line sensor 4 consisting of a solid-state image sensor. This is what I decided to do. The output signal of the line sensor 4 is converted into a digital signal by an A/D conversion circuit 5, and converted into a desired video signal by a digital clamp circuit 61, gradation conversion circuit 7, and matrix circuit 8, and output.
一方、フィルム撮影時の露光条件によらず最適な階調（
及び色再現性）が得られるように、本スキャンニング（
本読取り）に先立つプリスキャンニングによって得られ
る信号を分析し露光条件を判定し、この判定結果のデー
タとフィルム１の階調特性を表すフィルムデータとに基
づいてデジタル信号の階調変換特性（及び色補正特性）
を調整するという方法をとっている。On the other hand, the optimum gradation (
Main scanning (
The exposure conditions are determined by analyzing the signals obtained by pre-scanning prior to main reading), and the tone conversion characteristics of the digital signal (and color correction characteristics)
The method is to adjust the
ここで、９は上述したプリスキャンニングによって得ら
れた信号を記憶するためのブリスキャンンニングメモリ
、１０は予めフィルム固有のフィルムデータ（露光量と
フィルム濃度との関係をしめず階調特性）を記憶してお
くフィルムデータ回路、１１はグリスキャンニングメモ
リ９とフィルムデータ回路１０のデータに基づき階調変
換回路７、マトリックス回路８を制御し前記階調変換特
性（及び色補正特性）の調整を行うための制御回路（例
えば、ＣＰＵ）である。Here, 9 is a Briscan scanning memory for storing the signal obtained by the above-mentioned pre-scanning, and 10 is a memory that stores film-specific film data (gradation characteristics without knowing the relationship between exposure amount and film density) in advance. A film data circuit 11 to be stored controls the gradation conversion circuit 7 and matrix circuit 8 based on the data of the grease scanning memory 9 and the film data circuit 10, and adjusts the gradation conversion characteristics (and color correction characteristics). This is a control circuit (for example, a CPU) for performing the processing.
（発明が解決しようとする課題）
しかしながら、フィルムデータ回路１０のフィルムデー
タは標準の現像条件で現像した場合のデータであり、一
方、フィルム１の階調特性は、現像時間・現像温度など
の現像条件により変化するため、非標準の現像条件で現
像されたフィルムを読取った際に、グレイバランスのず
れた映像信号となってしまうという問題点があった。(Problem to be Solved by the Invention) However, the film data in the film data circuit 10 is data obtained when developed under standard development conditions, and on the other hand, the gradation characteristics of the film 1 are determined by the development time, development temperature, etc. Since it changes depending on the conditions, there is a problem in that when reading a film developed under non-standard developing conditions, a video signal with a shifted gray balance is obtained.
この問題点は、写真フィルム読取装置として、ますます
現像条件の許容範囲が広く、より多様な現像条件のフィ
ルムであっても良好に読取りがなされるものが望まれて
いる現状においては、解決しなければならない重要な課
題であった。This problem cannot be solved in the current situation where it is desired that photographic film reading devices have wider tolerances for developing conditions and be able to read films well even under a wider variety of developing conditions. This was an important issue that needed to be addressed.
本発明は、上記問題点に鑑みてなされたものであり、グ
レイバランス特性の向上させた写真フィルム読取り方法
を提供することを目的とする。The present invention has been made in view of the above problems, and an object of the present invention is to provide a photographic film reading method with improved gray balance characteristics.
（課題を解決するための手段）
本発明は上記課題を解決するためにするために、写真フ
ィルムの階調特性をフィルムデータとし、現像条件が未
知の前記写真フィルムに対してプリスキャンニ°ングを
行って現像条件を判別し、判別した現像条件と前記フィ
ルムデータとから階調変換特性を決定する写真フィルム
読取り方法であって、プリスキャンニングにより得られ
た未露光部濃度と写真フィルムのフィルムデータの未露
光部濃度との比較により前記現像条件を判別するように
した写真フィルム孕取り方法を提供するものである。(Means for Solving the Problems) In order to solve the above problems, the present invention uses the gradation characteristics of a photographic film as film data, and performs pre-scanning on the photographic film whose developing conditions are unknown. A method for reading photographic film in which the developing conditions are determined by performing the following steps, and tone conversion characteristics are determined from the determined developing conditions and the film data, the method comprises: determining the tone conversion characteristics from the determined developing conditions and the film data; The object of the present invention is to provide a method for removing a photographic film in which the developing conditions are determined by comparing the density of the unexposed part of the data.
（作用）
上記手段においては、未露光部濃度の比較により現像条
件が判別されて、写真フィルムの現像条件に合った階調
特性で階調変換される。(Function) In the above means, the developing conditions are determined by comparing the densities of the unexposed areas, and tone conversion is performed using tone characteristics that match the developing conditions of the photographic film.
（実施例） 以下写真フィルム読取り方法の一実施例を説明する。(Example) An embodiment of the photographic film reading method will be described below.
本発明方法は、フィルムの階調特性としてのフィルムデ
ータをそのまま用いずに、プリスキャンで求められた未
露光部濃度により現像条件を推定し、推定した現像条件
に応じてフィルムデータ回路のフィルムデータを選択・
修正した後に、この選択・修正されたフィルムデータを
用いて階調変換回路で階調変換を行うものである。The method of the present invention does not directly use the film data as the gradation characteristics of the film, but estimates the developing conditions based on the density of the unexposed area determined by pre-scanning, and uses the film data of the film data circuit according to the estimated developing conditions. choose·
After the correction, the selected and corrected film data is used to perform tone conversion in a tone conversion circuit.
本発明方法を適用する構成例として、大略は第６図に示
した従来例と同様であるので、この点の説明は省略する
。As an example of a configuration to which the method of the present invention is applied, it is roughly the same as the conventional example shown in FIG. 6, so a description of this point will be omitted.
最初に、フィルムホルダ１２について説明する。First, the film holder 12 will be explained.
第３図（Ａ）に示すように、フィルム１はフィルムホル
ダ１２に保持されている。フィルムホルダ１２には、正
規の読取り画角（露光部分）ＩＡに対応した第１の開口
部１２Ａと、フィルム１の周辺部（未露光部分）ＩＢの
周縁が略中央に位置するような第２の開口部１２Ｂとが
形成されている。As shown in FIG. 3(A), the film 1 is held by a film holder 12. As shown in FIG. The film holder 12 has a first opening 12A corresponding to the normal reading angle of view (exposed area) IA, and a second opening 12A in which the periphery of the peripheral area (unexposed area) IB of the film 1 is located approximately in the center. An opening 12B is formed.
上記フィルムホルダー２に保持されたフィルム１を通過
した通過光は、第３図（Ｂ）に示すように、ズーム時で
は、ラインセンサ４でフィルム１の正規の読取り画角の
１ライン分である記録部分（露光部分）Ｘ１周辺部の未
露光部分Ｙ、フィルム１を通過しない部分Ｚがそれぞれ
読取られる。As shown in FIG. 3(B), the transmitted light that has passed through the film 1 held in the film holder 2 is one line of the normal reading angle of view of the film 1 by the line sensor 4 during zooming. An unexposed portion Y around the recorded portion (exposed portion) X1 and a portion Z that does not pass through the film 1 are read respectively.
各部分ｘ、ｙ、ｚは、ラインセンサ４からの信号を同期
処理されて抽出されるように構成されている。Each portion x, y, z is configured such that the signal from the line sensor 4 is synchronously processed and extracted.
また、フィルムデータ回路１０内には、各種類（メーカ
、商品名など）のフィルムにおける複数の現像条件の階
調特性群（露光量とフィルム濃度との関係）が予め記憶
・保持されている。第４図にフィルムの現像条件に応じ
た階調特性群の一例を示す。この階調特性は未露光部濃
度ｍ１’ ２’ｍ３．・・・ｍ を含むフィルムデ
ータである。Further, in the film data circuit 10, a group of gradation characteristics (relationship between exposure amount and film density) of a plurality of development conditions for each type of film (manufacturer, product name, etc.) is stored and held in advance. FIG. 4 shows an example of a group of gradation characteristics depending on film development conditions. This gradation characteristic is the density of the unexposed area m1'2'm3. ... is film data including m.
次に、第３図（Ａ）及び第６図に示す構成例で実行され
る本読取り方法について第１図及び第４図を参照して説
明する。Next, the main reading method executed in the configuration example shown in FIG. 3(A) and FIG. 6 will be explained with reference to FIGS. 1 and 4.
最初に、フィルム１を通過しない部分２の信号強度が計
測される。フィルムホルダ１２の第２の開口部１２Ｂに
より、フィルム１を装着したまま計測できる。計測され
た信号強度に応じて、アイリス１３が適宜調整されて一
定の光量がラインセンサ４に読取られるように設定され
る。この設定により、光源２の経年変化に対する補償が
なされる（ステップ１００）。First, the signal intensity of the portion 2 that does not pass through the film 1 is measured. The second opening 12B of the film holder 12 allows measurement with the film 1 attached. According to the measured signal strength, the iris 13 is adjusted as appropriate and set so that a constant amount of light is read by the line sensor 4. This setting compensates for aging of the light source 2 (step 100).
レンズ系３をズーム調整して正規の読取り画角よりワイ
ドとした状態でプリスキャンニングを行う。第３図（Ｂ
）に示すようなフィルム１の１ライン分のＸ、Ｙ （、
Ｚ）に対応した信号が読取られる（ステップ１０１）。Pre-scanning is performed with the lens system 3 zoom-adjusted to make it wider than the normal reading angle of view. Figure 3 (B
) for one line of X, Y of film 1 as shown in (,
A signal corresponding to Z) is read (step 101).
上記未露光部分Ｙの信号からフィルム１の未露光部濃度
間が求められる。フィルム１の周辺余白部には管理文字
情報（例えば、ＤＸコード）などがあるが、この不要な
文字情報は制御回路１１により予め処理されて前記未露
光部濃度間が求められる（ステップ１０２）。From the signal of the unexposed area Y, the density of the unexposed area of the film 1 is determined. Although there is management character information (for example, DX code) in the peripheral margin of the film 1, this unnecessary character information is processed in advance by the control circuit 11 to determine the density of the unexposed area (step 102).
一方、フィルムホルダー１２に装着されたフィルム１の
種類が、例えばマニュアルスイッチなどから人力特定さ
れる（ステップ１０３）。なお、ＤＸコードから自動的
に特定するようにしても良い。そして、フィルムデータ
回路１０内に記憶・保持されている各種類のフィルムの
階調特性群から、前記人力された特定のフィルムにおけ
る複数の現像条件の階調特性群が選択され、現像条件の
未露光部濃度ｍ□’ ２’ ３．・・・ｍ が
データとして取り込まれる（ステップ１０４）。On the other hand, the type of film 1 mounted on the film holder 12 is manually specified using, for example, a manual switch (step 103). Note that it may be automatically specified from the DX code. Then, from the gradation characteristic group of each type of film stored and held in the film data circuit 10, a gradation characteristic group of a plurality of development conditions for the specific film manually selected is selected, and Exposure area density m□'2' 3. ... m is taken in as data (step 104).
前記ブリスキャンンニングにより求められた未露光部濃
度間にもとすいて、制御回路１１は現像条件を推定して
、この特定の現像条件の階調特性を前記フィルムデータ
回路１０から選択した各現像条件の階調特性群から二次
選択する。すなわち、プリスキャンニングにより求めら
れた未露光部濃度間に略等しい露光部濃度を有する階調
補正特性を二次選定する。（ステップ１０５）。The control circuit 11 estimates the development conditions based on the unexposed area density determined by the bliss scanning, and applies the gradation characteristics of this specific development condition to each development selected from the film data circuit 10. Secondary selection is made from a group of gradation characteristics of conditions. That is, a gradation correction characteristic having a substantially equal exposed area density between the unexposed area densities determined by prescanning is secondarily selected. (Step 105).
二次選択した階調特性に対応した変換特性を階調変換回
路７の特性とする（ステップ１０６）。The conversion characteristic corresponding to the secondary selected gradation characteristic is set as the characteristic of the gradation conversion circuit 7 (step 106).
前記レンズ系３をズーム調整して正規の読取り画角に戻
して、フィルム１の記録部分（露光部分）Ｘを本読取り
する（ステップ１０７）。The lens system 3 is zoom-adjusted to return to the normal reading angle of view, and the recorded portion (exposed portion) X of the film 1 is actually read (step 107).
このように、特定のフィルムの階調特性から現像条件に
応じた階調特性を選択して階調変換したため、グレイバ
ランス特性を向上させることができ、現像条件の許容範
囲が拡大して、より多様な現像条件のフィルムであって
も良好な読取りのできる写真フィルム読取り方法を提供
できる。In this way, tone conversion is performed by selecting tone characteristics according to the development conditions from the tone characteristics of a specific film, making it possible to improve gray balance characteristics, expanding the allowable range of development conditions, and improving It is possible to provide a photographic film reading method that can read films well even under various developing conditions.
次に、第２図及び第５図を参照して変形例について説明
する。Next, a modification will be described with reference to FIGS. 2 and 5.
前記実施例では、各種類のフィルムに対して複数の現像
条件の階調特性群を予め保持している必要があった。こ
のため、フィルムデータ回路１゜の記憶容量が大きくな
りやすい。本変形例は、標準現像条件の階調特性のみを
保持しておき、読取るフィルムの現像条件に応じて修正
するように構成したものである。In the embodiment described above, it was necessary to hold in advance a group of gradation characteristics under a plurality of development conditions for each type of film. For this reason, the storage capacity of the film data circuit 1° tends to become large. In this modification, only the gradation characteristics under standard development conditions are retained and modified in accordance with the development conditions of the film to be read.
前記ステップ１００〜１０２により未露光部濃度間が求
められる。ステップ１０３によりフィルムホルダー１２
に装着されたフィルム１の種類が、例えばマニュアルス
イッチなどから人力特定される。In steps 100 to 102, the density between the unexposed areas is determined. The film holder 12 is removed by step 103.
The type of film 1 attached to the camera is manually specified using, for example, a manual switch.
フィルムデータ回路１０内から、フィルムｌの標準現像
条件の階調特性及び標準現像条件の未露光部濃度用が読
出される（ステップ１０８）。標準現像条件の未露光部
濃度用と検出された未露光部濃度の差分Ｄ −Ｍ −ｍ
が算出される（ステップ１０９）。算出された差分りを
修正量として、第５図に点線で示すように、標準現像条
件の階調特性が全体としてＤだけシフトされる。シフト
修正した階調特性に応じた変換特性を階調変換回路７の
特性とする（ステップ１１０）。続いて、フィルム１の
本読取りがされる（ステップ１１１）。From within the film data circuit 10, the gradation characteristics of the standard development conditions of the film I and the unexposed area density of the standard development conditions are read out (step 108). Difference between the unexposed area density under standard development conditions and the detected unexposed area density D −M −m
is calculated (step 109). Using the calculated difference as a correction amount, the gradation characteristics under standard development conditions are shifted by D as a whole, as shown by the dotted line in FIG. The conversion characteristic corresponding to the shift-corrected tone characteristic is set as the characteristic of the tone conversion circuit 7 (step 110). Subsequently, film 1 is read (step 111).
本変形例では、特定のフィルムの標準現像条件の階調特
性をそのまま用いずに、現像条件に応じて修正してから
階調変換したため、フィルムデータ回路１０の記憶容量
を大きくすることなく、グレイバランス特性を向上させ
ることができる。In this modified example, the gradation characteristics of the standard development conditions of a specific film are not used as they are, but are modified according to the development conditions before gradation conversion is performed. Balance characteristics can be improved.
（発明の効果）
以上詳述したように、本発明によれば、未露光部濃度の
比較により現像条件を判別して、フィルムの階調特性と
してのフィルムデータをそのまま用いずに現像条件に応
じて選定・修正してから階調変換したため、グレイバラ
ンス特性を向上させることができ、良好な読取りができ
る。(Effects of the Invention) As described in detail above, according to the present invention, the developing conditions are determined by comparing the density of the unexposed area, and the developing conditions are adjusted according to the developing conditions without directly using the film data as the gradation characteristics of the film. Since the gradation is converted after selecting and correcting the image, the gray balance characteristics can be improved and good reading can be achieved.
第１図は本発明になる写真読取り方法の一実施例を示す
フローチャート、第２図は変形例を示すフローチャート
、第３図（Ａ）及び（Ｂ）はプリスキャンニングを説明
する図、第４図は現像条件に応じた階調特性群の一例を
示す図、第５図は標準現像条件に応じた階調特性の一例
を示す図、第６図は一般的な写真フィルム読取り装置を
示す図である。FIG. 1 is a flowchart showing an embodiment of the photo reading method according to the present invention, FIG. 2 is a flowchart showing a modified example, FIGS. 3A and 3B are diagrams explaining pre-scanning, and FIG. The figure shows an example of a group of gradation characteristics depending on development conditions, FIG. 5 shows an example of gradation characteristics according to standard development conditions, and FIG. 6 shows a general photographic film reading device. It is.
Claims (1)
件が未知の前記写真フィルムに対してプリスキャンニン
グを行って現像条件を判別し、判別した現像条件と前記
フィルムデータとから階調変換特性を決定する写真フィ
ルム読取り方法であって、 プリスキャンニングにより得られた未露光部濃度と写真
フィルムのフィルムデータの未露光部濃度との比較によ
り前記現像条件を判別するようにしたことを特徴とする
写真フィルム読取り方法。[Scope of Claims] The gradation characteristics of a photographic film are taken as film data, the development conditions are determined by performing prescanning on the photographic film whose development conditions are unknown, and the development conditions are determined based on the determined development conditions and the film data. A photographic film reading method for determining gradation conversion characteristics, wherein the developing conditions are determined by comparing the unexposed area density obtained by pre-scanning with the unexposed area density of film data of the photographic film. A photographic film reading method characterized by the following.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17076389A JPH0335669A (en) | 1989-06-30 | 1989-06-30 | Photographic film reading method |
| US07/545,420 US5060061A (en) | 1989-06-30 | 1990-06-27 | Method of reading an image recorded in a photographic film tone characteristic correcting method in reproducing an image recorded in a photographic film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17076389A JPH0335669A (en) | 1989-06-30 | 1989-06-30 | Photographic film reading method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0335669A true JPH0335669A (en) | 1991-02-15 |
Family
ID=15910926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17076389A Pending JPH0335669A (en) | 1989-06-30 | 1989-06-30 | Photographic film reading method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0335669A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4221323A1 (en) * | 1991-07-30 | 1993-02-11 | Yamatoya Shokai | SOUND CONVERSION PROCESS FOR FADED PHOTO COLOR TEMPLATES |
| US5902167A (en) * | 1997-09-09 | 1999-05-11 | Sonic Bites, Llc | Sound-transmitting amusement device and method |
| US6115477A (en) * | 1995-01-23 | 2000-09-05 | Sonic Bites, Llc | Denta-mandibular sound-transmitting system |
| US8774435B2 (en) | 2008-07-23 | 2014-07-08 | Asius Technologies, Llc | Audio device, system and method |
-
1989
- 1989-06-30 JP JP17076389A patent/JPH0335669A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4221323A1 (en) * | 1991-07-30 | 1993-02-11 | Yamatoya Shokai | SOUND CONVERSION PROCESS FOR FADED PHOTO COLOR TEMPLATES |
| DE4221323C2 (en) * | 1991-07-30 | 2000-06-21 | Yamatoya Shokai | Tone conversion process for faded photo color templates |
| US6115477A (en) * | 1995-01-23 | 2000-09-05 | Sonic Bites, Llc | Denta-mandibular sound-transmitting system |
| US5902167A (en) * | 1997-09-09 | 1999-05-11 | Sonic Bites, Llc | Sound-transmitting amusement device and method |
| US8774435B2 (en) | 2008-07-23 | 2014-07-08 | Asius Technologies, Llc | Audio device, system and method |
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