TWI385475B - Image pick-up device and flash control method thereof - Google Patents
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Description
本發明涉及一種影像擷取裝置及其閃光控制方法。 The invention relates to an image capturing device and a flash control method thereof.
目前,影像擷取裝置如數位相機等常設有電子閃光燈,以在光線不足之拍攝條件下補償被拍攝物之亮度。電子閃光燈之控制方式包括自動式與手動式。自動式一般是先通過自動測距模組或者閃光燈預閃之方式自動測得一目標物與影像擷取裝置之間之距離,並根據影像擷取裝置之光圈值,自動控制閃光燈之閃光強度。手動式是由拍攝者自行設定閃光燈之閃光強度。但經驗不足之拍攝者常會錯誤估計被拍攝物與影像擷取裝置之間之距離,以及對閃光燈之閃光強度所對應之照亮範圍不夠瞭解,因此常易選擇錯誤之閃光強度,造成曝光過度或者曝光不足。 At present, image capturing devices such as digital cameras often have an electronic flash to compensate for the brightness of the subject under low light conditions. Electronic flash control methods include automatic and manual. The automatic type generally automatically measures the distance between a target and the image capturing device by means of an automatic ranging module or flash pre-flashing, and automatically controls the flashing intensity of the flash according to the aperture value of the image capturing device. Manual mode is the flash intensity of the flash set by the photographer. However, an inexperienced photographer often misjudges the distance between the subject and the image capturing device, and does not know enough about the range of illumination corresponding to the flash intensity of the flash. Therefore, it is often easy to select the wrong flash intensity, resulting in overexposure or Underexposed.
有鑒於此,有必要提供一種可顯示閃光燈照亮之景物範圍之影像擷取裝置及其閃光控制方法。 In view of this, it is necessary to provide an image capturing device capable of displaying a range of scenes illuminated by a flash and a flash control method thereof.
一種影像擷取裝置,其包括一成像模組、一閃光模組、一中央處理模組及一人機介面。所述成像模組用於感測外部之場景,形成影像信號,並將影像信號輸送到所述中央處理模組。所述閃光模組用於在拍攝時閃光以補償被拍攝物之亮度。所述中央處理模組用於處理來自所述成像模組之影像信號,並將處理後之影像信號輸出到所述人機介面,以及在所述人機介面上顯示至少兩個預設 閃光距離供拍攝者選擇,並當拍攝者選擇其中一預設閃光距離時,在該人機介面上顯示在該預設閃光距離之條件下所述閃光模組所能照亮之景物範圍。該中央處理模組根據拍攝者選擇之預設閃光距離控制所述閃光模組在拍攝時閃光。 An image capturing device includes an imaging module, a flash module, a central processing module and a human machine interface. The imaging module is configured to sense an external scene, form an image signal, and transmit the image signal to the central processing module. The flash module is used to flash when shooting to compensate for the brightness of the subject. The central processing module is configured to process image signals from the imaging module, and output the processed image signals to the human-machine interface, and display at least two presets on the human-machine interface The flash distance is selected by the photographer, and when the photographer selects one of the preset flash distances, the range of the scene that the flash module can illuminate under the preset flash distance is displayed on the human machine interface. The central processing module controls the flash module to flash when shooting according to a preset flash distance selected by the photographer.
一種應用於影像擷取裝置之閃光控制方法,所述影像擷取裝置包括一閃光模組,該閃光控制方法包括以下步驟:感測一場景,得到並預覽所述場景之影像;提供至少兩個預設閃光距離供拍攝者選擇;根據拍攝者選擇之預設閃光距離,顯示可被所述閃光模組照亮之景物範圍;根據拍攝者選擇之預設閃光距離,控制所述閃光模組進行閃光,並拍攝該場景。 A flash control method applied to an image capture device, the image capture device comprising a flash module, the flash control method comprising the steps of: sensing a scene, obtaining and previewing an image of the scene; providing at least two The preset flash distance is selected by the photographer; according to the preset flash distance selected by the photographer, the range of the scene that can be illuminated by the flash module is displayed; and the flash module is controlled according to the preset flash distance selected by the photographer. Flash and shoot the scene.
相較於先前技術,所述影像擷取裝置及其閃光控制方法可讓拍攝者自行選擇閃光模組之閃光距離,並顯示該閃光距離條件下能被所述閃光模組照亮之景物範圍,使拍攝者容易選擇合適之閃光距離,以獲得較好之曝光效果。 Compared with the prior art, the image capturing device and the flash control method thereof allow the photographer to select the flash distance of the flash module and display the range of the scene that can be illuminated by the flash module under the flash distance. It is easy for the photographer to select a suitable flash distance for better exposure.
下面將結合附圖,舉以下較佳實施方式並配合圖式詳細描述如下。 The following preferred embodiments will be described in detail below with reference to the accompanying drawings.
請參閱圖1與圖2,其為本發明之影像擷取裝置1。該影像 擷取裝置1包括一成像模組10、一閃光模組20、一自動測距模組30、一中央處理模組40、一人機介面50及一存儲模組60。 Please refer to FIG. 1 and FIG. 2, which are the image capturing device 1 of the present invention. The image The capture device 1 includes an imaging module 10, a flash module 20, an automatic ranging module 30, a central processing module 40, a human interface 50, and a storage module 60.
所述成像模組10用於感測外部場景,形成影像信號,並將影像信號輸送到所述中央處理模組40。該成像模組10可以係鏡頭及影像感測器。 The imaging module 10 is configured to sense an external scene, form an image signal, and transmit the image signal to the central processing module 40. The imaging module 10 can be a lens and an image sensor.
所述閃光模組20用於在拍攝時閃光以補償被拍攝物之亮度。所述閃光模組20具有一最大閃光距離,該最大閃光距離由該閃光模組20之本身性能決定。所述閃光模組20可以係閃光燈系統。 The flash module 20 is used to flash when shooting to compensate for the brightness of the subject. The flash module 20 has a maximum flash distance determined by the performance of the flash module 20 itself. The flash module 20 can be a flash system.
所述自動測距模組30用於獲得所述成像模組10感測之影像中之景物與所述影像擷取裝置1之間之距離,並將結果提供給所述中央處理模組40。優選地,該自動測距模組30先在所述場景中選擇至少兩個參照物,並測得該至少兩個參照物與所述影像擷取裝置1之間之距離,然後根據該至少兩個參照物在所述影像中之位置,確定所述場景與影像之投影關係,再根據該影像中其它景物與該至少兩個參照物之間之位置關係以及所述場景與影像之投影關係,計算得到該影像中其它景物與該影像擷取裝置1之間之距離。所述自動測距模組30為內置之測距器。 The automatic ranging module 30 is configured to obtain a distance between the scene in the image sensed by the imaging module 10 and the image capturing device 1 , and provide the result to the central processing module 40 . Preferably, the automatic ranging module 30 first selects at least two reference objects in the scene, and measures a distance between the at least two reference objects and the image capturing device 1, and then according to the at least two Positioning of the reference object in the image, determining a projection relationship between the scene and the image, and then according to a positional relationship between the other scenes and the at least two reference objects in the image, and a projection relationship between the scene and the image, The distance between other scenes in the image and the image capturing device 1 is calculated. The automatic ranging module 30 is a built-in range finder.
所述中央處理模組40包括一影像處理單元42及一控制單元44。 The central processing module 40 includes an image processing unit 42 and a control unit 44.
所述影像處理單元42用於處理來自所述成像模組10之影像信號,並將處理後之影像信號存儲到所述存儲模組60 中,同時輸出到所述人機介面50。 The image processing unit 42 is configured to process image signals from the imaging module 10 and store the processed image signals in the storage module 60. At the same time, it is output to the human machine interface 50 at the same time.
所述控制單元44用於在所述人機介面50上顯示至少兩個預設閃光距離以供拍攝者選擇,並當拍攝者選擇其中一預設閃光距離時,該控制單元44根據該預設閃光距離對應之所述閃光模組20之照亮範圍以及所述影像中之景物與所述影像擷取裝置1之間之距離,在該人機介面50上顯示在該預設閃光距離之條件下該閃光模組20所能照亮之景物範圍,以提示拍攝者其所關注之目標物能否被該閃光模組20照亮。所述供選擇之預設閃光距離可以為從0到該閃光模組20之最大閃光距離中之任意數值,且各預設閃光距離所對應之所述閃光模組20之照亮範圍預先設定。 The control unit 44 is configured to display at least two preset flash distances on the human machine interface 50 for the photographer to select, and when the photographer selects one of the preset flash distances, the control unit 44 according to the preset The illumination range corresponding to the flash module 20 and the distance between the scene in the image and the image capturing device 1 are displayed on the human interface 50 at the preset flash distance. The range of the scene that the flash module 20 can illuminate to indicate whether the target object of the photographer can be illuminated by the flash module 20. The optional preset flash distance may be any value from 0 to the maximum flash distance of the flash module 20, and the illumination range of the flash module 20 corresponding to each preset flash distance is preset.
該控制單元44可根據所述自動測距模組30提供之影像中之景物與所述影像擷取裝置1之間之距離,以及拍攝者選擇之預設閃光距離所對應之所述閃光模組20之照亮範圍,找出位於該照亮範圍內之景物,並改變該照亮範圍內之景物在所述人機介面50上對應之畫素點之亮度,以顯示所述閃光模組20所能照亮之景物範圍。優選地,該控制單元44通過增加該照亮範圍內之景物在所述人機介面50上對應之畫素點之亮度,以在該人機介面50上形成一增亮區域,用於表示所述閃光模組20所能照亮之景物範圍。該控制單元44亦可增加位於照亮範圍邊緣之景物在該人機介面50上對應之畫素點之亮度,形成一條包圍照亮範圍內之景物之輔助線,用以向拍攝者提示可被該閃光模組20照亮之景物範圍。 The control unit 44 can be configured according to the distance between the scene in the image provided by the automatic ranging module 30 and the image capturing device 1 and the flash module corresponding to the preset flash distance selected by the photographer. The illumination range of 20, finds the scene located in the illumination range, and changes the brightness of the corresponding pixel point of the scene in the illumination range on the human interface 50 to display the flash module 20 The range of scenery that can be illuminated. Preferably, the control unit 44 forms a brightness-increasing area on the human-machine interface 50 by increasing the brightness of the corresponding pixel point of the scene in the illumination range on the human-machine interface 50. The range of scenes that the flash module 20 can illuminate. The control unit 44 can also increase the brightness of the corresponding pixel point of the scene located on the edge of the illumination range on the human interface 50 to form an auxiliary line surrounding the scene in the illumination range, so as to prompt the photographer to be The flash module 20 illuminates the range of scenery.
當拍攝者進行拍攝時,該控制單元44根據拍攝者所選之預設閃光距離控制所述閃光模組20進行閃光。其中,當選擇之預設閃光距離為0時,該閃光模組20不閃光。所述中央處理單元40包括數位訊號處理器、自動增益控制器、模數轉換器等。 When the photographer performs shooting, the control unit 44 controls the flash module 20 to perform flashing according to the preset flash distance selected by the photographer. Wherein, when the preset preset flash distance is 0, the flash module 20 does not flash. The central processing unit 40 includes a digital signal processor, an automatic gain controller, an analog to digital converter, and the like.
所述人機介面50用於將來自該中央處理模組40之信號轉化為拍攝者可視之影像,並根據拍攝者之操作將拍攝者選擇之預設閃光距離輸入到所述中央處理模組40。所述人機介面50可以係顯示器及按鍵或者觸模式液晶顯示器。 The human interface 50 is configured to convert the signal from the central processing module 40 into an image visible by the photographer, and input the preset flash distance selected by the photographer to the central processing module 40 according to the operation of the photographer. . The human interface 50 can be a display and a button or touch mode liquid crystal display.
所述存儲模組60用於存儲來自該中央處理模組40之影像信號。所述存儲模組60可以係記憶體。 The storage module 60 is configured to store image signals from the central processing module 40. The storage module 60 can be a memory.
請參閱圖3,其為應用於上述影像擷取裝置1之閃光控制方法。該閃光控制方法包括以下步驟: Please refer to FIG. 3 , which is a flash control method applied to the image capturing device 1 described above. The flash control method includes the following steps:
S100:感測一場景,得到並預覽所述場景之影像。在該步驟中,所述成像模組10感測該場景並得到影像,然後在所述人機介面50上預覽該影像。 S100: Sensing a scene, obtaining and previewing an image of the scene. In this step, the imaging module 10 senses the scene and obtains an image, and then previews the image on the human interface 50.
S101:獲得該影像中之景物與該影像擷取裝置1之間之距離。在該步驟中,所述自動測距模組30先在所述場景中選擇至少兩個參照物,並測得該至少兩個參照物與所述影像擷取裝置1之間之距離,然後根據該至少兩個參照物在所述影像中之位置,確定所述場景與影像之投影關係,再根據該影像中其它景物與該至少兩個參照物之間之位置關係以及所述場景與影像之投影關係,計算得到該 影像中其它景物與該影像擷取裝置1之間之距離。 S101: Obtain a distance between the scene in the image and the image capturing device 1. In this step, the automatic ranging module 30 first selects at least two reference objects in the scene, and measures the distance between the at least two reference objects and the image capturing device 1, and then according to Positioning the at least two reference objects in the image to determine a projection relationship between the scene and the image, and then according to a positional relationship between the other scenes and the at least two reference objects in the image and the scene and the image Projection relationship, calculate this The distance between other scenes in the image and the image capturing device 1.
S102:提供至少兩個預設閃光距離供拍攝者選擇。在該步驟中,所述控制單元44在所述人機介面50上顯示至少兩個預設閃光距離。 S102: Provide at least two preset flash distances for the photographer to select. In this step, the control unit 44 displays at least two preset flash distances on the human machine interface 50.
S103:根據拍攝者選擇之預設閃光距離,顯示可被所述閃光模組20照亮之景物範圍。在該步驟中,根據所述影像中之景物與所述影像擷取裝置1之間之距離,以及拍攝者選擇之預設閃光距離所對應之所述閃光模組20之照亮範圍,找出位於該照亮範圍內之景物,並顯示可被該閃光模組20照亮之景物範圍。在該步驟中,所述控制單元44找出位於照亮範圍內之景物,並在所述人機介面50上顯示。 S103: Display a range of scenes that can be illuminated by the flash module 20 according to a preset flash distance selected by the photographer. In this step, according to the distance between the scene in the image and the image capturing device 1, and the illumination range of the flash module 20 corresponding to the preset flash distance selected by the photographer, A scene located within the illuminated range and displaying a range of scenes that can be illuminated by the flash module 20. In this step, the control unit 44 finds a scene located within the illumination range and displays it on the human machine interface 50.
S104:判斷是否採用該預設閃光距離進行閃光,若是,則進行步驟S105,若否,則進行步驟S102。在該步驟中,所述控制單元44根據拍攝者在所述人機介面50上之操作進行判斷。 S104: Determine whether the flash is performed by using the preset flash distance. If yes, proceed to step S105, and if no, proceed to step S102. In this step, the control unit 44 makes a determination based on the photographer's operation on the human machine interface 50.
S105:根據拍攝者選擇之預設閃光距離,控制所述閃光模組20進行閃光,並拍攝該場景。在該步驟中,由所述控制單元44控制所述閃光模組20。 S105: Control the flash module 20 to perform flash according to a preset flash distance selected by the photographer, and capture the scene. In this step, the flash module 20 is controlled by the control unit 44.
相較於先前技術,所述影像擷取裝置及其閃光控制方法可讓拍攝者自行選擇閃光模組之閃光距離,並顯示該閃光距離條件下能被所述閃光模組照亮之景物範圍,使拍攝者容易選擇合適之閃光距離,以獲得較好之曝光效果。 Compared with the prior art, the image capturing device and the flash control method thereof allow the photographer to select the flash distance of the flash module and display the range of the scene that can be illuminated by the flash module under the flash distance. It is easy for the photographer to select a suitable flash distance for better exposure.
綜上所述,本發明符合發明專利要件,爰依法提出專利申請。惟,以上所述者僅為本發明之較佳實施方式,本發明之範圍並不以上述實施方式為限,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內。 In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art in light of the spirit of the present invention are It should be covered by the following patent application.
1‧‧‧影像擷取裝置 1‧‧‧Image capture device
10‧‧‧成像模組 10‧‧‧ imaging module
20‧‧‧閃光模組 20‧‧‧Flash Module
30‧‧‧自動測距模組 30‧‧‧Automatic distance measuring module
40‧‧‧中央處理模組 40‧‧‧Central Processing Module
42‧‧‧影像處理單元 42‧‧‧Image Processing Unit
44‧‧‧控制單元 44‧‧‧Control unit
50‧‧‧人機介面 50‧‧‧Human Machine Interface
60‧‧‧存儲模組 60‧‧‧Memory Module
圖1為本發明之影像擷取裝置之功能模組圖。 1 is a functional block diagram of an image capture device of the present invention.
圖2為圖1中之影像擷取裝置之工作狀態示意圖。 2 is a schematic view showing the working state of the image capturing device of FIG. 1.
圖3為應用圖1中之影像擷取裝置之閃光控制方法之流程圖。 3 is a flow chart of a flash control method using the image capture device of FIG. 1.
1‧‧‧影像擷取裝置 1‧‧‧Image capture device
10‧‧‧成像模組 10‧‧‧ imaging module
20‧‧‧閃光模組 20‧‧‧Flash Module
30‧‧‧自動測距模組 30‧‧‧Automatic distance measuring module
40‧‧‧中央處理模組 40‧‧‧Central Processing Module
42‧‧‧影像處理單元 42‧‧‧Image Processing Unit
44‧‧‧控制單元 44‧‧‧Control unit
50‧‧‧人機介面 50‧‧‧Human Machine Interface
60‧‧‧存儲模組 60‧‧‧Memory Module
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TWI443436B (en) | 2011-07-29 | 2014-07-01 | Ability Entpr Co Ltd | Flash light module and image capturing system |
TWI452404B (en) * | 2013-01-04 | 2014-09-11 | Lustrous Electro Optic Co Ltd | Image-capturing system having a function of automatically adjusting a light-projecting angle |
CN106170059A (en) * | 2016-09-09 | 2016-11-30 | 珠海福普光电技术有限公司 | The control method of a kind of external flash lamp, control device and external flash lamp |
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TWI274952B (en) * | 2005-01-26 | 2007-03-01 | Asia Optical Co Inc | Method and system for automatically adjusting the flash intensity of camera |
US20070230933A1 (en) * | 2006-03-28 | 2007-10-04 | Fujifilm Corporation | Device and method for controlling flash |
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TWI274952B (en) * | 2005-01-26 | 2007-03-01 | Asia Optical Co Inc | Method and system for automatically adjusting the flash intensity of camera |
US20070230933A1 (en) * | 2006-03-28 | 2007-10-04 | Fujifilm Corporation | Device and method for controlling flash |
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