201005679 九、發明說明： 【發明所屬之技術領域】 本發明涉及一種顯像裝置及其圖像放大方法。 【先前技術】 隨著數碼攝像裝置之普及，越來越多之人喜歡用數石馬 攝像襄置來記錄生活中之點點滴滴。比如，人們去旅遊或 於生活中會拍下—些照片。有時可能會採取遠景拍攝，這 樣會使得人物之影像比較小。為了將人物之圖像放大，一 般會將拍攝之圖像進行數位放大。 然而’，現有之顯像裝置如數碼相框，不能只針對圖像 中之人物肖像進行局部放大。如圖工所示，想將人物之肖 像進行放大，必須將整個圖像同時進行放大。放大後之人 物肖像可此無法全部完整地顯示於圖像中（如圖2所示）。 【發明内容】 口此有必要^供一種可確保放大後之人物圖像完整 ❹地顯示於晝面中之顯像裝置及其圖像放大方法。 一種顯像裝置，其包括： 一顯示單元，用於顯示圖像； 一人臉識別單元，用於識別圖像中之人臉，並框選人 臉區域； 一中心點尋找單元，用於尋找框選之人臉區域之中心 點； 一模式選擇單元’以中心點尋找單元確認之人臉區域 内之中心點為中心框選待放大之圖像區域； 201005679 -圖像放大單元，用於將模式選擇單元框選之待放大 之圖像區域進行放大。 一種圖像放大方法’其包括以下步驟： (1)讀取圖像； (2 )識別人臉，並框選人臉區域； (3 )尋找人臉區域之中·心點； (4)以確認之中心點為中心框選待放大之圖像區域； ❹ （5 )對待放大之圖像區域進行圖像放大。 相較於先前技術，該中心點尋找單元從框選之人臉區 域内識別中心點，模式選擇單元以中心點尋找單元識別之 人臉區域内之令心點為中心框選待放大之圖像區域，圖像 放大單7G將模式選擇單元框選之待放大之圖像區域進行放 大，因此可確保放大後之人物圖像完整地顯示於圖像中。 【實施方式】 以下將結合附圖對本發明作進一步之詳細說明。 籲 明參閱圖3，為本發明提供之一種顯像裝置；[〇〇,其可 為具有顯像功能之數碼相機、電子像框、個人數位助理 (PDA)等電子設置。該顯像裝置1〇〇包括一存儲單元1〇、 一顯不單兀20、一人臉識別單元3〇、一中心點尋找單元 40、一模式選擇單元5〇及一圖像放大單元6〇。該存儲單元 10内存儲有多張圖像。該顯示單元2〇用於讀取存儲單元 10内之多張圖像並顯示該圖像。該人臉識別單元3〇用於識 別圖像中之人臉，並框選人臉區域。該中心點尋找單元 用於尋找人臉區域之中心點。該模式選擇單元5〇内存儲有 201005679 .複數預先設定之圖像放大架構，並以中心點尋找單元扣確 ‘認之人臉區域内之中心點為中心框選 該圖像放大單元㈣於對模式選擇單元％框選出之待放 大之圖像區域進行放大。 该存儲早7G 1G可為-半導體記憶體或磁性記憶體，優 選地’為電可擦記憶體。 該顯示單元20用於讀取及顯示該存儲單元1G内存儲 ❹之圖像。本實施方式中，該顯示單元2〇為__液日日日顯示幕， 優選地，該顯示單元2〇為可觸摸式。 該人臉識別單元30用於從顯示單元20顯示之圖像中 識別人臉，並框選圖像中之人臉區域。 該中心點尋找單元40用於從人臉識別單元30框選之 人臉區域内識別中心點。例如，如圖4所示，顯示單元2〇 之尺寸為10〇mmX100mm，本實施方式中該顯示單元2〇 默認其左下方為原點之二維座標。因為人臉識別單元如框 ❷選之人臉區域為-方形，具有四個角，根據四個角之位置 座標可得出該人臉區域之中心點。此時，中心點尋找單元 40以框選之人臉區域之中心點為中心。當圖像中同時出現 複數人臉時，每個人臉區域都會被人臉朗單元3G所框選 (如圖5所示），每個人臉區域分別對應—框，此時，中心 點尋找單元40以相隔最遠之框之對角連線之中心點〇為中 。可理解’也可根據不同之要求設置座標原點，該人臉 識別單元30也可用一方形邊框框選所有人臉。 違模式選擇單元50内存倚有複數預先設定之圖像放大 201005679 • 架構，並以中心點尋找單元40識別之人臉區域内之中心點 .0為中心框選待放大之圖像區域。該模式選擇單元50内預 先設定之圖像放大區域之面積小於該顯示單元2〇之面積。 如模式選擇單元50同時預存有10inm X 10mm、40mm X 40mm、或90mm X 90mm等圖像放大架構。選定好一圖像 放大架構後’以中心點尋找單元4〇識別之人臉區域内之中 心點Ο為中心框選待放大之圖像區域，優選地，框選待放 ❿大之圖像區域包括圖像中之所有人臉區域。 該圖像放大單元60用於對模式選擇單元5〇框選出之 待放大之圖像區域進行放大。該圖像放大單元6〇將模式選 擇單7C 50框選之待放大之圖像區域移至顯示單元2〇之中 心區域位置，優選地，將中心點尋找單元4〇識別之中心點 〇與顯示單元20上之中心點〇,才目重合。該圖像放大單元 60並針對框選之待放大之圖像區域放大到顯示單元之 積大i例如，圖6疋圖4之圖像經過放大後之圖像， ❿圖4中，模式選擇單元5〇套用之是4〇mm χ 之放大 木構，因此，該模式選擇單元5〇以中心點尋找單元仞確 認之人臉區域内之中心點〇為中心框選一 4〇mm χ 4〇随 預設面積大小之待放大之圖像區域，圖像放大單元60將該 框選之，放Α之圖像區域移至顯示單元2G之中心並針對模 式選擇單7L 50框選之待放大之圖像區域進行25倍率放大 至顯示單元20之面積大小，得到圖6所示圖像。 。。該顯像裝置100還可進一步包括一拍攝單元7〇，該拍 攝早几70用於攝取影像，且該攝取之影像存儲於該存儲單 201005679 元10内，或通過該顯示單元20顯示。 請參閱圖7,為本發明之圖像放大方法，其包括以下步 驟： S102 :讀取圖像； 該顯示單元20從該存儲單元10内讀取存儲之多張圖 像。 S104 :識別人臉，並框選人臉區域； ©可採用人臉識別技術針對顯示之圖像進行人臉識別。 如基於特徵臉（PCA)之人臉識別方法、線段Hausdorff距離 (LHD)之人臉識別方法或支援向量機（SVM)之人臉識別方 法等。 S106 :識別人臉區域之中心點； 該顯示單元20默認其左下方為原點之二維座標。因為 人臉識別單元30框選之人臉區域為一方形，具有四個角， 根據四個角之位置座標可得出該人臉區域之中心點。 ❹ S108 :以確認之中心點0為中心框選待放大之圖像區 域； S110 :對待放大之圖像區域進行圖像放大。 將待放大之圖像區域移至顯示單元2 0之中心並針對待 放大之圖像區域進行放大至顯示單元20之面積大小。 該圖像放大方法，於步驟S102前進一步包括攝取影 像。該攝像單元70攝取影像，將該攝取之影像進行存儲後 進行圖像放大處理或不經過存儲而直接進行圖像放大處 201005679 . 該圖像放大方法，於步驟S110後還進一步包括〜 - 驟：將放大後之圖像進行存儲。 ’ 該中心點尋找單元從框選之人臉區域内識別中心點， 模式選擇單元以中心，點尋找單元識別之人臉區域内之中心 點為中心框選待放大之圖像區域，圖像放大單元將模式^ 擇單元框選之待放大之圖像區域進行放大，因此可確保放 大後之人物圖像完整地顯示於圖像中。 ❹ 綜上所述，本發明確已符合發明專利之要件，遂依法 提出專利申請。惟，以上所述者僅為本發明之較佳實施方 式，自不能以此限制本案之申請專利範圍。舉凡熟悉本案 技藝之人士援依本發明之精神所作之等效修飾或變化，皆 應涵蓋於以下申請專利範圍内。 【圖式簡單說明】 圖1係放大前之圖像； 圖2係圖1中之圖像放大後之圖像； 參 圖3係本發明提供之顯像裝置之結構示意圖； 圖4係經過圖3中之顯像裝置顯示之圖像； 圖5係經過圖3中之顯像裝置顯示之另一圖像； 圖6係圖4之圖像經過放大後之圖像； 圖7係本發明提供之圖像放大方法流程圖。 【主要元件符號說明】 顯像裝置 100 存儲單元 10 顯示單元 20 201005679 人臉識別單元 30 中心點尋找單元 40 模式選擇單元 50 圖像放大單元 60 拍攝單元 70201005679 IX. Description of the Invention: [Technical Field] The present invention relates to a developing device and an image magnifying method thereof. [Prior Art] With the popularity of digital video cameras, more and more people like to use the stone horse camera to record the bits and pieces of life. For example, people go to travel or take pictures in life. Sometimes a distant shot may be taken, which will make the image of the character smaller. In order to enlarge the image of the person, the captured image is generally digitally magnified. However, existing imaging devices such as digital photo frames cannot be partially enlarged only for portraits in images. As shown in the figure, if you want to enlarge the portrait of a person, you must enlarge the entire image at the same time. The enlarged portrait of the person can not be completely displayed in the image (as shown in Figure 2). SUMMARY OF THE INVENTION It is necessary to provide a developing device and an image magnifying method thereof for ensuring that an enlarged image of a person is displayed completely in the face. A developing device comprising: a display unit for displaying an image; a face recognition unit for recognizing a face in the image and selecting a face region; a center point searching unit for finding a frame Selecting the center point of the face area; a mode selection unit selects the image area to be enlarged by centering on the center point in the face area confirmed by the center point finding unit; 201005679 - Image enlargement unit for mode Select the area of the image to be enlarged to enlarge it. An image enlargement method includes the following steps: (1) reading an image; (2) recognizing a face and selecting a face region; (3) finding a middle face of the face region; (4) The center point of the confirmation is the image area to be enlarged by the center frame; ❹ (5) The image area to be enlarged is enlarged. Compared with the prior art, the center point searching unit identifies the center point from the framed face area, and the mode selection unit selects the image to be enlarged with the center point in the face area recognized by the center point finding unit as the center frame. In the area, the image enlargement unit 7G enlarges the image area to be enlarged selected by the mode selection unit frame, thereby ensuring that the enlarged person image is completely displayed in the image. [Embodiment] Hereinafter, the present invention will be further described in detail with reference to the accompanying drawings. 3 is a display device provided by the present invention; [〇〇, which can be an electronic device such as a digital camera with an imaging function, an electronic picture frame, a personal digital assistant (PDA), and the like. The developing device 1A includes a storage unit 1A, a display unit 20, a face recognition unit 3A, a center point finding unit 40, a mode selection unit 5A, and an image enlargement unit 6A. A plurality of images are stored in the storage unit 10. The display unit 2 is for reading a plurality of images in the storage unit 10 and displaying the image. The face recognition unit 3 is for recognizing a face in an image and selecting a face region. The center point finding unit is used to find the center point of the face area. The mode selection unit 5 存储 stores 201005679 . The plurality of preset image enlargement structures, and selects the image enlargement unit (4) by centering on the center point in the face area of the center point finding unit. The image selection unit % box selects the image area to be enlarged to be enlarged. The storage 7G 1G may be a semiconductor memory or a magnetic memory, preferably an electrically erasable memory. The display unit 20 is configured to read and display an image stored in the storage unit 1G. In the present embodiment, the display unit 2 is a liquid day and day display screen, and preferably, the display unit 2 is touchable. The face recognition unit 30 is for recognizing a face from an image displayed by the display unit 20, and frames a face region in the image. The center point finding unit 40 is for identifying the center point from the face area framed by the face recognition unit 30. For example, as shown in FIG. 4, the size of the display unit 2〇 is 10〇mm×100mm. In the present embodiment, the display unit 2〇 defaults to the lower left side as the two-dimensional coordinate of the origin. Because the face recognition unit has a face-selected face area of a square shape and has four corners, the center point of the face area can be obtained according to the coordinates of the positions of the four corners. At this time, the center point finding unit 40 is centered on the center point of the framed face area. When multiple faces appear in the image at the same time, each face area is selected by the face unit 3G (as shown in FIG. 5), and each face area corresponds to a frame respectively. At this time, the center point searching unit 40 The center point of the diagonal line connecting the farthest frame is centered. It can be understood that the coordinate origin can also be set according to different requirements, and the face recognition unit 30 can also select all faces by a square frame. The violation mode selection unit 50 relies on a plurality of pre-set image enlargements. 201005679 • The architecture and the center point in the face area identified by the center point finding unit 40. The center frame selects the image area to be enlarged. The area of the image enlargement area preset in the mode selection unit 50 is smaller than the area of the display unit 2''. For example, the mode selection unit 50 prestores an image enlargement structure such as 10 inm X 10 mm, 40 mm X 40 mm, or 90 mm X 90 mm. After selecting an image enlargement structure, the image area to be enlarged is selected as the center frame by the center point in the face area recognized by the center point search unit 4, and preferably, the image area to be enlarged is selected. Includes all face areas in the image. The image enlarging unit 60 is configured to enlarge the image area to be enlarged selected by the mode selecting unit 5. The image enlargement unit 6 moves the image area to be enlarged, which is selected by the mode selection sheet 7C 50, to the central area position of the display unit 2〇, preferably, the center point and display of the center point finding unit 4〇 The center point on the unit 20 is only coincident. The image amplifying unit 60 enlarges the image area to be enlarged to the display unit by i. For example, the image of the image of FIG. 6 and FIG. 4 is enlarged, and in FIG. 4, the mode selection unit 5〇 is applied to the enlarged wood structure of 4〇mm ,, therefore, the mode selection unit 5〇 selects a 4〇mm χ 4〇 with the center point 内 in the face area confirmed by the center point finding unit 〇 The image area to be enlarged is preset by the image enlargement unit 60, and the image enlargement unit 60 selects the frame, and the image area of the image is moved to the center of the display unit 2G and is selected for the mode selection sheet 7L 50 to be enlarged. The image area is enlarged by 25 times to the area size of the display unit 20, and the image shown in Fig. 6 is obtained. . . The developing device 100 may further include a photographing unit 7A for taking images 70, and the captured images are stored in the memory sheet 201005679 or displayed by the display unit 20. Referring to FIG. 7, an image enlargement method of the present invention includes the following steps: S102: reading an image; the display unit 20 reads the stored plurality of images from the storage unit 10. S104: Recognizing a face and selecting a face area; © Face recognition technology may be used for face recognition on the displayed image. For example, a face recognition method based on a feature face (PCA), a face recognition method based on a line segment Hausdorff distance (LHD), or a face recognition method using a support vector machine (SVM). S106: Identify a center point of the face area; the display unit 20 defaults to the lower left side as a two-dimensional coordinate of the origin. Because the face area selected by the face recognition unit 30 is a square with four corners, the center point of the face area can be obtained according to the position coordinates of the four corners. ❹ S108: Select the image area to be enlarged with the center point 0 of the confirmation as the center frame; S110: enlarge the image area to be enlarged. The image area to be enlarged is moved to the center of the display unit 20 and enlarged to the area size of the display unit 20 for the image area to be enlarged. The image enlargement method further includes taking in an image before step S102. The image capturing unit 70 captures the image, stores the captured image, and performs image enlargement processing or directly performs image enlargement without storing. 201005679. The image enlargement method further includes after step S110. The enlarged image is stored. The center point searching unit identifies the center point from the framed face area, and the mode selection unit selects the image area to be enlarged centered on the center point in the face area recognized by the point finding unit, and the image is enlarged. The unit enlarges the area of the image to be enlarged by selecting the mode, so that the enlarged image of the person is completely displayed in the image.综 In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application in accordance with the law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the present invention are intended to be included within the scope of the following claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an image before enlargement; FIG. 2 is an enlarged image of the image in FIG. 1; FIG. 3 is a schematic structural view of a developing device provided by the present invention; Figure 3 is an image displayed by the developing device of Figure 3; Figure 6 is an enlarged image of the image of Figure 4; Figure 7 is provided by the present invention A flowchart of an image enlargement method. [Description of main component symbols] Development device 100 Storage unit 10 Display unit 20 201005679 Face recognition unit 30 Center point search unit 40 Mode selection unit 50 Image enlargement unit 60 Shooting unit 70
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