JP2010019749A - X-ray inspecting device - Google Patents

X-ray inspecting device Download PDF

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JP2010019749A
JP2010019749A JP2008181797A JP2008181797A JP2010019749A JP 2010019749 A JP2010019749 A JP 2010019749A JP 2008181797 A JP2008181797 A JP 2008181797A JP 2008181797 A JP2008181797 A JP 2008181797A JP 2010019749 A JP2010019749 A JP 2010019749A
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JP5384046B2 (en
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Osamu Hirose
修 廣瀬
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Ishida Co Ltd
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Ishida Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an X-ray inspecting device detecting a foreign material surely even when a pixel corresponding to an article to be inspected covers a break portion of X-ray image information due to an insufficient interval in the transfer direction of articles. <P>SOLUTION: The X-ray inspecting device is provided with: a conveying unit for conveying articles; an X-ray source for irradiating articles with X rays during transfer with X rays;, an X-ray detector for receiving a transmitted X ray that transmits through an article; and an image processing unit for image-processing X-ray image information based on an output from the X-ray detector by a predetermined width in the transfer direction of articles. The X-ray image information of the predetermined width, which is an object for each image process, is overlapped in the transfer direction of articles. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、搬送中の物品にX線照射し、その透過X線の画像情報に基づき物品を検査するX線検査装置に関する。   The present invention relates to an X-ray inspection apparatus for irradiating an article being conveyed with X-rays and inspecting the article based on image information of the transmitted X-rays.

従来、物品製造工程で物品への異物混入有無を検査するため、搬送中の物品に対してX線源からX線を照射し、その透過X線を受けたX線検出器からの出力に基づくX線画像情報を画像処理手段で画像処理するX線検査装置が採用されている。かかる物品製造工程では、物品が連続的に搬送されるため、そのX線画像情報も物品搬送方向に連続したものとなる。そこで、X線検査装置では、本来、物品搬送方向に連続するX線画像情報を、物品搬送方向における所定幅ごとに画像処理する(例えば、特許文献1参照。)。
特開2003−65972号公報
Conventionally, in order to inspect the presence or absence of foreign matter in an article during the article manufacturing process, the article being conveyed is irradiated with X-rays from an X-ray source and based on the output from the X-ray detector that has received the transmitted X-rays An X-ray inspection apparatus that performs image processing of X-ray image information by an image processing means is employed. In such an article manufacturing process, since the articles are continuously conveyed, the X-ray image information is also continuous in the article conveying direction. Therefore, the X-ray inspection apparatus originally performs image processing on X-ray image information continuous in the article conveyance direction for each predetermined width in the article conveyance direction (see, for example, Patent Document 1).
JP 2003-65972 A

ところで、X線検査装置では、画像処理に際して空間フィルタによるフィルタリング処理をよく利用する。空間フィルタによるフィルタリング処理では、X線画像情報において、フィルタリング処理の対象となる画素自体の濃淡値と、その周辺領域に位置する画素の濃淡値とを比較して濃淡値を変換処理するもので、ノイズの軽減やエッジの強調を図る。しかしながら、X線画像情報の外周縁に位置する画素は、その周辺領域において画素が存在しない部分があるため、適正なフィルタリング処理を行えない場合がある。その結果、X線画像情報の外周縁に位置する画素に関しては、異物検出ができないか、又は異物検出の精度が不十分となることがある。   By the way, in the X-ray inspection apparatus, filtering processing using a spatial filter is often used for image processing. In the filtering process by the spatial filter, in the X-ray image information, the gray value of the pixel itself to be subjected to the filtering process is compared with the gray value of the pixel located in the surrounding area, and the gray value is converted. Reduce noise and enhance edges. However, there is a case where the pixel located at the outer peripheral edge of the X-ray image information cannot be properly filtered because there is a portion where the pixel does not exist in the peripheral region. As a result, with respect to pixels located on the outer periphery of the X-ray image information, foreign matter detection may not be possible, or the foreign matter detection accuracy may be insufficient.

ここで、搬送物品Gが包装資材で一纏めに包装される個装品の場合、図5(a)に示されるように、物品搬送方向に間隔をおいて搬送できるため、同図(b)に示されるように、搬送物品に対応する濃色の画素部分G´は、各画像処理の対象となるX線画像情報の区切り部分(外周縁)にかからないようにすることができる。しかしながら、搬送物品が個装されていないバラ品の場合、図6(a)に示されるように、物品搬送方向(矢印Z方向)において間隔を確保することができず、同図(b)に示されるように、搬送物品Gに対応する濃色の画素部分G´が、X線画像情報の区切り部分にかかり、フィルタリング処理不良とそれに起因する異物検出不良を生じる。   Here, in the case where the articles to be conveyed G are individually packaged together with packaging materials, as shown in FIG. 5 (a), the articles can be conveyed at intervals in the article conveying direction. As shown in the drawing, the dark pixel portion G ′ corresponding to the transported article can be prevented from covering the separation portion (outer peripheral edge) of the X-ray image information that is the target of each image processing. However, in the case of a loose article in which the transported article is not individually packaged, as shown in FIG. 6A, the interval cannot be secured in the article transport direction (arrow Z direction), and FIG. As shown, the dark color pixel portion G ′ corresponding to the transported article G is applied to the delimiter portion of the X-ray image information, resulting in a filtering processing failure and a foreign matter detection failure resulting therefrom.

本願発明は、上記の事情に鑑みて、物品の搬送方向における間隔を確保できない等の事情で、被検査物品に対応する画素がX線画像情報の区切り部分にかかる場合でも、洩れなく異物を検出できるX線検査装置を提供する。   In view of the above circumstances, the present invention detects foreign matter without leakage even when the pixel corresponding to the inspected item falls on the separation part of the X-ray image information due to the fact that the interval in the conveyance direction of the item cannot be secured. Provided is an X-ray inspection apparatus capable of

請求項1記載の発明は、物品を搬送する搬送手段と、
搬送中の物品に対してX線を照射するX線源と、
物品を透過した透過X線を受けるX線検出器と、
前記X線検出器からの出力に基づくX線画像情報を、物品搬送方向における所定幅ごとに画像処理する画像処理手段と、を備えるX線検査装置であって、
各画像処理の対象とする前記所定幅のX線画像情報を、物品搬送方向においてオーバーラップさせることを特徴とするX線検査装置を提供する。
The invention according to claim 1 is a conveying means for conveying an article;
An X-ray source that irradiates the article being conveyed with X-rays;
An X-ray detector for receiving transmitted X-rays transmitted through the article;
An X-ray inspection apparatus comprising: an image processing unit that performs image processing on X-ray image information based on an output from the X-ray detector for each predetermined width in the article conveyance direction,
Provided is an X-ray inspection apparatus characterized in that X-ray image information having a predetermined width to be subjected to image processing is overlapped in an article conveyance direction.

請求項2記載の発明は、請求項1記載のX線検査装置であって、
前記オーバーラップさせる幅は、前記各画像処理に際して、前記X線画像情報の外周縁部分に位置するために空間フィルタによるフィルタリング処理に支障を生じる画素数幅の2倍に設定されていることを特徴とするX線検査装置を提供する。
The invention described in claim 2 is the X-ray inspection apparatus according to claim 1,
The width to be overlapped is set to be twice the width of the number of pixels that cause a problem in filtering processing by a spatial filter because it is located at the outer peripheral edge of the X-ray image information in each image processing. An X-ray inspection apparatus is provided.

請求項1記載の発明によれば、以下の優れた効果を奏する。X線画像情報を物品搬送方向で所定幅ごとに区切って画像処理すると、当該区切り部分にかかる画素について、空間フィルタによるフィルタリング処理を適正に行えないが、各画像処理の対象とするX線画像情報を物品搬送方向でオーバーラップさせることにより、フィルタリング処理を適正に行えない部分を実質的に解消して、異物の検出洩れを防止することができる。   According to invention of Claim 1, there exist the following outstanding effects. If the X-ray image information is divided into predetermined widths in the article conveyance direction and image processing is performed, the filtering process by the spatial filter cannot be properly performed for the pixels related to the separation portion, but the X-ray image information to be subjected to each image processing Is overlapped in the article conveying direction, the portion where the filtering process cannot be performed properly can be substantially eliminated, and foreign matter detection leakage can be prevented.

請求項2記載の発明によれば、請求項1記載の発明の効果に加え、以下の優れた効果を奏する。オーバーラップ幅を空間フィルタによるフィルタリング処理に支障を生じる画素数幅の2倍に設定することで、同じ領域を二重に検査する無駄をなくすことができる。また、検査した物品の位置を特定し易くなる。   According to invention of Claim 2, in addition to the effect of invention of Claim 1, there exist the following outstanding effects. By setting the overlap width to twice the width of the number of pixels that interferes with the filtering process by the spatial filter, it is possible to eliminate wasteful inspection of the same region. In addition, the position of the inspected article can be easily specified.

以下に、本発明の実施の形態を、図を参照しながら説明する。図1は、本実施形態にかかるX線検査装置の構成ブロック図、図2は、連続的に出力されるX線画像情報において、画像処理の実行単位となる所定幅の単位X線画像情報を規定する方法を示す図、図3は、各単位X線画像情報において適正にフィルタリング処理が行われる範囲を示す図、図4は、X線画像情報全体として適正にフィルタリング処理が行われる範囲を示す図である。   Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration block diagram of the X-ray inspection apparatus according to the present embodiment, and FIG. FIG. 3 is a diagram illustrating a method of defining, FIG. 3 is a diagram illustrating a range in which filtering processing is appropriately performed in each unit X-ray image information, and FIG. 4 is a diagram illustrating a range in which filtering processing is appropriately performed as the entire X-ray image information. FIG.

(X線検査装置1の概要)
図1に示されるX線検査装置1は、物品を上面に載せて矢印Z方向に搬送する搬送手段2と、搬送手段2の上方に設けられ、搬送中の物品Gに対してX線を照射するX線源3と、搬送手段2の下方に設けられ、物品Gを透過したX線を受けるX線検出器4と、X線検出器4から連続的に出力されるX線画像情報をもとに物品Gへの異物混入有無を検出する画像処理手段5と、を備えてなる。搬送手段2、X線源3及びX線検出器4は、不図示のX線防護カバー及びX線防護カーテンで覆われ、装置外部にX線が漏洩しないように構成される。
(Outline of X-ray inspection apparatus 1)
The X-ray inspection apparatus 1 shown in FIG. 1 is provided with a conveying means 2 that conveys an article in the direction of arrow Z on the upper surface, and is provided above the conveying means 2 and irradiates the article G being conveyed with X-rays. X-ray source 3 that is provided, an X-ray detector 4 that is provided below conveyance means 2 and receives X-rays transmitted through article G, and X-ray image information continuously output from X-ray detector 4 And image processing means 5 for detecting whether foreign matter is mixed in the article G. The transport means 2, the X-ray source 3, and the X-ray detector 4 are covered with an X-ray protective cover and an X-ray protective curtain (not shown) so that X-rays do not leak outside the apparatus.

画像処理手段5は、物品搬送方向に連続出力されるX線画像情報I(図2)に対し、物品搬送方向における所定幅Wごとに、空間フィルタによるフィルタリング処理を含む画像処理を順次行い、物品Gへの異物混入有無を検出する。画像処理手段5には、スピーカ又はモニター(ともに不図示)を備える通報手段6と、エアノズル又は水平方向に作動するバー(ともに不図示)を備える振分手段7が接続され、画像処理手段5から出力される異物検出信号に基づき、通報手段6によるオペレータへの通報及び振分手段7による異物混入物品の排除が行われる。   The image processing means 5 sequentially performs image processing including filtering processing by a spatial filter on the X-ray image information I (FIG. 2) continuously output in the article conveyance direction for each predetermined width W in the article conveyance direction. The presence / absence of foreign matter in G is detected. The image processing means 5 is connected to a reporting means 6 having a speaker or a monitor (both not shown) and an allocating means 7 having an air nozzle or a bar (both not shown) operating in the horizontal direction. Based on the output foreign matter detection signal, the notification means 6 notifies the operator and the sorting means 7 eliminates foreign matter-containing articles.

(物品G及びそのX線画像情報I)
物品Gは、包装資材による個装がなされていないバラ品であって、例えば、図5(a)に示されるように、多数個が物品搬送方向において途切れることなく、連続的に搬送される。そのため、図2(a)に示されるように、X線検出器4から連続的に出力されるX線画像情報Iにおいても、物品Gに対応する濃色の画素部分G´の物品搬送方向(画像出力方向)の間隔は当然ながら確保されていない。
(Article G and its X-ray image information I)
The article G is a loose product that is not individually packaged with a packaging material. For example, as shown in FIG. 5A, a large number of articles G are continuously conveyed without interruption in the article conveying direction. For this reason, as shown in FIG. 2A, the X-ray image information I continuously output from the X-ray detector 4 also has the article conveyance direction ( The interval in the image output direction is naturally not secured.

上記のとおりであるから、画像処理の実行単位となる所定幅WのX線画像情報を、X線画像情報Iを物品搬送方向で単純分割して規定するのでは、その分割線前後の物品Gに対応する画素部分G´が、空間フィルタによるフィルタリング処理が適正に行われない画像の外周縁部分にかかることがあり、当該部分に関しては異物検出洩れが避けられない。そこで、画像処理手段5は、所定幅WのX線画像情報(以下、「単位X線画像情報」という。)iを、以下のように規定する。 As described above, if the X-ray image information having a predetermined width W that is an execution unit of image processing is defined by simply dividing the X-ray image information I in the article conveyance direction, the article G before and after the dividing line is defined. The pixel portion G ′ corresponding to か か る may be applied to the outer peripheral edge portion of the image where the filtering process by the spatial filter is not properly performed. Therefore, the image processing unit 5, the X-ray image information of a predetermined width W (hereinafter, "unit X-ray image information".) The i n, are defined as follows.

(単位X線画像情報iの規定)
画像処理手段5は、図2(a)に示されるように、物品搬送方向に連続するX線画像情報Iにおいて、物品搬送方向と直交し、かつ、同方向において離間する二本の規定線Ln1,Ln2により、所定幅Wの単位X線画像情報iの前後端を規定する。前後端の二本の規定線Ln1,Ln2のうち、前端側の規定線Ln1は、先に規定される単位X線画像情報in−1の後端側の規定線L(n−1)2より前方に位置しており、後端側の規定線Ln2は、後に規定される単位X線画像情報in+1の前端側の規定線L(n+1)1より後方に位置する。
(The provisions of the unit X-ray image information i n)
As shown in FIG. 2A, the image processing means 5 has two prescribed lines L that are orthogonal to the article conveyance direction and spaced apart in the same direction in the X-ray image information I continuous in the article conveyance direction. the n1, L n2, defining the front and rear ends of the unit X-ray image information i n of a predetermined width W. Of two of defining line L n1, L n2 of the front and rear ends, defining line L n1 of the front side, the rear end side of the defining line of the unit X-ray image information i n1 defined above L (n- 1) It is located in front of 2 , and the rear end side defining line L n2 is located behind the front end side defining line L (n + 1) 1 of the unit X-ray image information in n + 1 defined later.

すなわち、単位X線画像情報iは、それに相前後して規定される単位X線画像情報in−1,in+1と物品搬送方向で相互にオーバーラップさせられており、図2(b)に示されるように、前端側の画像部分aが、先に規定される単位X線画像情報in−1の後端側の画像部分bと共通しており、後端側の画像部分cが、後に規定される単位X線画像情報in+1の前端側の画像部分dと共通している。 That is, the unit X-ray image information i n is caused to overlap each other it in tandem unit X-ray image information is defined by i n-1, i n + 1 and the article carrying direction, and FIG. 2 (b) As shown in FIG. 5, the image portion a on the front end side is in common with the image portion b on the rear end side of the unit X-ray image information in n-1 defined earlier, and the image portion c on the rear end side is This is common with the image portion d on the front end side of the unit X-ray image information in + 1 defined later.

上記各共通画像部分a,b,c,dの前後幅は、画像処理に際して、単位X線画像情報iの外周縁部分に位置するために、空間フィルタによるフィルタリング処理を適正に行えない画素数幅tの2倍の画素数幅Tに設定されている。例えば、画像処理手段5による画像処理において、空間フィルタによるフィルタリング処理に支障が生じる外周縁部分の画素数幅tが3画素分である場合、オーバーラップさせる画素数幅Tは2倍の6画素分に設定される。 Each common image portion a, b, c, longitudinal width of d, upon image processing, in order to position the outer peripheral edge portion of the unit X-ray image information i n, the number of pixels that do not perform the filtering process by the spatial filter properly The pixel number width T is set to twice the width t. For example, in the image processing by the image processing means 5, when the number of pixels t at the outer peripheral edge where the filtering processing by the spatial filter is hindered is 3 pixels, the overlapped number of pixels T is 6 times as large as 6 pixels. Set to

(空間フィルタによるフィルタリング処理)
画像処理手段5は、上述のように規定した所定幅Wの単位X線画像情報iに対して、空間フィルタによるフィルタリング処理を施すが、画素数幅t(=T/2)の外周縁部分(図3において斜線を施した部分)Cではフィルタリング処理が適正に行えない。その一方、外周縁部分Cより内側に形成される内枠部分(図3の太枠で囲まれる部分)Fではフィルタリング処理を適正に行うことができる。すなわち、単位X線画像情報iでは、先に規定される単位X線画像情報in−1と共通の画像部分aのうち、内枠部分Fに収まる後方側半分、及び後に規定される単位X線画像情報in−1と共通の画像部分cのうち、内枠部分Fに収まる前方側半分についてフィルタリング処理が適正に行われる。
(Filtering process by spatial filter)
The image processing means 5, the outer peripheral edge portion with respect to the unit X-ray image information i n of a predetermined width W which is defined as above, subjected to a filtering process by the spatial filter, the number of pixels width t (= T / 2) It can not properly perform C n the filtering process (performed partial oblique lines in FIG. 3). Meanwhile, it is possible to properly carry out the (enclosed in part by a thick frame in FIG. 3), the F n filtering processing frame portion formed on the inner side than the outer peripheral edge portion C n. That is, the unit X-ray image information i n, of the unit X-ray image is defined above information i n-1 and the common image part a, is defined in the rear half, and after that fall inner frame portion F n Of the image portion c common to the unit X-ray image information i n−1 , the filtering process is appropriately performed on the front half that falls within the inner frame portion F n .

単位X線画像情報iの前後に規定される単位X線画像情報in−1,in+1についても同様にフィルタリング処理が施され、先に規定される単位X線画像情報in−1では、単位X線画像情報iと共通の画像部分bのうち内枠部分Fn−1に収まる前方側半分について、後に規定される単位X線画像情報in+1では、単位X線画像情報iと共通の画像部分dのうち内枠部分Fn+1に収まる後方側半分において、フィルタリング処理が適正に行われる。したがって、図4(a)に示されるように、各共通画像部分(aとb,cとd)は、一方の単位X線画像情報において適正にフィルタリング処理される画素数幅tの部分が、他方の単位X線画像情報において適正にフィルタリング処理されない画素数幅tの部分を補完する関係となる。 The unit X-ray image information i n −1 , i n + 1 defined before and after the unit X-ray image information i n is similarly subjected to the filtering process. In the unit X-ray image information i n−1 defined earlier, for the front half fits the unit X-ray image information i n the inner frame portion F n-1 of the common image portion b, the unit X-ray image information i n + 1 is defined later, the unit X-ray image information i n Filtering processing is appropriately performed in the rear half of the image portion d common to the inner frame portion F n + 1 . Therefore, as shown in FIG. 4A, each common image portion (a and b, c and d) has a pixel number width t that is appropriately filtered in one unit X-ray image information. In the other unit X-ray image information, the relationship of complementing the portion of the pixel number width t that is not properly filtered.

したがって、単位X線画像情報in−1〜in+1の共通画像部分(aとb,cとd)を相互に重ね合わせてみると、図4(b)に示されるように、連続出力されるX線画像情報Iの濃色の画素部分G´において、適正なフィルタリング処理を施せなかった部分は残存しておらず、結果として、すべての物品Gについて確実に異物検出をすることができる。ここで、物品Gに対応する画素部分G´が、物品搬送方向と直交する方向(図中の上下方向)に広がることによって、外周縁部分(図中の上下辺)にかかることが無いように、例えば、物品Gを物品搬送方向と直交する方向の中央部に寄せるガイドを設ける等、物品群の広がりを防止する必要があることは勿論である。 Therefore, when the common image portions (a and b, c and d) of the unit X-ray image information i n-1 to i n + 1 are superimposed on each other, as shown in FIG. In the dark color pixel portion G ′ of the X-ray image information I, the portion where the proper filtering process cannot be performed does not remain, and as a result, the foreign matter can be reliably detected for all the articles G. Here, the pixel portion G ′ corresponding to the article G spreads in a direction (vertical direction in the figure) perpendicular to the article conveyance direction so that it does not cover the outer peripheral edge part (upper and lower sides in the figure). Needless to say, it is necessary to prevent the spread of the article group, for example, by providing a guide for bringing the article G to the center in the direction orthogonal to the article conveying direction.

(上記実施形態に係るX線検査装置1の特徴)
第一に、X線検査装置1は、物品搬送方向に連続出力されるX線画像情報Iを、物品搬送方向における所定幅Wごとに画像処理する際、各画像処理の対象とする所定幅Wの単位X線画像情報iを、物品搬送方向においてオーバーラップさせて規定するという特徴を有する。この特徴によれば、検査する物品Gがいわゆるバラ品で、規定された単位X線画像情報iにおいて、物品搬送方向の前後端(外周縁部分)に物品Gに対応する画素部分G´がかかり空間フィルタによるフィルタリング処理が適正に行えない場合でも、物品搬送方向でオーバーラップする前後の単位X線画像情報in−1,in+1で補完することができる。その結果として、適正なフィルタリング処理を行えない部分が実質的に解消し、異物検出の洩れが確実に防止される。
(Characteristics of X-ray inspection apparatus 1 according to the above embodiment)
First, when the X-ray inspection apparatus 1 performs image processing on the X-ray image information I continuously output in the article conveyance direction for each predetermined width W in the article conveyance direction, the predetermined width W that is an object of each image processing. the unit X-ray image information i n of, has a characteristic that defines be overlapped in the article carrying direction. According to this feature, the inspection for the article G is called roses products, at a defined unit X-ray image information i n, the pixel portion G'which corresponds to the article G in the front and rear ends of the article transport direction (outer peripheral edge portion) Even when the filtering process using the spatial filter cannot be performed properly, the unit X-ray image information i n−1 and i n + 1 before and after overlapping in the article conveyance direction can be complemented. As a result, the portion where proper filtering processing cannot be performed is substantially eliminated, and leakage of foreign matter detection is reliably prevented.

第二に、X線検査装置1は、相前後する単位X線画像情報間でオーバーラップする画素数幅Tを、各画像処理に際して、単位X線画像情報の外周縁部分に位置するために空間フィルタによるフィルタリング処理に支障を生じる画素数幅tの2倍に設定しているという特徴を有する。この特徴によれば、単位X線画像情報iの前後の単位X線画像情報in−1,in+1は、単位X線画像情報iにおいて適正にフィルタリング処理できない画素数幅tの部分のみを補完することになる。結果として、同じ領域を二重に検査する無駄をなくすことができるものである。また、オーバーラップ幅を大きく設定する場合に比べて、各X線画像情報iと実際の物品Gの対応が容易で、物品Gに異物混入していた場合に、該当する物品Gの位置を特定し易い。 Secondly, the X-ray inspection apparatus 1 uses a space for positioning the overlapping pixel number width T between successive unit X-ray image information at the outer peripheral portion of the unit X-ray image information in each image processing. It has a feature that it is set to twice the pixel number width t which causes a problem in filtering processing by a filter. According to this feature, the front and rear of the unit X-ray image of the unit X-ray image information i n information i n-1, i n + 1 , only part of the proper filtering can not pixel number width t in the unit X-ray image information i n Will be complemented. As a result, the waste of inspecting the same region twice can be eliminated. Further, as compared with the case of setting large the overlap width, easy to correspond the actual article G and the X-ray image information i n, if you were contaminated in the article G, the position of the relevant article G Easy to identify.

(上記実施形態の変形例)
上記実施形態では、同じ領域を二重検査する無駄をなくすため、物品搬送方向において相前後する単位X線画像情報どうしのオーバーラップ幅Tは、フィルタリング処理に支障を生じる外周縁部の画素数幅tの2倍に設定したが、これに限らず、画素数幅tの2倍より大きな画素数幅に設定しても、適切にフィルタリングできない部分が解消されて確実に異物検出することができる。
(Modification of the above embodiment)
In the above embodiment, in order to eliminate the waste of double inspection of the same region, the overlap width T between the unit X-ray image information in the article conveyance direction is the width of the number of pixels at the outer peripheral edge that interferes with the filtering process. However, the present invention is not limited to this, and even if the pixel number width is set to be larger than twice the pixel number width t, the portion that cannot be appropriately filtered is eliminated, and foreign matter detection can be reliably performed.

上記実施形態では、検査対象とする物品を、包装資材による個装がなされず、物品搬送方向において間隔を確保できないバラ品として説明したが、これに限らず、個装品を検査対象としても良い。例えば、物品搬送間隔を一定に設定することができない、物品搬送間隔と各画像処理の対象となる所定幅のX線画像情報の取得間隔を同期させることができない、人手等の外乱要因で物品搬送間隔が途中変動させられる等の事情があって、物品搬送方向(画像出力方向)に間隔をおいて表れる画像の区切り部分(外周縁部分)に、物品に対応する画素部分がかかるような場合にも、本発明を適用することができる。   In the above-described embodiment, the article to be inspected has been described as an individual product that is not individually packaged with packaging materials and cannot secure an interval in the article conveyance direction. . For example, the article conveyance interval cannot be set constant, the article conveyance interval cannot be synchronized with the acquisition interval of the X-ray image information of a predetermined width to be subjected to each image processing, and the article conveyance is caused by a disturbance factor such as manpower. When there is a situation such as the interval being changed in the middle, and the pixel portion corresponding to the article is applied to the separation portion (outer peripheral edge portion) of the image that appears at intervals in the article conveyance direction (image output direction) Also, the present invention can be applied.

その他、本発明は、上述した実施形態や変形例に限定されることなく、その趣旨を逸脱しない範囲において、種々の変更を加え得ることは勿論である。   In addition, the present invention is not limited to the above-described embodiments and modifications, and it is needless to say that various modifications can be made without departing from the spirit of the present invention.

本実施形態にかかるX線検査装置の構成ブロック図。1 is a configuration block diagram of an X-ray inspection apparatus according to an embodiment. 単位X線画像情報の規定方法を示す図。The figure which shows the prescription | regulation method of unit X-ray image information. 単位X線画像情報において適正にフィルタリング処理される範囲を示す図。The figure which shows the range filtered appropriately in unit X-ray image information. 連続した単位X線画像情報において適正にフィルタリング処理される範囲を示す図。The figure which shows the range filtered appropriately in continuous unit X-ray image information. 従来のX線検査装置による個装品検査を説明する図。The figure explaining the individual goods inspection by the conventional X-ray inspection apparatus. 従来のX線検査装置によるバラ品検査の問題点を説明する図。The figure explaining the problem of the separate article inspection by the conventional X-ray inspection apparatus.

符号の説明Explanation of symbols

1 X線検査装置
2 搬送手段
3 X線源
4 X線検出器
5 画像処理手段
6 通報手段
7 振分手段
G 物品
G´ 物品に対応する画素部分
DESCRIPTION OF SYMBOLS 1 X-ray inspection apparatus 2 Conveyance means 3 X-ray source 4 X-ray detector 5 Image processing means 6 Notification means 7 Distribution means G Goods G 'Pixel part corresponding to goods

Claims (2)

物品を搬送する搬送手段と、
搬送中の物品に対してX線を照射するX線源と、
物品を透過した透過X線を受けるX線検出器と、
前記X線検出器からの出力に基づくX線画像情報を、物品搬送方向における所定幅ごとに画像処理する画像処理手段と、を備えるX線検査装置であって、
各画像処理の対象とする前記所定幅のX線画像情報を、物品搬送方向においてオーバーラップさせることを特徴とするX線検査装置。
Conveying means for conveying the article;
An X-ray source that irradiates the article being conveyed with X-rays;
An X-ray detector for receiving transmitted X-rays transmitted through the article;
An X-ray inspection apparatus comprising: an image processing unit that performs image processing on X-ray image information based on an output from the X-ray detector for each predetermined width in the article conveyance direction,
An X-ray inspection apparatus, wherein X-ray image information having a predetermined width as a target of each image processing is overlapped in an article conveyance direction.
請求項1記載のX線検査装置であって、
前記オーバーラップさせる幅は、前記各画像処理に際して、前記X線画像情報の外周縁部分に位置するために空間フィルタによるフィルタリング処理に支障を生じる画素数幅の2倍に設定されていることを特徴とするX線検査装置。
The X-ray inspection apparatus according to claim 1,
The width to be overlapped is set to be twice the width of the number of pixels that cause a problem in filtering processing by a spatial filter because it is located at the outer peripheral edge of the X-ray image information in each image processing. X-ray inspection equipment.
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JP2017191072A (en) * 2016-04-15 2017-10-19 三星電子株式会社Samsung Electronics Co.,Ltd. Image capturing device and image capturing method

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JP2007218749A (en) * 2006-02-17 2007-08-30 Hitachi Zosen Corp Method and apparatus for discriminating matter

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JPH10295680A (en) * 1997-04-25 1998-11-10 Toshiba Corp X-ray tomography
JPH1123494A (en) * 1997-07-02 1999-01-29 Shimadzu Corp X-ray foreign matter inspecting apparatus
JP2006196937A (en) * 2005-01-11 2006-07-27 Yokogawa Electric Corp Image processing apparatus and image processing method
JP2007218749A (en) * 2006-02-17 2007-08-30 Hitachi Zosen Corp Method and apparatus for discriminating matter

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017191072A (en) * 2016-04-15 2017-10-19 三星電子株式会社Samsung Electronics Co.,Ltd. Image capturing device and image capturing method

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