JPH05168610A - Fingerprint detecting method - Google Patents
Fingerprint detecting methodInfo
- Publication number
- JPH05168610A JPH05168610A JP3338340A JP33834091A JPH05168610A JP H05168610 A JPH05168610 A JP H05168610A JP 3338340 A JP3338340 A JP 3338340A JP 33834091 A JP33834091 A JP 33834091A JP H05168610 A JPH05168610 A JP H05168610A
- Authority
- JP
- Japan
- Prior art keywords
- fingerprint
- image information
- stored
- light
- thermal image
- 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.)
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Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、鑑識技術分野におい
て、指紋を含む検体から潜在指紋を光学的に検出する技
術に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for optically detecting a latent fingerprint from a specimen including a fingerprint in the field of forensic technology.
【0002】[0002]
【従来の技術】現在の潜在指紋検出方法には、アルミニ
ウムや石松子などの微粉末を指紋成分中の水分または脂
肪分に付着させて検体と粉末との色調差を利用する固体
法、指紋成分中に含まれるアミノ酸や塩分に化学薬品を
反応させ呈色させる液体法、指紋成分中の脂肪分にヨウ
素ガスを反応させ呈色させる方法や国際公開W085−
00963号公報に示されるようなシアノアクリレート
ガスで指紋隆線部を固着化させ、さらには白色化させる
方法などに代表される気体法がある。2. Description of the Related Art Current latent fingerprint detection methods include a solid-state method that uses a color difference between a specimen and powder by adhering fine powder such as aluminum or Ishimatsuko to water or fat in the fingerprint component, and a fingerprint component. A liquid method in which a chemical is reacted with an amino acid or salt contained therein to give a color, a method in which a fat content in a fingerprint component is reacted with iodine gas to give a color, and International Publication W085-
There is a gas method typified by a method of fixing the fingerprint ridges with a cyanoacrylate gas as shown in Japanese Patent Publication No.
【0003】多くの検体についてはこれらの方法を用い
ることにより検出が可能であるが、表面に複雑な模様の
ある紙幣、新建材のように表面に高分子被膜が施されて
いて指紋の付着しにくいもの、あるいは感熱紙や水溶紙
など熱や水に弱い特殊紙など最近では従来法の適用だけ
では検出の難しい例が多く見られるようになってきた。Although many specimens can be detected by using these methods, bills with a complicated pattern on the surface and polymer coating on the surface like new building materials have fingerprints attached. Recently, there have been many cases in which it is difficult to detect only by applying conventional methods, such as difficult materials or special paper such as heat-sensitive paper or water-soluble paper which is weak against heat and water.
【0004】以上の欠点を補う方法として、高出力、単
色光照射により生ずる蛍光を利用する方法、通常はレー
ザ法が、例えば次の文献(1)に提案されている。 (1) E.R.Menzel:Identifica
tion News,International A
ssociation for Identifica
tion,Vol.33,No.9(Septembe
r 1983) このレーザ法では、指紋隆線からの発光を強調するため
に蛍光性を有する色素溶液に接触させたり、化学処理に
より蛍光性を増すなどの処理を行う。これらは、一般に
前処理または事前処理と呼ばれており、例えば特開昭6
1−154537号公報に見られるような手法や、次の
文献(2)、(3)に示されるような化学反応を利用し
た方法などが提案されている。 (2) D.W.Herod,E.R.Menze
l:″Laser Detection of Lat
ent Fingerprints:Ninhydri
n Followed by Zinc Chlori
de″,Journal of Forensic S
cience,JFSCA,Vol.27,No.3,
p513−518(July 1982) (3) V.R.Salares,C.R.Eves,
P.R.Carey:″On the Detecti
on of Fingerprint by Lase
r Exited Luminescence″,Fo
rensic Science Internatio
nal,Vol.14,p229(1979) しかしながら上記のような検出手法では、粉末を直接検
体に塗布するため必要以上に粉末が付着し潜在指紋が壊
されたり、検出液を直接検体にかけるため潜在指紋が流
されたりする恐れがあるので、検体に非接触で指紋を検
出できる手法の実現が望まれている。加えて、粉末や検
出液を塗布する作業において作業者の個人差により検出
される指紋の品質に差があるのも事実である。As a method of compensating for the above-mentioned drawbacks, a method of utilizing fluorescence generated by high-power, monochromatic light irradiation, usually a laser method, has been proposed, for example, in the following document (1). (1) E. R. Menzel: Identitya
Tion News, International A
association for Identitya
section, Vol. 33, No. 9 (Septembe
r 1983) In this laser method, in order to emphasize the light emission from the fingerprint ridges, a treatment is carried out such as contact with a dye solution having fluorescence or chemical treatment to increase fluorescence. These are generally called pretreatments or pretreatments.
Methods such as those disclosed in Japanese Patent Publication No. 1-154537 and methods utilizing chemical reactions as shown in the following documents (2) and (3) have been proposed. (2) D. W. Herod, E .; R. Menze
l: "Laser Detection of Lat
ent Fingerprints: Ninhydr
n Followed by Zinc Chlori
de ″, Journal of Forensic S
science, JFSCA, Vol. 27, No. Three
p513-518 (July 1982) (3) V.P. R. Sarares, C.I. R. Eves,
P. R. Carey: "On the Detecti
on of Fingerprint by Laser
r Exited Luminescence ", Fo
rensic Science Internet
nal, Vol. 14, p229 (1979) However, in the detection method as described above, the powder is directly applied to the sample, so that the powder adheres more than necessary and the latent fingerprint is destroyed. Therefore, it is desired to realize a method capable of detecting a fingerprint without contacting a sample. In addition, it is also true that there is a difference in the quality of fingerprints detected due to individual differences among workers in the work of applying powder or detection liquid.
【0005】また鑑識技術以外の分野において、例えば
特開昭60−213854号公報や特開昭61−952
21号公報に示されるような赤外線を用いて構造物やタ
イルなどの中の欠陥を測定する方法なども教示されてい
るが、しかし、これらの技術は被測定物内部の欠陥箇所
や剥離箇所を特定するための技術であって2次元的な被
測定物表面の付着物質などについての情報を得ようとす
るものではない。In fields other than forensic technology, for example, JP-A-60-213854 and JP-A-61-952.
Although a method of measuring a defect in a structure, a tile, or the like using infrared rays as disclosed in Japanese Patent Publication No. 21 is also taught, these techniques, however, detect defects and peeling points inside the object to be measured. This is a technique for specifying and does not seek to obtain information about the two-dimensionally attached substance on the surface of the object to be measured.
【0006】[0006]
【発明が解決しようとする問題点】本発明は、例えば赤
外線のような、指紋成分中の水分または脂肪分などの有
機物質が吸収を起こす領域の波長の光を照射し、その時
生じる表面の温度変化を測定することにより潜在指紋の
所在を特定することを実現したものである。本発明は、
前述の欠点に鑑みて、従来行われている指紋検出方法の
ような検体に直接触れるのではなく、非接触での検出方
法を実現したもので、かつ、作業者の個人差に関係なく
一定品質の指紋を検出するために行う効果的な方法を提
供するものである。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The present invention irradiates light having a wavelength in a region where organic substances such as water or fat in a fingerprint component are absorbed, such as infrared rays, and the temperature of the surface generated at that time is irradiated. It is possible to identify the location of the latent fingerprint by measuring the change. The present invention is
In view of the above-mentioned drawbacks, it realizes a non-contact detection method instead of directly touching a sample like a conventional fingerprint detection method, and has a constant quality regardless of individual differences of workers. It provides an effective method to detect fingerprints of humans.
【0007】[0007]
【課題を解決するための手段】本発明は、指紋を含む検
体に光源から光を照射し、得られる指紋像を演算処理し
て指紋を検出する光学的指紋検出方法において、予め前
記検体の表面温度を測定して熱画像情報として記憶し、
次に検体に対して指紋成分中に含まれる水分または脂肪
分などの有機物質の量によって吸収特性が変化する領域
の波長の光をある一定時間投射した後この投射光をカッ
トし、その時の検体表面の温度を測定して熱画像情報と
してとらえ、予め測定し記憶しておいた投射光照射前の
熱画像情報と、投射光を照射した後の熱画像情報とを電
気信号に変換し、2次元温度分布の差を演算し、演算し
た結果得られる画像を表示することにより指紋隆線の所
在を特定することを特徴とする指紋検出方法である。The present invention provides an optical fingerprint detection method for detecting a fingerprint by irradiating a specimen containing a fingerprint with light from a light source and processing the resulting fingerprint image to detect the fingerprint in advance. Measures the temperature and stores it as thermal image information,
Next, after projecting for a certain period of time a light of a wavelength in the region where the absorption characteristics change depending on the amount of organic substances such as water or fat contained in the fingerprint component, this projected light is cut, and the sample at that time The surface temperature is measured and captured as thermal image information, and the thermal image information before the irradiation of the projection light and the thermal image information after the irradiation of the projection light, which are measured and stored in advance, are converted into an electric signal, and 2 A fingerprint detecting method characterized in that the location of a fingerprint ridge is specified by calculating the difference between the dimensional temperature distributions and displaying the image obtained as a result of the calculation.
【0008】[0008]
【作用】前述したように、光学的な指紋検出方法の代表
例であるレーザ法により指紋を検出する技術において
は、指紋隆線からの発光を強調するために蛍光性を有す
るローダミン系などの色素溶液に接触させたり、指紋成
分中に含まれるアミノ酸に化学薬品を反応させることに
より蛍光性を増すなどの処理を行う必要がある。As described above, in the technique of detecting a fingerprint by the laser method, which is a typical example of an optical fingerprint detecting method, a dye such as a rhodamine-based dye having fluorescence in order to enhance light emission from fingerprint ridges. It is necessary to perform treatment such as increasing the fluorescence by contacting with a solution or by reacting an amino acid contained in the fingerprint component with a chemical.
【0009】本発明は、以上のような操作に代え、予め
検体の表面温度を測定し熱画像情報として記憶し、次に
検体に対して指紋成分中に含まれる水分または脂肪分な
どの有機物質の量によって吸収特性が変化する領域の波
長の光をある一定時間投射した後投射光をカットし、そ
の時の検体表面の温度を測定し熱画像情報としてとら
え、予め測定し記憶しておいた投射光を照射する前の熱
画像情報と投射光を照射した後の熱画像情報とを電気信
号に変換し、2次元温度分布の差を演算することにより
潜在指紋を検出するものである。In the present invention, instead of the above operation, the surface temperature of the sample is measured in advance and stored as thermal image information, and then the organic substance such as water or fat contained in the fingerprint component with respect to the sample. After projecting light with a wavelength in the region where the absorption characteristics change depending on the amount of light for a certain period of time, the projection light is cut, the temperature of the specimen surface at that time is measured and captured as thermal image information, and the projection is measured and stored in advance. The latent fingerprint is detected by converting the thermal image information before irradiating the light and the thermal image information after irradiating the projection light into an electric signal and calculating the difference in the two-dimensional temperature distribution.
【0010】従って、従来行われている指紋検出方法の
ように検体に直接触れることはなく非接触での検出が可
能であるため、粉末や溶液による検体への汚染や指紋そ
のものが流される心配もなく、かつ、作業者自身の個人
差による検出結果のバラツキもなくなる。また、一度に
広範囲を検索することができるため検出にかかる時間が
短縮され作業性が向上する。Therefore, unlike the conventional fingerprint detecting method, the sample can be detected in a non-contact manner without directly touching the sample, so that the sample may be contaminated by powder or solution or the fingerprint itself may be washed away. In addition, there is no variation in detection results due to individual differences among workers. Further, since a wide range can be searched at once, the time required for detection is shortened and the workability is improved.
【0011】[0011]
【実施例】以下、本発明の一実施例における指紋検出方
法を添付図面に基づいて説明する。熱画像情報を検出す
る手段として、今赤外線カメラを用いた場合を考える。
まず、検体表面の温度分布を測定しその結果得られる熱
画像情報を記憶する。図2は本発明を実施するための装
置の例を示すブロック図である。潜在指紋2を含む検体
表面1をランプ光源5で照射し、赤外線カメラ4により
検体表面1の温度分布を赤外線透過フィルタ3を通して
検出し、その熱画像情報を画像演算装置6を経てメモリ
装置8に記憶する。この記憶された熱画像情報をいまA
とする。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A fingerprint detecting method according to an embodiment of the present invention will be described below with reference to the accompanying drawings. Consider a case where an infrared camera is used as a means for detecting thermal image information.
First, the temperature distribution on the surface of the sample is measured and the resulting thermal image information is stored. FIG. 2 is a block diagram showing an example of an apparatus for implementing the present invention. The sample surface 1 including the latent fingerprint 2 is illuminated by the lamp light source 5, the temperature distribution of the sample surface 1 is detected by the infrared camera 4 through the infrared transmission filter 3, and the thermal image information is stored in the memory device 8 via the image calculation device 6. Remember. This stored thermal image information is now A
And
【0012】つぎに、指紋成分中に含まれる水分や脂肪
分などの有機物質が吸収する波長の光を照射し、照射後
の検体1の表面の温度分布を測定し、その熱画像情報を
記憶する。近赤外線領域における水の吸収帯は図1に示
すように1.43μm、1.94μm、3μmなどにあ
ることは公知の事実である。これらの波長を含む光をラ
ンプ光源5から検体表面1に照射すると水分や脂肪分な
どの指紋成分が光のエネルギーを吸収し、指紋隆線部分
の温度が検体自身の表面温度よりも高くなる。ランプ光
源5によりある一定時間前記波長を含む光を検体1に照
射した後、赤外線カメラ4により検体表面1の温度分布
を赤外線透過フィルタ3を通して検出し、その熱画像情
報をメモリ装置8に記憶する。この記憶された熱画像情
報をいまBとする。ランプ光源5からの光の照射時間は
コントローラ7により制御され、検体1の種類や表面状
態、または保存状態等に応じて光の照射時間を変えられ
る仕組みになっている。Next, light having a wavelength absorbed by an organic substance such as water or fat contained in the fingerprint component is irradiated, the temperature distribution on the surface of the specimen 1 after irradiation is measured, and the thermal image information is stored. To do. It is a known fact that the absorption band of water in the near infrared region is 1.43 μm, 1.94 μm, 3 μm, etc. as shown in FIG. When the sample surface 1 is irradiated with light including these wavelengths from the lamp light source 5, fingerprint components such as moisture and fat absorb light energy, and the temperature of the fingerprint ridge portion becomes higher than the surface temperature of the sample itself. After irradiating the sample 1 with the light including the wavelength for a certain period of time by the lamp light source 5, the infrared camera 4 detects the temperature distribution of the sample surface 1 through the infrared transmission filter 3 and stores the thermal image information in the memory device 8. .. This stored thermal image information is now B. The irradiation time of the light from the lamp light source 5 is controlled by the controller 7 so that the irradiation time of the light can be changed according to the type, surface state, storage state, etc. of the sample 1.
【0013】熱画像情報AおよびBは、濃淡情報として
数値化されメモリ装置8の中に記憶されている。画像演
算装置6において、光を照射する前の熱画像情報Aと光
を照射した後の熱画像情報Bの数値データの差を演算
し、等温部分を結ぶと図3に示されるような画像が得ら
れる。指紋隆線部分に相当する温度は検体表面の温度に
比べて高いので、図3においては曲線11、12、13
などで囲まれる領域が指紋隆線部分10に相当する。The thermal image information A and B are digitized as grayscale information and stored in the memory device 8. In the image calculation device 6, the difference between the numerical data of the thermal image information A before irradiation with light and the numerical data of the thermal image information B after irradiation of light is calculated, and when the isothermal parts are connected, an image as shown in FIG. 3 is obtained. can get. Since the temperature corresponding to the fingerprint ridge portion is higher than the temperature of the surface of the sample, the curves 11, 12, 13 are shown in FIG.
The area surrounded by, for example, corresponds to the fingerprint ridge portion 10.
【0014】図3の中から指紋隆線部分10のみを抽出
する方法は、画像演算装置6によりある閾値を設定し数
値データを二値化することである。二値化することによ
り相対的に温度レベルの低い部分、即ち検体表面部分
と、相対的に温度レベルの高い部分、即ち指紋隆線部分
とを分割することが可能である。その結果得られた画像
が図4に示されるものであり、この画像はディスプレイ
9に表示し確認することができる。図4中指紋隆線部分
10は斜線で表され、指紋判別手段として用いられる分
岐点や端点などの特徴点の位置が認識できる。The method of extracting only the fingerprint ridge portion 10 from FIG. 3 is to set a certain threshold value by the image calculation device 6 and binarize the numerical data. By binarizing, it is possible to divide a portion having a relatively low temperature level, that is, a sample surface portion, and a portion having a relatively high temperature level, that is, a fingerprint ridge portion. The resulting image is shown in FIG. 4, and this image can be displayed on the display 9 for confirmation. The fingerprint ridge line portion 10 in FIG. 4 is represented by diagonal lines, and the positions of feature points such as branch points and end points used as fingerprint discrimination means can be recognized.
【0015】上述の如く、検体表面の温度分布を測定す
ることにより非接触で潜在指紋の所在を明らかにするこ
とが可能となる。As described above, by measuring the temperature distribution on the surface of the sample, the location of the latent fingerprint can be clarified without contact.
【0016】[0016]
【発明の効果】本発明方法で指紋検出を行うことによ
り、次のような利点を生ずる。 (1)従来行われている指紋検出方法のように検体に直
接触れることはなく非接触での検出が可能であるため、
粉末や溶液による検体への汚染の心配や指紋そのものが
壊されてしまうことがなくなる。The fingerprint detection by the method of the present invention has the following advantages. (1) Since the sample can be detected in a non-contact manner without directly touching the sample unlike the conventional fingerprint detection method,
There is no concern about contamination of the sample by powder or solution and destruction of the fingerprint itself.
【0017】(2)作業者自身の個人差による検出され
た指紋の品質のバラツキがなくなり、常に安定した検出
を行うことができる。 (3)一度に広範囲を検索できるため、検出にかかる時
間が短縮され作業性が向上する。 なお、本発明は上述の特定の実施例に限定されるもので
はなく、本発明の技術的範囲において種々の変形が可能
であることはもちろんである。(2) There is no variation in the quality of the detected fingerprints due to individual differences among workers, and stable detection can always be performed. (3) Since a wide range can be searched at once, the time required for detection is shortened and workability is improved. It should be noted that the present invention is not limited to the above-mentioned specific embodiments, and it goes without saying that various modifications can be made within the technical scope of the present invention.
【図1】水の分光吸収特性を示すグラフである。FIG. 1 is a graph showing a spectral absorption characteristic of water.
【図2】本発明方法を実施するための実施例装置を示す
ブロック図である。FIG. 2 is a block diagram showing an embodiment apparatus for carrying out the method of the present invention.
【図3】本発明方法において得られる等温度曲線の一例
を示した説明図である。FIG. 3 is an explanatory diagram showing an example of isothermal curves obtained by the method of the present invention.
【図4】本発明方法における一実施例の結果得られる指
紋隆線像である。FIG. 4 is a fingerprint ridge image obtained as a result of an example of the method of the present invention.
1 検体表面 2 潜在指紋 3 赤外線透過フィルタ 4 赤外線カメラ 5 ランプ光源 6 画像演算装置 7 コントローラ 8 メモリ装置 9 ディスプレイ 1 Sample Surface 2 Latent Fingerprint 3 Infrared Transmission Filter 4 Infrared Camera 5 Lamp Light Source 6 Image Processing Device 7 Controller 8 Memory Device 9 Display
Claims (1)
し、得られる指紋像を演算処理して指紋を検出する光学
的指紋検出方法において、 予め前記検体の表面温度を測定して熱画像情報として記
憶し、 次に該検体に対して指紋成分中に含まれる水分または有
機物質の量によって吸収特性が変化する領域の波長の光
を一定時間投射した後該投射光をカットし、その時の該
検体表面の温度を測定し熱画像情報としてとらえ、 予め測定し記憶しておいた投射光照射前の熱画像情報
と、投射光を照射した後の熱画像情報とを電気信号に変
換し、2次元温度分布の差を演算し、演算した結果得ら
れる画像を表示することにより指紋隆線の所在を特定す
ることを特徴とする指紋検出方法。1. An optical fingerprint detection method for detecting a fingerprint by irradiating a specimen containing a latent fingerprint with light from a light source and processing the obtained fingerprint image to detect a fingerprint. It is stored as information, and then the light having a wavelength in the region where the absorption characteristic changes depending on the amount of water or an organic substance contained in the fingerprint component is projected onto the specimen for a certain period of time, and then the projected light is cut off. The temperature of the sample surface is measured and captured as thermal image information, and the thermal image information before the irradiation of the projection light, which is measured and stored in advance, and the thermal image information after the irradiation of the projection light is converted into an electric signal, A fingerprint detecting method, characterized in that a location of a fingerprint ridge is specified by calculating a difference between two-dimensional temperature distributions and displaying an image obtained as a result of the calculation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3338340A JPH05168610A (en) | 1991-12-20 | 1991-12-20 | Fingerprint detecting method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3338340A JPH05168610A (en) | 1991-12-20 | 1991-12-20 | Fingerprint detecting method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH05168610A true JPH05168610A (en) | 1993-07-02 |
Family
ID=18317236
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3338340A Withdrawn JPH05168610A (en) | 1991-12-20 | 1991-12-20 | Fingerprint detecting method |
Country Status (1)
Country | Link |
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JP (1) | JPH05168610A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003331268A (en) * | 2002-05-13 | 2003-11-21 | Hitachi Ltd | Biometrics device and program for implementing the same |
KR20040025968A (en) * | 2002-09-17 | 2004-03-27 | 주식회사 휴노테크놀로지 | Finger print input apparatus capable of preventing remaining image input |
US6849460B2 (en) | 1996-10-09 | 2005-02-01 | Symyx Technologies, Inc. | Infrared spectroscopy imaging of libraries |
US20110025835A1 (en) | 2004-11-15 | 2011-02-03 | Nec Corporation | Apparatus for Inputing Biometrical Feature |
US8374406B2 (en) | 2006-04-28 | 2013-02-12 | Nec Corporation | Image reading apparatus for feature image of live body |
CZ305219B6 (en) * | 2013-03-21 | 2015-06-17 | České vysoké učení technické v Praze, Fakulta strojní, Ústav přístrojové a řídící techniky | Method of automatic contactless determination of surface emissivity and apparatus for making the same |
WO2022064822A1 (en) * | 2020-09-24 | 2022-03-31 | 日本電気株式会社 | Detection device and detection method |
-
1991
- 1991-12-20 JP JP3338340A patent/JPH05168610A/en not_active Withdrawn
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6849460B2 (en) | 1996-10-09 | 2005-02-01 | Symyx Technologies, Inc. | Infrared spectroscopy imaging of libraries |
US7364697B2 (en) | 1996-10-09 | 2008-04-29 | Symyx Technologies, Inc. | System for infrared spectroscopic imaging of libraries |
US7551285B2 (en) | 1996-10-09 | 2009-06-23 | Symyx Technologies, Inc. | Methods and apparatus for spectroscopic imaging of materials in an array |
JP2003331268A (en) * | 2002-05-13 | 2003-11-21 | Hitachi Ltd | Biometrics device and program for implementing the same |
KR20040025968A (en) * | 2002-09-17 | 2004-03-27 | 주식회사 휴노테크놀로지 | Finger print input apparatus capable of preventing remaining image input |
US20110025835A1 (en) | 2004-11-15 | 2011-02-03 | Nec Corporation | Apparatus for Inputing Biometrical Feature |
US7903847B2 (en) | 2004-11-15 | 2011-03-08 | Nec Corporation | Apparatus for inputting biometrical feature |
US8170301B2 (en) | 2004-11-15 | 2012-05-01 | Nec Corporation | Apparatus for inputting biometrical feature |
US8374406B2 (en) | 2006-04-28 | 2013-02-12 | Nec Corporation | Image reading apparatus for feature image of live body |
CZ305219B6 (en) * | 2013-03-21 | 2015-06-17 | České vysoké učení technické v Praze, Fakulta strojní, Ústav přístrojové a řídící techniky | Method of automatic contactless determination of surface emissivity and apparatus for making the same |
WO2022064822A1 (en) * | 2020-09-24 | 2022-03-31 | 日本電気株式会社 | Detection device and detection method |
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