1263773 (1) 九、發明說明 【發明所屬之技術領域】 本發明一般係有關於寬廣物品之檢查方法，更明確地 說’係有關於將多個感測器照相機所捕捉到的分離影像資 料組合之方法。 【先前技術】 ® 迄今已採用各種表面檢查方法，其被設計來偵測出以 連續或分離板或薄板的形式之物品的表面上之各種缺陷或 瑕疵（如污點、空隙、顏色錯誤、顏色不均勻等）的出現。 某些檢查方法能偵測出此種尺寸的缺陷之表面。此種檢查 方法可用於許多不同領域中的各種應用裝置。 實施表面檢查方法的裝置時常會使用感測器照相機（ 如c C D線路感測器照相機、3 C C D彩色線路感測器照相機 、C C D區域感測器照相機等），用以掃瞄可以預定方向連 m ^ 續或間歇地移動之物品的表面。當單一照相機用於檢查寬 廣物品時，照相機必須與物品的檢查表面隔離開足夠大的 照照振離要 互 若，或距想。相 ， 外動開所成 ， 而此移隔，達度 然。微大此來寬 。 低輕較因機的 域減的之。相口g 區會機間大照物 個度相之較器著 整析照機寸測沿 的解爲相尺感用 查則因照的一使 檢，會與置單用 待遠至品裝用採 蓋較甚物使使已 涵面質。地由， 能表品響免藉題 機查像影避能問 相檢影到可不此 照離的受不性服 使置瞄地會確克 以配掃易將精了 ， 係所輕定查爲 離機機而規檢 距相相動的的 -5- (2) (2)•1263773 隔開距離之對準放置的多個感測器照相機之檢查裝置，使 得每個照相機可涵蓋物品上之整個檢查範圍中的指定區域 。此種裝置係例如揭示於日本專利申請案公開公告號H4-166749、H8-281920 及 2001-337042 中。將來自個別感測 器照相機的分離影像資料組合，然後將組合影像顯示於單 一顯示器單元上的方法及裝置爲習知技術中所熟知的。然 而，如自公開號2001-337042中所顯然可知的，精確地放 置及設定多個感測器照相機很困難且很棘手，使得任兩台 相鄰照相機可涵蓋其各自的檢查範圍，而不會具有兩台照 相機之部分的各自檢查範圍所重疊之範圍，或皆不是由此 兩台相鄰照相機所涵蓋的範圍。 以上引證的公開號H8-28 1 920係揭示線路感測器照相 機的配置，其中，兩台相鄰照相機會共有兩台相鄰照相機 之部分的各自檢查範圍所重疊之預定尺寸的檢查範圍。在 具有此種照相機配置的檢查裝置中，兩台分離照相機所取 得的物品之檢查表面的影像資料需進行處理，以組合影像 資料，以符合線路感測器照相機所掃瞄的表面之實際影像 。分離影像的組合可例如是藉由將來自兩台照相機所傳送 的影像資料予以平均、比較來自照相機的資料及優先採用 例如是較大値的資料，或優先採用任一個預定資料等而達 成。 對於會進行處理，以適當組合影像資料之來自兩台不 同照相機的影像而言，每次檢查或藉由線路感測器照相機 所進行的掃瞄時，必須適當地算出兩台相鄰線路感測器照 -6 ~ (3) 1263773 相機的檢查範圍所重疊之檢查範圍的尺寸。若檢查寬廣物 品的表面相對於線路感測器照相機之位置均不變時，以上 重疊範圍的尺寸可立即算出，並且其可用來當作處理影像 資料的預定參考尺寸。 然而，若相對於線路感測器照相機之檢查表面的位置 不時會取決於寬廣物品的條件而變化，則重疊檢查範圍的 尺寸也會變化，因此，寬廣物品的檢查表面之影像資料不 ^ 會符合線路感測器照相機所掃瞄的表面之實際條件。 爲了更佳了解下面本發明的背景，可參考圖4至6, 係顯示習知上已使用於實施寬廣物品的檢查方法之裝置。 在圖式中，參考數字30表示藉由一對線路感測器照相機 10，20 (其係配置於物品30的檢查表面30a上，且被定向 而垂直於物品30的檢查表面30a)所檢查之具有寬廣表面 3 〇 a的物品。物品3 0係以如圖4，6中所顯示的箭頭方向 而傳送，而檢查表面30a正常係位於圖5中的線Pc所顯 ^ 示之位置或高度處。置於檢查表面30a上的兩台線路感測 器照相機10，20會沿著物品30的寬度而相互隔離開，使 得照相機1〇，20可分別涵蓋其檢查範圍L10，L20，並且 共同具有檢查範圍L30，其係藉由各自的檢查範圍L10, L20之部分所重疊。當檢查表面30a置於位置Pc時，重 疊檢查範圍L30具有預定尺寸N3。參考標號40係表示照 射檢查範圍L10、L20、L30及其鄰近處的照射燈。爲了淸 楚說明起見，圖式中會忽略藉由照相機1 〇，20所傳送的 影像資料之處理裝置。 (4) 1263773 在上述的檢查裝置中，物品3 0會儘可能地隨著位於 位置Pc處之檢查表面30a而移動，照相機1〇，20之實際 的重疊檢查範圍L30之尺寸係與以上所提及的尺寸N3相 符，並且物品3 0的表面3 0 a會藉由線路感測器照相機1 〇 ，20而進行正確地檢查。然而，若物品30隨著位於上升 位置或高度Pd的檢查表面30a，而以上升位置移動，則線 路感測器照相機1〇，20的檢查範圍L10，L20所重疊之實 ® 際檢查範圍L30(圖5)的尺寸會與預定尺寸N3不相符，其 中，實際重疊範圍L30的尺寸M3會低於預定的重疊範圍 N3。另一方面，若物品30隨著置於比位置Pc低之檢查表 面30a而移動，則重疊的範圍L30之尺寸會變成大於N3 〇 日本專利申請案公開公告號2 0 00-34998 8之圖案訊號 的組合裝置係採用以上問題之解決方式。根據此公開案所 揭示的發明，距離感測器係位於線路感測器的上方位置， ® 如在寬廣物品或鋼板移動的方向所見到的，此距離感測器 係用以量測鋼板的檢查表面與線路感測器之間的相對距離 。此裝置具有計算裝置，其係根據以上所量測的距離，來 算出任兩台相鄰的線路感測器之各自檢查範圍所重疊的檢 查範圍。計算裝置也用以計算因板的檢查表面之任何移動 所造成的重疊範圍之變化，並且會根據計算結果，將來自 感測器的檢查資料組合.。 此檢查方法在檢查具有如鋼板的已知厚度之扁平材料 時，會很有助益。更明確地說，此方法在檢查不同批（每 -8- (5) 1263773 批包含多個已知厚度的薄板）的鋼板時，可有效率地運作 ，這是因爲薄板的檢查表面與線路感測器之間的相對距離 之量測，以及接下來根據量測値之任兩台相鄰的線路感測 器之各自檢查範圍所重疊的檢查範圍之計算一次只會進行 一批。此外，根據此檢查方法，實際重疊範圍與計算出的 重疊範圍之間的誤差會非常小。 然而，根據公開號2 000-349988的檢查方法之昂貴之 # 處在於實施此方法的裝置需要量測鋼板的檢查表面與線路 感測器之間的距離之工具，而且也需要根據此量測，而計 算任兩台相鄰的線路感測器之各自檢查範圍所重疊的檢查 範圍之裝置。此方法在檢查物品（如上表面時常會搖動之 木材膠合板）時，是不利的，這是因爲重疊檢查範圍的計 算値時常不能與實際檢查範圍相符。爲了精確地檢查連續 移動的物品，重疊檢查範圍的計算必須以短時間間隔重複 地運作。若計算延遲，則重疊範圍的計算値與實際値之間 Θ 的誤差會發生。爲了達成精確的檢查，必須降低物品的傳 送速度，而結果會影響檢查效率。 【發明內容】 本發明已有鑑於以上的缺點而達成，因此，本發明之 目的在於提出可解決缺點之寬廣物品的檢查方法。更明確 地說，所揭示者爲將藉由多個感測器照相機所捕捉之寬廣 物品的表面上之分離影像資料組合之方法。 爲了達成以上目的，本發明提供一種物品之檢查方法 (6) 1263773 ，此物品具有寬廣的表面，以供藉由使用複數台感測器照 相機來檢查及移動於橫越其寬度的方向上。根據此方法， 首先，配置感測器照相機與物品的檢查表面隔離開，並且 沿著物品的寬度而相互隔開一間隔，使得感測器照相機分 別在檢查表面上具有檢查範圍，並且任兩台相鄰的感測器 照相機共同共有一爲此兩台相鄰的感測器照相機之檢查範 圍中的部分所重疊之檢查範圍。因此，感測器照相機較佳 • 爲線路感測器照相機，其係可操作來依序地取得或捕捉檢 查表面上的線路影像，並且可操作來產生影像的資料。 寬廣物品之檢查表面上的檢查範圍及其鄰近處係藉由 照射器來照射。藉由發射來自光投射器的光，標記會形成 於重疊共同檢查範圍中的中間位置處。線路標記具有與寬 廣物品之檢查表面中所包含的任何顏色不同之顏色。光投 射器應該爲可發射雷射光束之雷射光束投射器，其會產生 橫越重疊的共同檢查範圍而延伸的線路標記。此外，線路 ® 標記應該出現在重疊的共同檢查範圍之中央。 兩台相鄰的感測器照相機所產生的影像資料會經由計 算而組合在一起。在組合影像資料中，兩台相鄰的感測器 照相機其中之一所捕捉到的一部分影像資料，以及另一台 感測器照相機所捕捉到的一部分影像資料會根據標記而排 除，使得兩台相鄰的照相機之檢查範圍可互補地涵蓋整個 檢查範圍。 換句話說，用於重疊的共同檢查範圍之此兩台相鄰的 感測器照相機所產生的影像資料會以兩台相鄰的感測器照 -10- (7) 1263773 相機的其中一台所捕捉到的一部分影像資料（其係對應於 標記與相鄰於另一台感測器照相機之檢查範圍的一側上之 一台照相機之檢查範圍的一端之間的檢查範圍），以及另 一台感測器照相機所捕捉到的一部分影像資料（其係對應 於標記與相鄰於此一台感測器照相機之檢查範圍的一側上 之另一台照相機之檢查範圍的一端之間的檢查範圍）被排 除以供影像資料的組合如此之方式，經由計算，爲重疊之 ® 共同檢查範圍組合由此兩台相鄰感測器照相機所產生的影 像資料。 對於熟習此項技術者而言，從以下本發明的較佳實施 例之說明（此說明係參考附圖來達成）中，本發明的特性及 優點將會變成更顯然可知，其中： 【實施方式】 下面將配合顯示可用來實施本發明的檢查方法之檢查 裝置的圖1至3，來說明根據本發明之寬廣物品的檢查方 法之較佳實施例。爲了淸楚說明起見，將說明只使用一對 線路感測器照相機的裝置之實施例。 如以上所提及之參考圖4至6所述的裝置，一對線路 感測器照相機1，2 (每台係用以依序地取得或捕捉表面上 的線路影像）係置於物品3上，物品3具有藉由照相機1， 2所檢查的寬廣表面3a，以及藉由任何適當裝置而以如圖 1，3中所顯示的箭頭方向傳送，其具有正常會位於藉由圖 2中的線Pa所顯示之位置或高度之檢查表面3a。兩台線 -11 - (8) 1263773 路感測器照相機1，2係以寬廣物品3的寬度之方向而彼此 對準’並且被定向而實質上垂直於檢查表面3a。照相機 1，2係以照相機1，2分別涵蓋檢查範圍L 1，L 2，並且共 同具有各自檢查範圍L1,L2的部分所重疊與具有預定尺 寸Ν’或對應其的像素之檢查範圍L3的此種方式，而沿 著物品3的寬度相互隔離開。照射燈4係置於檢查表面3 a 之上及鄰近處，以照射檢查範圍LI、L2、L3及其鄰近處 •。 光投射器5係配置於此對線路感測器照相機1 , 2之間 的位置處之物品3之上，如自光發射至寬廣物品3的檢查 表面3a上之重疊檢查範圍L3的中央之頂端所看到的，使 得以短直線的形式之標記6會橫越重疊範圍L3而延伸， 如圖1中之最淸楚地顯示。線路標記6應該爲與檢查表面 3a上所包含的任何顏色不同之顏色。物品3的檢查範圍 3a上之重疊範圍L3的實際尺寸係經由資料處理單元7(其 0 會將處理過的資料傳送到檢查單元（未顯示）），將線路感測 器照相機1，2所傳送的影像資料進行計算而算出。 下面會詳細說明將兩台線路感測器照相機1，2所捕捉 到的重疊檢查範圍L3之影像資料組合的計算。如較早所 述，當寬廣物品3隨著位於位置Pa的檢查表面3a而移動 時，線路感測器照相機1，2係以其具有本身的檢查範圍 Ll，L2，並且會共享具有預定尺寸N，或對應其的像素之 重疊範圍L3之此種方式而設定。 在藉由線路感測器照相機1，2所掃瞄之物品3的檢查 -12- (9) 1263773 表面3 a之每個時刻，如在圖2的前視圖中所見到之右手 邊上的照相機1會偵測與檢查範圍L1的左側末端相距N 1 之內部位置處的線路標記6，而位於反側之左手邊上的照 相機2會偵測與檢查範圍L 2的右側末端相距N 2之內部位 置處的相同線路標記6，如圖2中所顯示。在爲重疊檢查 範圍L3而將來自兩台線路感測器照相機i，2的影像資料 組合中，照相機1所捕捉的部分影像資料（此部分對應於 ^ 圖2中之距離N1的範圍），以及另一台照相機2所捕捉的 部分影像資料（此部分對應於距離N2的範圍）會被排除以 供影像資料的組合，使得每次掃瞄的整個檢查範圍會藉由 兩台相鄰照相機的檢查範圍而互補地涵蓋。藉由如此組合 ’爲重疊範圍L3而藉由兩台分離的線路感測器照相機1, 2所產生的影像資料不會共享部分資料，並且爲重疊範圍 L3而藉由兩台線路感測器照相機1, 2所傳送的影像資料 之組合可輕易且快速地達成。 ® 另一方面，當寬廣物品3具有不同的厚度或搖動表面 ，使得物品3的檢查表面3a以藉由Pb所顯示的上升位置 而移動時，照相機1會偵測與檢查範圍L1的左側末端相 距Μ 1之內部位置處的線路標記6，而照相機2會偵測與 檢查範圍L2的右側末端相距M2之內部位置處的相同線路 標記6。爲了組合用於重疊範圍L3之來自線路感測器照 相機1，2的影像資料，照相機1所捕捉的部分影像資料（ 此部分對應於距離Ml的範圍），以及另一台照相機2所捕 捉的部分影像資料（此部分對應於距離M2的範圍）會被排 -13- (10) 1263773 除以供重疊檢查範圍L 3之影像資料的組合。 顯然可知的是，當物品3隨著位於除了以上位置Pa， Pb之外的位置之檢查表面3a而移動時，爲重疊檢查範圍 L3而組合影像資料的以上方法仍可保持正確。 在檢查以箭頭方向移動之寬廣物品3的表面3a中， 線路感測器照相機1，2所取得的線路影像資料會在未延遲 之下，對其組合進行處理，使得檢查表面3a的情況可精 ®確且及時地檢查出來。 雖然上述已藉由特定實施例來說明本發明，但是要了 解的是，本發明不受限於例示的實施例，而其可以各種改 變及修飾來實施，如下面所例示。 雖然以上的實施例只使用兩台照相機1, 2，但是三台 或更多台的線路感測器照相機可用來檢查寬廣物品3的表 面3a。在此種情況中，兩台或更多台的光投射器5應該用 來使線路標記6產生在任兩台相鄰的線路感測器照相機之 ^ 檢查範圍的各自重疊檢查範圍之中央處。 雖然在以上的實施例中，所配置的光投射器5會使得 線路標記6出現在重疊範圍L3的中央，但是標記6不必 一定需位於重疊範圍L3的中央，而是儘可能地使其位於 重疊檢查範圍內的任何中間位置處之任何位置。在此種情 況中，排除的部分影像資料係根據中間標記來選擇，使得 二台相鄰的照相機之檢查範圍可互補地涵蓋整個檢查範圍 。爲了使重疊範圍L3的檢查精確’以短線的形式之標記 6應該儘可能地細’並且爲了此目的及區別，光較佳應該 -14- (11) 1263773 爲雷射投射器所投射的紅色光束。 應該要注意的是，線路感測器照相機1，2不必一定需 相互對準的配置，使得其檢查範圍Ll，L2會精確地相互 對準，而是爲了使線路感測器照相機1，2的例示及設定簡 化之緣故，其可以檢查範圍Ll，L2未對準的方式來放置 。也要注意的是，儘可能地使兩台照相機1，2的檢查範圍 Ll，L2相互對準，則出現在重疊檢查範圍L3的標記6可 • 以位於重疊範圍L3的點之形式，來取代橫越範圍L3而延 伸的短線。 作爲感測器照相機，爲了能進行顏色辨識及區別，所 以較佳爲彩色感測器照相機。然而，當檢查未出現頂端表 面上的瑕疵之具有單一顏色或只有一些顏色的物品（如塗 色薄膜）之表面時，可使用單色感測器照相機，其能偵測 出明亮度或亮度與待檢查的表面不同之線路標記。 雖然未顯示於圖式中，但是當檢查間歇地傳送分離板 ^ 或薄板上的區域時，可使用區域感測器照相機來取代線路 感測器照相機。在此種情況中，線路標記應該以板或薄板 移動的方向，而延伸整個區域。 若物品中的任何缺陷（如空隙或鬆動）通過線路標記6 的位置，則感測器照相機1 , 2暫時無法偵測出線路標記6 二一日 可 標 合 之組 陷的 缺料 據資 根像 可影 置， 位此 其因 以 。 所來 。 ， 出 成 變計達 不估來 持而置 保方位 置下記 位或標 記方的 標上計 爲的估 因測據 。 偵 根 -15- (12) Ϊ263773 【圖式簡單說明】 圖1係顯示根據本發明之可使用於實施寬廣物品@ $ 查方法之檢查裝置的示意立體透視圖； 圖2係圖1的檢查裝置之示意前視圖； 圖3係圖1的檢查裝置之示意側視圖； 圖4係顯示習知上已使用於實施寬廣物品的檢查方法 之檢查裝置的不意體透視圖， 圖5係圖4的檢查裝置之示意前視圖；以及 圖6係圖4的檢查裝置之示意側視圖。 【主要元件符號說明】 1 線 路 感 測 器 照 相 機 2 線 路 感 測 器 照 相 機 3 物 品 3 a 寬 廣 表 面 4 照 射 燈 5 光 投 射 器 6 標 記 7 資 料 處 理 單 元 10 線 路 感 測 器 照 相 機 20 線 路 感 測 器 照 相 機 30 物 品 3 0a 寬 廣 表 面 40 照 射 燈 -16-1263773 (1) Nine, the invention belongs to the technical field of the invention. The present invention generally relates to a method for inspecting a wide range of articles, and more particularly, to a combination of separate image data captured by a plurality of sensor cameras. The method. [Prior Art] ® Various surface inspection methods have been used so far, which are designed to detect various defects or flaws on the surface of articles in the form of continuous or separate plates or sheets (such as stains, voids, color errors, colors not Uniform, etc.). Some inspection methods can detect the surface of defects of this size. This method of inspection can be used in a variety of applications in many different fields. A device that performs a surface inspection method often uses a sensor camera (such as a c CD line sensor camera, a 3 CCD color line sensor camera, a CCD area sensor camera, etc.) for scanning in a predetermined direction. ^ The surface of the item that continues or moves intermittently. When a single camera is used to inspect a wide range of items, the camera must be isolated from the inspection surface of the item to be sufficiently large to be separated from each other. Phases, external movements, and this separation, reaching degrees. It’s too big to be wide. The low light is less than the domain of the machine. The phase of the g-zone will be compared with the machine. The solution of the measurement machine is the same as the solution of the ruler, and the inspection is based on the inspection. Use the cover to make the surface. The ground can be used to check the image of the machine, and the image can be checked and the image can be ignored. If you can't take it, you will be able to correct it. 5-A (2) (2)•1263773 for the separation of the phase-to-machine phase. The inspection device for multiple sensor cameras placed at a distance from each other allows each camera to cover the item. The specified area in the entire inspection range. Such a device is disclosed, for example, in Japanese Patent Application Laid-Open Publication Nos. H4-166749, H8-281920, and 2001-337042. Methods and apparatus for combining separate image data from individual sensor cameras and then displaying the combined images on a single display unit are well known in the art. However, as is apparent from the publications No. 2001-337042, it is difficult and tricky to accurately position and set multiple sensor cameras so that any two adjacent cameras can cover their respective inspection ranges without The range in which the respective inspection ranges of the portions of the two cameras overlap, or none of the ranges covered by the two adjacent cameras. The above-cited publication No. H8-28 1 920 discloses the configuration of a line sensor camera in which two adjacent cameras share a predetermined size inspection range in which the respective inspection ranges of two adjacent cameras overlap. In an inspection apparatus having such a camera configuration, the image data of the inspection surface of the articles taken by the two separation cameras is processed to combine the image data to conform to the actual image of the surface scanned by the line sensor camera. The combination of the separated images can be achieved, for example, by averaging the image data transmitted from the two cameras, comparing the data from the camera, and preferentially using, for example, larger data, or preferentially using any of the predetermined materials. For images that are processed from two different cameras with appropriate combination of image data, two adjacent line sensing must be properly calculated each time a scan or scan by a line sensor camera is performed.照 -6 ~ (3) 1263773 The size of the inspection range overlapped by the inspection range of the camera. If the position of the wide object is invariant relative to the position of the line sensor camera, the size of the above overlapping range can be calculated immediately and can be used as a predetermined reference size for processing the image data. However, if the position of the inspection surface relative to the line sensor camera varies from time to time depending on the conditions of the wide article, the size of the overlapping inspection range also changes, and therefore, the image data of the inspection surface of the wide article is not Meets the actual conditions of the surface scanned by the line sensor camera. For a better understanding of the background of the invention below, reference is made to Figures 4 through 6 which show apparatus conventionally used for performing inspection methods for wide articles. In the drawings, reference numeral 30 denotes a check by a pair of line sensor cameras 10, 20 (which are disposed on the inspection surface 30a of the article 30 and oriented perpendicular to the inspection surface 30a of the article 30). An item with a wide surface of 3 〇a. The article 30 is conveyed in the direction of the arrow as shown in Figs. 4 and 6, and the inspection surface 30a is normally located at the position or height indicated by the line Pc in Fig. 5. The two line sensor cameras 10, 20 placed on the inspection surface 30a are spaced apart from each other along the width of the article 30, so that the cameras 1 , 20 can cover their inspection ranges L10, L20, respectively, and have a common inspection range. L30, which overlaps by the respective inspection ranges L10, L20. When the inspection surface 30a is placed at the position Pc, the overlap inspection range L30 has a predetermined size N3. Reference numeral 40 denotes an illumination lamp in the irradiation inspection range L10, L20, L30 and its vicinity. For the sake of explanation, the processing means for the image data transmitted by the cameras 1 〇, 20 will be ignored in the drawing. (4) 1263773 In the above-described inspection apparatus, the article 30 is moved as much as possible with the inspection surface 30a at the position Pc, and the actual overlap inspection range L30 of the camera 1A, 20 is the same as mentioned above. The size N3 of the sum matches, and the surface 30 of the item 30 is correctly inspected by the line sensor camera 1 〇, 20. However, if the article 30 moves in the ascending position with the inspection surface 30a at the raised position or height Pd, the inspection range L10, L20 of the line sensor camera 1A, 20 overlaps the actual inspection range L30 ( The size of FIG. 5) may not coincide with the predetermined size N3, wherein the size M3 of the actual overlap range L30 may be lower than the predetermined overlap range N3. On the other hand, if the article 30 is moved with the inspection surface 30a which is placed lower than the position Pc, the size of the overlapped range L30 becomes larger than the pattern signal of the N3 〇 Japanese Patent Application Publication No. 2 0 00-34998 8 The combination device is solved by the above problems. According to the invention disclosed in this publication, the distance sensor is located above the line sensor, ® as seen in the direction of movement of a wide article or steel plate, and the distance sensor is used to measure the inspection of the steel plate. The relative distance between the surface and the line sensor. The apparatus has computing means for calculating the inspection range over which the respective inspection ranges of any two adjacent line sensors overlap based on the distances measured above. The computing device is also used to calculate changes in the extent of overlap due to any movement of the inspection surface of the panel, and the inspection data from the sensors are combined based on the calculations. This inspection method can be helpful when inspecting flat materials having a known thickness such as a steel plate. More specifically, this method works efficiently when inspecting different batches (per -8-(5) 1263773 batches of sheets containing multiple sheets of known thickness) because of the inspection surface and line feel of the sheets. The measurement of the relative distance between the detectors, and then the calculation of the overlapping inspection ranges overlapped by the respective inspection ranges of any two adjacent line sensors according to the measurement, will only be performed once. Furthermore, according to this inspection method, the error between the actual overlap range and the calculated overlap range is very small. However, the expensive method according to the inspection method of the publication No. 2 000-349988 is that the apparatus for carrying out the method requires a tool for measuring the distance between the inspection surface of the steel sheet and the line sensor, and also according to the measurement, And a device for calculating the inspection range in which the respective inspection ranges of the two adjacent line sensors overlap. This method is disadvantageous when inspecting items (wood ply that are often shaken when the surface is as described above) because the calculation of the overlap check range often does not match the actual inspection range. In order to accurately inspect continuously moving items, the calculation of the overlap check range must be repeated repeatedly at short intervals. If the delay is calculated, an error of Θ between the calculation 重叠 of the overlap range and the actual 会 occurs. In order to achieve an accurate inspection, the transfer speed of the item must be reduced, and the result will affect the inspection efficiency. SUMMARY OF THE INVENTION The present invention has been made in view of the above disadvantages, and it is therefore an object of the present invention to provide a method for inspecting a wide article that can solve the disadvantages. More specifically, the disclosed method is a method of combining separate image data on the surface of a wide article captured by a plurality of sensor cameras. In order to achieve the above object, the present invention provides an article inspection method (6) 1263773 which has a wide surface for inspection and movement in a direction across its width by using a plurality of sensors to illuminate the camera. According to this method, first, the sensor camera is configured to be isolated from the inspection surface of the article and spaced apart from each other along the width of the article such that the sensor camera has an inspection range on the inspection surface, respectively, and two Adjacent sensor cameras collectively have an inspection range that overlaps portions of the inspection range for the two adjacent sensor cameras. Accordingly, the sensor camera is preferably a line sensor camera that is operable to sequentially acquire or capture line images on the inspection surface and is operable to produce image data. The inspection range on the inspection surface of a wide article and its vicinity are illuminated by an illuminator. By emitting light from the light projector, the marks are formed at intermediate positions in the overlapping common inspection range. The line mark has a color different from any color contained in the inspection surface of the wide item. The light projector should be a laser beam projector that emits a laser beam that produces a line marker that extends across the overlapping common inspection range. In addition, the Line ® mark should appear in the center of the overlapping common inspection range. The image data produced by two adjacent sensor cameras is combined by calculation. In the combined image data, part of the image data captured by one of the two adjacent sensor cameras and a part of the image data captured by the other sensor camera are excluded according to the mark, so that two The inspection range of adjacent cameras can complementarily cover the entire inspection range. In other words, the image data generated by the two adjacent sensor cameras used for the overlapping common inspection range will be taken by two adjacent sensors in one of the -10- (7) 1263773 cameras. a portion of the captured image data (which corresponds to the inspection range between the end of the inspection range of one of the cameras on the side adjacent to the inspection range of the other sensor camera), and another A portion of the image data captured by the sensor camera (which corresponds to the inspection range between the mark and the end of the inspection range of another camera on the side adjacent to the inspection range of the one sensor camera) ) is excluded for the combination of image data in such a way that, by calculation, the image data generated by the two adjacent sensor cameras is combined for the overlapped ® common inspection range. The features and advantages of the present invention will become more apparent from the following description of the preferred embodiments of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the inspection method for a wide article according to the present invention will be described with reference to Figs. 1 to 3 showing an inspection apparatus which can be used to carry out the inspection method of the present invention. For the sake of clarity, an embodiment of a device that uses only a pair of line sensor cameras will be described. Referring to the apparatus described above with reference to Figures 4 to 6, a pair of line sensor cameras 1, 2 (each for sequentially acquiring or capturing a line image on the surface) is placed on the article 3. The article 3 has a wide surface 3a inspected by the cameras 1, 2, and is conveyed in the direction of the arrow as shown in Figures 1, 3 by any suitable means, which has a line normally located by Figure 2 The inspection surface 3a of the position or height displayed by Pa. Two lines -11 - (8) 1263773 The road sensor cameras 1, 2 are aligned with each other in the direction of the width of the wide article 3 and are oriented substantially perpendicular to the inspection surface 3a. The cameras 1, 2 are respectively covered by the cameras 1, 2, and have inspection ranges L1, L2, respectively, and have portions of the respective inspection ranges L1, L2 overlapping with the inspection range L3 having a predetermined size Ν' or a pixel corresponding thereto In a manner, they are separated from each other along the width of the article 3. The illumination lamp 4 is placed above and adjacent to the inspection surface 3a to illuminate the inspection ranges LI, L2, L3 and their vicinity. The light projector 5 is disposed above the article 3 at a position between the line sensor cameras 1, 2, such as from the light emission to the top of the center of the overlap inspection range L3 on the inspection surface 3a of the wide article 3. It is seen that the mark 6 in the form of a short straight line extends across the overlap range L3, as shown most schematically in FIG. The line mark 6 should be a color different from any of the colors contained on the inspection surface 3a. The actual size of the overlapping range L3 on the inspection range 3a of the article 3 is transmitted via the data processing unit 7 (the 0 transmits the processed material to the inspection unit (not shown)), and transmits the line sensor cameras 1, 2 The image data is calculated and calculated. The calculation of the combination of the image data of the overlapping inspection range L3 captured by the two line sensor cameras 1, 2 will be described in detail below. As described earlier, when the wide item 3 moves with the inspection surface 3a located at the position Pa, the line sensor camera 1, 2 has its own inspection range L1, L2, and is shared with a predetermined size N Or set in such a manner as to correspond to the overlap range L3 of the pixels. At each moment of the inspection -12-(9) 1263773 surface 3a of the article 3 scanned by the line sensor camera 1, 2, the camera on the right hand side as seen in the front view of Fig. 2 1 detects the line mark 6 at an internal position N 1 from the left end of the inspection range L1, and the camera 2 on the left-hand side of the opposite side detects the inside of the right end of the inspection range L 2 by N 2 The same line mark 6 at the location, as shown in Figure 2. In the image data combination from the two line sensor cameras i, 2 for the overlap check range L3, part of the image data captured by the camera 1 (this portion corresponds to the range of the distance N1 in FIG. 2), and Part of the image data captured by the other camera 2 (this portion corresponds to the range of the distance N2) is excluded for the combination of the image data, so that the entire inspection range of each scan is checked by two adjacent cameras. Scope and complementary coverage. The image data generated by the two separate line sensor cameras 1, 2 by the combination of the 'overlap range L3' does not share part of the data, and the two line sensor cameras are overlapped by the range L3. 1, 2 The combination of image data transmitted can be easily and quickly achieved. On the other hand, when the wide article 3 has a different thickness or a rocking surface such that the inspection surface 3a of the article 3 moves in the ascending position displayed by Pb, the camera 1 detects the distance from the left end of the inspection range L1. The line mark 6 at the inner position of Μ 1 and the camera 2 detects the same line mark 6 at the inner position M2 from the right end of the inspection range L2. In order to combine the image data from the line sensor cameras 1, 2 for overlapping the range L3, part of the image data captured by the camera 1 (this portion corresponds to the range of the distance M1), and the portion captured by the other camera 2 The image data (this part corresponds to the range of the distance M2) is divided by the line 13-(10) 1263773 by the combination of the image data for the overlap check range L3. It is apparent that when the article 3 is moved with the inspection surface 3a located at a position other than the above positions Pa, Pb, the above method of combining the image data for overlapping the inspection range L3 can be kept correct. In the surface 3a of the wide article 3 which is moved in the direction of the arrow, the line image data acquired by the line sensor cameras 1, 2 will be processed without delay, so that the condition of the inspection surface 3a can be refined. ® check it out in a timely and timely manner. While the invention has been described with respect to the specific embodiments thereof, it is understood that the invention is not limited to the illustrated embodiments, but may be practiced in various modifications and changes, as illustrated below. Although the above embodiment uses only two cameras 1, 2, three or more line sensor cameras can be used to inspect the surface 3a of the wide article 3. In this case, two or more of the light projectors 5 should be used to cause the line marks 6 to be generated at the center of the respective overlapping inspection ranges of the inspection ranges of any two adjacent line sensor cameras. Although in the above embodiment, the configured light projector 5 causes the line mark 6 to appear in the center of the overlap range L3, the mark 6 does not necessarily have to be located in the center of the overlap range L3, but rather overlaps as much as possible. Check any position at any intermediate position within the range. In this case, the excluded image data is selected based on the intermediate mark so that the inspection range of the two adjacent cameras can complement the entire inspection range. In order to make the inspection of the overlap range L3 accurate 'the mark 6 in the form of a short line should be as thin as possible' and for this purpose and difference, the light should preferably be -14-(11) 1263773 for the red light beam projected by the laser projector . It should be noted that the line sensor cameras 1, 2 do not necessarily have to be aligned with each other such that their inspection ranges L1, L2 are precisely aligned with each other, but for the line sensor cameras 1, 2 For the sake of simplicity of illustration and setting, it can be placed in such a way that the range L1 and L2 are misaligned. It should also be noted that, as much as possible, the inspection ranges L1, L2 of the two cameras 1, 2 are aligned with each other, and the mark 6 appearing in the overlap check range L3 can be replaced by a point located at the overlap range L3. A short line that extends across the range L3. As a sensor camera, a color sensor camera is preferred in order to enable color recognition and discrimination. However, when inspecting the surface of an article having a single color or only a few colors (such as a coloring film) on the top surface, a monochrome sensor camera capable of detecting brightness or brightness can be used. Line markings with different surfaces to be inspected. Although not shown in the drawings, an area sensor camera can be used in place of the line sensor camera when the inspection intermittently conveys the area of the separation plate ^ or the sheet. In this case, the line mark should extend the entire area in the direction in which the board or sheet moves. If any defect in the item (such as a gap or looseness) passes the position of the line mark 6, the sensor camera 1, 2 is temporarily unable to detect the missing item of the line mark 6 that can be labeled for two days. Like the shadow, this is why. Come here. , the calculation of the variable is not estimated to be held and the position of the record is marked on the mark or the standard of the mark. Detective Roots -15- (12) Ϊ 263773 [Simplified Schematic Description] Fig. 1 is a schematic perspective perspective view showing an inspection apparatus which can be used to implement a wide article @$ inspection method according to the present invention; Fig. 2 is an inspection apparatus of Fig. 1. Figure 3 is a schematic side view of the inspection apparatus of Figure 1; Figure 4 is an unintentional perspective view showing an inspection apparatus that has been conventionally used for performing inspection methods for wide articles, and Figure 5 is an inspection of Figure 4. A schematic front view of the device; and Figure 6 is a schematic side view of the inspection device of Figure 4. [Description of main component symbols] 1 Line sensor camera 2 Line sensor camera 3 Item 3 a Wide surface 4 Illumination lamp 5 Light projector 6 Marker 7 Data processing unit 10 Line sensor camera 20 Line sensor camera 30 Item 3 0a Wide surface 40 Illumination lamp-16-