JPS63293081A - Recording medium with multirecording bar codes - Google Patents
Recording medium with multirecording bar codesInfo
- Publication number
- JPS63293081A JPS63293081A JP62128038A JP12803887A JPS63293081A JP S63293081 A JPS63293081 A JP S63293081A JP 62128038 A JP62128038 A JP 62128038A JP 12803887 A JP12803887 A JP 12803887A JP S63293081 A JPS63293081 A JP S63293081A
- Authority
- JP
- Japan
- Prior art keywords
- red
- bar code
- barcode
- colors
- recorded
- 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
- 239000003086 colorant Substances 0.000 claims abstract description 12
- 238000010521 absorption reaction Methods 0.000 abstract description 9
- 230000003595 spectral effect Effects 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 3
- 239000000976 ink Substances 0.000 description 18
- 238000007639 printing Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000000975 dye Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000004040 coloring Methods 0.000 description 2
- LKKPNUDVOYAOBB-UHFFFAOYSA-N naphthalocyanine Chemical compound N1C(N=C2C3=CC4=CC=CC=C4C=C3C(N=C3C4=CC5=CC=CC=C5C=C4C(=N4)N3)=N2)=C(C=C2C(C=CC=C2)=C2)C2=C1N=C1C2=CC3=CC=CC=C3C=C2C4=N1 LKKPNUDVOYAOBB-UHFFFAOYSA-N 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- -1 polyethylene vinyl acetate Polymers 0.000 description 2
- 239000001054 red pigment Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- MZZSDCJQCLYLLL-UHFFFAOYSA-N Secalonsaeure A Natural products COC(=O)C12OC3C(CC1=C(O)CC(C)C2O)C(=CC=C3c4ccc(O)c5C(=O)C6=C(O)CC(C)C(O)C6(Oc45)C(=O)OC)O MZZSDCJQCLYLLL-UHFFFAOYSA-N 0.000 description 1
- 235000005811 Viola adunca Nutrition 0.000 description 1
- 240000009038 Viola odorata Species 0.000 description 1
- 235000013487 Viola odorata Nutrition 0.000 description 1
- 235000002254 Viola papilionacea Nutrition 0.000 description 1
- 244000172533 Viola sororia Species 0.000 description 1
- UVCQMCCIAHQDAF-GYOQZRFSSA-N alpha-Bacterioruberin Natural products CC(=C/C=C/C=C(C)/C=C/C=C(C)/C=C/C=C(C)/C=C/C(CCC(C)(C)O)C(C)(C)O)C=CC=C(/C)C=CC=C(/C)C=CC(CCC(C)(C)O)C(C)(C)O UVCQMCCIAHQDAF-GYOQZRFSSA-N 0.000 description 1
- 239000001055 blue pigment Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- VVOLVFOSOPJKED-UHFFFAOYSA-N copper phthalocyanine Chemical compound [Cu].N=1C2=NC(C3=CC=CC=C33)=NC3=NC(C3=CC=CC=C33)=NC3=NC(C3=CC=CC=C33)=NC3=NC=1C1=CC=CC=C12 VVOLVFOSOPJKED-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 235000021388 linseed oil Nutrition 0.000 description 1
- 239000000944 linseed oil Substances 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
Landscapes
- Printing Methods (AREA)
- Duplication Or Marking (AREA)
- Credit Cards Or The Like (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は記録媒体に関する。更に詳しくは一定の記録面
に複数のバーコード情報が付与された多重記録バーコー
ドを有する記録媒体に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to recording media. More specifically, the present invention relates to a recording medium having a multi-recorded barcode in which a plurality of barcode information is added to a certain recording surface.
従来の技術
一定の長方形の面内に配置された数本の平行バーによっ
て構成されるバーコードを含むバーコードシンボル記録
方法はその読み取りの簡便さと高信頼性のゆえに生産管
理や物流の分野で広く利用されている。BACKGROUND ART Barcode symbol recording methods, which include barcodes composed of several parallel bars arranged within a fixed rectangular plane, are widely used in the fields of production management and logistics because of their ease of reading and high reliability. It's being used.
しかし、1組のバーコードシンボルで記録できる情報量
は限られているため、その限度を越えた量の情報をバー
コードで記録担体に記録したい場合は、2組またはそれ
以上のバーコードシンボルを記録担体に与えなければな
らない。However, the amount of information that can be recorded with one set of barcode symbols is limited, so if you want to record an amount of information that exceeds this limit on a record carrier using barcodes, use two or more sets of barcode symbols. shall be given to the record carrier.
しかし、上記のように2組またはそれ以上のバーコード
シンボルを記録担体に与えなければならない場合には、
バーコードシンボルが記録担体上に相当大色な面を専有
することになり、記録担体によってはそのような面を確
保で自ないこともあるし、またそれが商品等であれば意
匠上知も重大な障害となる。However, if two or more sets of barcode symbols have to be provided on the record carrier as described above,
The barcode symbol occupies a fairly large area on the record carrier, and depending on the record carrier, it may not be possible to secure such an area, and if it is a product, the design may not be considered. This is a serious obstacle.
発明が解決しようとする問題点
従来の表記法を変えずに、できるだけ小さい面で、より
多くの情報を記録できるようなバーコードを有した記録
媒体が求められている。Problems to be Solved by the Invention There is a need for a recording medium with a barcode that can record more information on as small a surface as possible without changing the conventional notation method.
問題点を解決するための手段
本発明者は前記したような問題点を解決すべく鋭意研究
を重ねた結果本発明に至った。即ち本発明は記録担体の
同一の記録面に読み取りに当って互いに干渉しない色で
多重に記録されて成るパーコードを有する記録媒体を提
供する。Means for Solving the Problems The present inventor has conducted extensive research to solve the above-mentioned problems, and as a result has arrived at the present invention. That is, the present invention provides a recording medium having parcodes recorded multiple times on the same recording surface of a record carrier in colors that do not interfere with each other during reading.
バーコードシンボルは、たとえばJAN、MW−7゜N
W−7HBX 、 GODI39等多数の表記法が定め
られており、それぞれ記録可能な情報の種類や量が異な
り。Barcode symbols are, for example, JAN, MW-7°N
A number of notation systems such as W-7HBX and GODI39 have been established, and the type and amount of information that can be recorded differs.
また記録に必要な記録担体上の専有面積や寸法も異なる
。しかし、1種類のバーコードシステムが採用されれば
、そのシステム内では一つのバーコードシンボルが占め
る長方形の面の寸法は一定である。そして、従来のバー
コードシステムではそのバーコード記録面が記録できる
情報の量も一定である。Furthermore, the area occupied and dimensions on the record carrier required for recording also differ. However, if one type of barcode system is adopted, the dimensions of the rectangular surface occupied by one barcode symbol within that system are constant. In conventional barcode systems, the amount of information that can be recorded on the barcode recording surface is also constant.
バーコードに記録されている情報は、バーコードを構成
する濃色(普通は黒色)と淡色(普通は白色)の平行パ
ーの光学的コントラストをバーコード読み取り装置の中
にある受光素子が感知し。The information recorded in a barcode is obtained by a light-receiving element in a barcode reading device sensing the optical contrast between the dark-colored (usually black) and light-colored (usually white) parallel pars that make up the barcode. .
光電変換することによってデジタル電気信号に転換され
、読み取られる。Through photoelectric conversion, it is converted into a digital electrical signal and read.
従って普通は、同じバーコード記録面に情報内容の異な
る二つ以上のバーコードが重ねて記録されていたとする
と、それぞれの情報内容に対応する画像が重なり合って
、読み取り装置は一つの情報も解読で色なくなる。Therefore, if two or more barcodes with different information content are recorded on the same barcode recording surface, the images corresponding to each information content will overlap and the reading device will not be able to decipher even a single piece of information. It loses its color.
ところで、いま、記録担体上の一つのバーコード記録面
に、たとえば第1図のAで示すような分光反射曲線を有
する青色のインクAでバーコードAを記録し、それに重
ねて第1図のBで示すような分光反射曲線を有する赤色
のインクBでバーコードAとは記録内容の異なるバーコ
ードBを記録したとすると、その結果は青色バーコード
Aと赤色バーコードBの重なり合った画像が得られる。By the way, now, barcode A is recorded on one barcode recording surface of the record carrier using blue ink A having a spectral reflection curve as shown in FIG. If barcode B, which has a different recording content than barcode A, is recorded using red ink B, which has a spectral reflection curve as shown in B, the result will be an overlapping image of blue barcode A and red barcode B. can get.
このような画像に白色光を照射し、それぞれ赤色および
青色のフィルターをかけた二つの受光素子で別々にこの
画像を走査しデコーダで解読すると、赤色フィルターを
かけた読り取シ装置は赤色のバーコードのコントラスト
を感知できないからバーコードA(青色)の記録のみを
感知し解読し、また青色フィルターをかけた読み取り装
置はバーコードB(赤色)の記録だけを感知し解読する
。When such an image is irradiated with white light, and this image is scanned separately by two light receiving elements with red and blue filters applied and decoded by a decoder, the reading device with the red filter will detect the red color. Since it cannot sense the contrast of barcodes, it senses and decodes only barcode A (blue) records, and a reading device with a blue filter senses and decodes only barcode B (red) records.
この場合、第1図のAおよびBで示した分光特性を有す
るインクAおよびインクBの色が赤色および青色フィル
ターをかけた二つの読み取り装置(受光・解読システム
)の読み取りに当って互いに実質的に干渉しなかつたこ
とによって多重記録の解読が可能になったのである。本
発明において、読み取りに当って互いに干渉しない色と
は。In this case, the colors of ink A and ink B, which have the spectral characteristics shown by A and B in FIG. By not interfering with the process, it became possible to decipher multiple records. In the present invention, what are the colors that do not interfere with each other during reading?
可視光および近赤外光領域すなわち400 nmから1
500 nmの範囲で色相互の分光吸収特性に相違があ
り、読み取り装置が選択した波長帯域でその相違を感知
で色るような2種類以上の色を意味する。このような色
の組合わせは読み取り装置がその組み合せを区別できれ
ばどんな組み合せでも良い。読み取り装置の識別しやす
さからいえば、できるだけ光吸収帯域の隔たった色の組
み合せ、たとえば赤と背縁、黄色と背紫、赤と黄緑と青
紫。visible light and near-infrared light region i.e. from 400 nm to 1
It refers to two or more colors that have different spectral absorption characteristics within a range of 500 nm, and a reading device senses the difference in the selected wavelength band. Any combination of colors may be used as long as the reading device can distinguish between the combinations. In terms of ease of identification by the reader, it is best to use color combinations with separate optical absorption bands as much as possible, such as red and dorsal edge, yellow and dorsal violet, red, yellow-green, and blue-violet.
等が適当である。また、近赤外線吸収物質たとえばアル
ミニウム拳ナフタロシアニンやクロライド(極大反射s
ssnm、極大吸収780 n!11 ) 、 4たは
次式(1)で示されるような物質(極大反射720nm
、極大吸収820 nm )を色材として用いたインク
と、可視光部に吸収を有しかつ近赤外線部に吸収を有し
ない色材を用いたインクを組み合せることもできる。etc. are appropriate. In addition, near-infrared absorbing substances such as aluminum naphthalocyanine and chloride (maximum reflection s
ssnm, maximum absorption 780n! 11), 4 or a substance as shown in the following formula (1) (maximum reflection 720 nm
, maximum absorption 820 nm) as a coloring material, and an ink using a coloring material that absorbs in the visible light region and does not absorb in the near-infrared region can also be combined.
読み取り装置は上記の例のように適当なフィルターを用
いて色を識別することもできるが、たとえば発光ダイオ
ードやレーザのように限られた波長帯域の光を放射する
光源またはフィルターを介して波長帯域を限定した光源
を用い、バーコードからの反射光をフィルターを介して
または介さずに読み取り装置で読み取ってもよい。この
場合の光源は、放射する光の波長帯域がバーコードの印
刷に用いるインクの色素の吸収波長帯域と少なくとも部
分的にオーバラップしかつ相互に干渉しないものでなけ
ればならない。A reading device can also identify colors using an appropriate filter as in the example above, but for example, a light source that emits light in a limited wavelength band, such as a light emitting diode or laser, or a filter that emits light in a limited wavelength band can identify colors. The light reflected from the barcode may be read by a reading device with or without a filter using a light source with a limited number of barcodes. In this case, the light source must be such that the wavelength band of the emitted light at least partially overlaps with the absorption wavelength band of the dye of the ink used for printing the barcode and does not interfere with each other.
バーコードシンボルに含まれるバーコード以外の1文字
等の表示は肉眼で読み取ることを考慮すれば、互いに重
ならないように、たとえばバーコードの上下または下2
段に分けて表示することが好ましい。Considering that characters other than the barcode included in a barcode symbol can be read with the naked eye, it is necessary to
It is preferable to display the information in stages.
本案のバーコードを記録担体に施すには、普通の印刷技
術、たとえば凸版、凹版、平版、スクリーン印刷等の板
組印刷、およびタイプライタ−。The proposed barcode can be applied to the record carrier using conventional printing techniques, such as letterpress, intaglio, lithography, board printing such as screen printing, and typewriter.
バーコードプリンタ等の選択的プリンティング機構によ
る印刷が使用で色る他、たとえば予めラベル等に印刷し
たものを記録担体に貼りつけてもよい。In addition to printing using a selective printing mechanism such as a barcode printer, it is also possible to print a label or the like in advance and affix it to the record carrier.
実施例
本発明の記録媒体を実施例によって更に具体的に説明す
る。EXAMPLES The recording medium of the present invention will be explained in more detail by way of examples.
実施例1
青色顔料A (CROMOPHTAL BLUE 4G
、 CよりA −G E工GY社製)および赤色顔料B
(CROMOPHTAL 5CARLETR,Cより
A−GEjY社!1iり各5部をパラフィン・ワックス
とポリエチレl酢酸ビニルの8部2混合物95部に分散
して熱転写インクAおよびBを製した。Example 1 Blue pigment A (CROMOPHTAL BLUE 4G
, C from A-GE (manufactured by E-GY Co., Ltd.) and red pigment B
Thermal transfer inks A and B were prepared by dispersing 5 parts each of CROMOPHTAL 5CARLETR, C from A-GEjY Co., Ltd. in 95 parts of an 8-part 2-part mixture of paraffin wax and polyethylene vinyl acetate.
それぞれのインクの分光反射特性を第1図に示す。The spectral reflection characteristics of each ink are shown in FIG.
次にこれ等をそれぞれ厚み6μmのポリエチレンテレフ
タレート・フィルムに約4μmの厚みに塗布した。これ
等をインクシートとして熱転写バーコードラベルプリン
タを用い、バーコードラベルの同一位置にそれぞれ異な
る数字情報を含むJANコードを印刷した。Next, each of these was coated to a thickness of about 4 μm on a polyethylene terephthalate film having a thickness of 6 μm. Using these as ink sheets and using a thermal transfer barcode label printer, JAN codes each containing different numerical information were printed at the same position on the barcode label.
多重記録バーコードを有した記録媒体が得られた。A recording medium with a multi-recorded barcode was obtained.
この多重記録バーコードに白色光を照射し、赤色フィル
ター(ラツテンム24)を通してバーコードリーダーで
読み取るとインクAで記録した情報が得られ、青色フィ
ルター(ラツテン439 )および赤外線連断フィルタ
ー(東芝工RQ 60 )を通してバーコードリーダー
で読み取るとインクBで記録した情報が得られた。When this multi-recorded barcode is irradiated with white light and read with a barcode reader through a red filter (Ratuten 24), the information recorded with ink A is obtained, and the information recorded with ink A is obtained using a blue filter (Ratuten 439) and an infrared continuous filter (Toshiba Kogyo RQ). 60) with a barcode reader, the information recorded with ink B was obtained.
5部、オヨヒ赤色顔料D (CROMOPHTAL P
ERMANENTP工NKg、CよりA−GK工GY社
製)5部をそれぞれ亜麻仁油95部に分散化してインク
C及びDを造った。5 parts, Oyohi Red Pigment D (CROMOPHTAL P
Inks C and D were prepared by dispersing 5 parts of ERMANENTP (manufactured by A-GK GY) in 95 parts of linseed oil.
それぞれのインクの分光反射特性を第2図に示す。The spectral reflection characteristics of each ink are shown in FIG.
インクCは780 nmに極大吸収、555nmに極大
反射を有し、インクDは555 nmに極大吸収を有し
700 nInより長波長側には実質的な吸収を認めな
かった。Ink C had maximum absorption at 780 nm and maximum reflection at 555 nm, and Ink D had maximum absorption at 555 nm, with no substantial absorption observed at wavelengths longer than 700 nIn.
インクCおよびDを用いて、孔版印刷の方法でアート紙
の同一位置に別々の情報を含むMW−7コードを刷り重
ね、多重記録ノ(−コードを有した記録媒体を得た。Using inks C and D, MW-7 codes containing different information were overprinted at the same position on art paper using a stencil printing method to obtain a recording medium having multiple recording (-) codes.
この多重記録バーコードはそれぞれ750 nmのLE
D光源を有する反射光検知機(1)、555nm のL
ED光源を有する反射光検知機(2)で走査してデコー
ダで解読すると1反射光検知機(1)に接続されたデコ
ーダからはインクCで印刷された情報が0反射光検知機
(2)に接続されたデコーダからはインクDで印刷され
た情報が得られた。This multiplexed barcode is each 750 nm LE
Reflected light detector (1) with D light source, L of 555 nm
When scanned by a reflected light detector (2) having an ED light source and decoded by a decoder, the information printed with ink C is 0 from the decoder connected to the reflected light detector (1).Reflected light detector (2) Information printed in ink D was obtained from a decoder connected to the ink.
発明の効果
従来のバーコードの専有面内で、従来の/(−コード表
記法を変更することなく2倍またはそれ以上の情報を含
むバーコードの付与された記録媒体が得られた。Effects of the Invention A recording medium provided with a barcode containing twice or more information within the exclusive range of the conventional barcode without changing the conventional /(- code notation system) was obtained.
第1図及び第2図は本発明の記録媒体を調製するために
使用されうる色素(染料、顔料)の組み合わせ例におけ
る反射率曲線の例を示す。
第1図又は第2図において
A : Cromophtal Blue 4GB
: Cromopht、al 5carlet RC
+ アルミニウム・ナフタロシアニン・クロライドD
: Cromophtal Permanent
Pink Eの反射率曲線を示す。FIGS. 1 and 2 show examples of reflectance curves for example combinations of dyes (dyes, pigments) that can be used to prepare the recording medium of the present invention. In Figure 1 or Figure 2, A: Chromophtal Blue 4GB
: Cromopht, al 5carlet RC
+ Aluminum naphthalocyanine chloride D
: Chromophthal Permanent
The reflectance curve of Pink E is shown.
Claims (1)
に干渉しない色で多重に記録されて成るバーコードを有
する記録媒体1. A recording medium that has a barcode recorded on the same recording surface of the record carrier in multiple colors that do not interfere with each other during reading.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62128038A JPS63293081A (en) | 1987-05-27 | 1987-05-27 | Recording medium with multirecording bar codes |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62128038A JPS63293081A (en) | 1987-05-27 | 1987-05-27 | Recording medium with multirecording bar codes |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS63293081A true JPS63293081A (en) | 1988-11-30 |
Family
ID=14974975
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62128038A Pending JPS63293081A (en) | 1987-05-27 | 1987-05-27 | Recording medium with multirecording bar codes |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS63293081A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0212487A (en) * | 1988-04-05 | 1990-01-17 | Imperial Chem Ind Plc <Ici> | Security coding of product and labelled product |
JPH0335080A (en) * | 1989-06-30 | 1991-02-15 | Pentel Kk | Composition for optical reading |
JPH0348382A (en) * | 1989-07-14 | 1991-03-01 | Pioneer Electron Corp | Method for forming code pattern, print and reader |
JPH0354685A (en) * | 1989-07-21 | 1991-03-08 | Pioneer Electron Corp | Printing code pattern and reader for the same |
JPH03111462A (en) * | 1989-09-26 | 1991-05-13 | Toyo Ink Mfg Co Ltd | Ink for bar code and its detection |
WO1992009972A1 (en) * | 1990-11-28 | 1992-06-11 | Toppan Printing Co., Ltd. | Method for recording data, and printed body printed by the method, and data recording medium, and method for reading data from data recording the medium |
WO1995016576A1 (en) * | 1993-12-13 | 1995-06-22 | Whittington, Ruth | Machine readable code presentations |
JP2005166045A (en) * | 2003-11-25 | 2005-06-23 | Xerox Corp | System for spectrally multiplexing source image to provide composite image to display composite image and to obtain color image normalized by spectrally demultiplexing the composite image |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61217887A (en) * | 1985-03-22 | 1986-09-27 | Nec Ic Microcomput Syst Ltd | Bar code system with high information density |
-
1987
- 1987-05-27 JP JP62128038A patent/JPS63293081A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61217887A (en) * | 1985-03-22 | 1986-09-27 | Nec Ic Microcomput Syst Ltd | Bar code system with high information density |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0212487A (en) * | 1988-04-05 | 1990-01-17 | Imperial Chem Ind Plc <Ici> | Security coding of product and labelled product |
JPH0335080A (en) * | 1989-06-30 | 1991-02-15 | Pentel Kk | Composition for optical reading |
JPH0348382A (en) * | 1989-07-14 | 1991-03-01 | Pioneer Electron Corp | Method for forming code pattern, print and reader |
JPH0354685A (en) * | 1989-07-21 | 1991-03-08 | Pioneer Electron Corp | Printing code pattern and reader for the same |
JPH03111462A (en) * | 1989-09-26 | 1991-05-13 | Toyo Ink Mfg Co Ltd | Ink for bar code and its detection |
WO1992009972A1 (en) * | 1990-11-28 | 1992-06-11 | Toppan Printing Co., Ltd. | Method for recording data, and printed body printed by the method, and data recording medium, and method for reading data from data recording the medium |
US5355001A (en) * | 1990-11-28 | 1994-10-11 | Toppan Printing Co., Ltd. | Method for recording data, and printed body printed by the method, and data recording medium, and method for reading data from data recording the medium |
WO1995016576A1 (en) * | 1993-12-13 | 1995-06-22 | Whittington, Ruth | Machine readable code presentations |
JP2005166045A (en) * | 2003-11-25 | 2005-06-23 | Xerox Corp | System for spectrally multiplexing source image to provide composite image to display composite image and to obtain color image normalized by spectrally demultiplexing the composite image |
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