TWI668988B - Interphone system, interphone master unit, interphone slave unit and program - Google Patents
Interphone system, interphone master unit, interphone slave unit and program Download PDFInfo
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- TWI668988B TWI668988B TW106136068A TW106136068A TWI668988B TW I668988 B TWI668988 B TW I668988B TW 106136068 A TW106136068 A TW 106136068A TW 106136068 A TW106136068 A TW 106136068A TW I668988 B TWI668988 B TW I668988B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/02—Arrangements for interconnection not involving centralised switching involving a common line for all parties
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/66—Remote control of cameras or camera parts, e.g. by remote control devices
- H04N23/661—Transmitting camera control signals through networks, e.g. control via the Internet
- H04N23/662—Transmitting camera control signals through networks, e.g. control via the Internet by using master/slave camera arrangements for affecting the control of camera image capture, e.g. placing the camera in a desirable condition to capture a desired image
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Closed-Circuit Television Systems (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Studio Devices (AREA)
Abstract
本發明之課題在於減少圖像失真,且減少視覺上之違和感。本發明之對講機系統(10)具備進行修正由對講機子機(2)之攝像部(21)拍攝之圖像之失真的失真修正處理之圖像修正部(23)。圖像修正部(23)係於失真修正處理中,將圖像中之成為失真修正對象之區域分割為複數個區域,對複數個區域之各者進行互不相同之失真修正。An object of the present invention is to reduce image distortion and reduce visual sensation. The walkie-talkie system (10) of the present invention includes an image correcting unit (23) that performs distortion correction processing for correcting distortion of an image captured by the imaging unit (21) of the interphone unit (2). The image correcting unit (23) divides the region to be subjected to the distortion correction target into a plurality of regions in the distortion correction processing, and performs distortion correction for each of the plurality of regions.
Description
本發明係關於對講機系統、對講機母機、對講機子機、及程式,更詳細而言,係關於具備攝像功能之對講機系統、對講機母機、對講機子機、及程式。The present invention relates to a walkie-talkie system, a walkie-talkie machine, a walkie-talkie machine, and a program. More specifically, it relates to a walkie-talkie system having an image capture function, a walkie-talkie machine, a walkie-talkie machine, and a program.
先前,提供一種為了擴大攝像機之視野範圍而使用廣角透鏡之對講機系統(電視對講機)(例如參照專利文獻1)。於專利文獻1記載之對講機系統具備對講機子機(子器),與經由信號傳送系統而連接於對講機子機之對講機母機(母器)。對講機子機具有:攝像部(電視攝影機),其安裝有廣角透鏡;及麥克風,其對訪客之聲音進行收音。對講機母機具有:顯示部(監控電視),其顯示來自對講機子機之圖像;揚聲器,其輸出來自對講機子機之聲音;圖像修正部(圖像失真修正機構),其修正圖像失真。 於專利文獻1記載之對講機系統中,藉由圖像修正部修正因使用廣角透鏡而產生之圖像失真,且於顯示部映現出修正後之影像,藉此,可獲得失真較少之影像。 然而,於專利文獻1記載之對講機系統中,由於構成為對於來自對講機子機之所有圖像進行相同之失真修正,因此,有可能於顯示部映現出於視覺上產生違和感之影像。 [先前技術文獻] [專利文獻] [專利文獻1]日本專利特開平6-225312號公報In the past, a walkie-talkie system (television walkie-talkie) using a wide-angle lens for expanding the field of view of the camera has been provided (for example, refer to Patent Document 1). The walkie-talkie system described in Patent Document 1 includes a walkie-talkie handset (sub-device) and a walkie-talkie master (master) connected to the walkie-talkie handset via a signal transmission system. The intercom has a camera unit (television camera) mounted with a wide-angle lens, and a microphone that collects the sound of the visitor. The walkie-talkie master has a display unit (monitor television) that displays an image from the walkie-talkie handset, a speaker that outputs sound from the walkie-talkie handset, and an image correction unit (image distortion correction mechanism) that corrects image distortion. In the walkie-talkie system described in Patent Document 1, the image correcting unit corrects image distortion caused by the use of the wide-angle lens, and the corrected image is reflected on the display unit, whereby an image with less distortion can be obtained. However, in the walkie-talkie system described in Patent Document 1, since the same distortion correction is performed for all the images from the walkie-talkie handset, there is a possibility that the display unit displays an image that visually causes a sense of discomfort. [Prior Art Document] [Patent Document] [Patent Document 1] Japanese Patent Laid-Open No. Hei 6-225312
本發明係鑒於上述課題而完成者,其目的在於提供一種可減少圖像失真,且降低視覺上的違和感之對講機系統、對講機母機、對講機子機、及程式。 本發明之一態樣之對講機系統係構成為對講機母機及對講機子機可相互通信之對講機系統。上述對講機系統具備圖像修正部,其進行修正由上述對講機子機之攝像部拍攝之圖像之失真的失真修正處理。上述圖像修正部構成為於上述失真修正處理中,將上述圖像中之成為失真修正對象之區域分割為複數個區域,且對上述複數個區域之各者進行互不相同之失真修正。 本發明之一態樣之對講機母機係使用於上述之對講機系統。 本發明之一態樣之子機係使用於上述之對講機系統。 本發明之一態樣之程式係使電腦作為上述對講機系統中之上述圖像處理部而發揮功能。The present invention has been made in view of the above problems, and an object thereof is to provide a walkie-talkie system, a walkie-talkie machine, a walkie-talkie machine, and a program that can reduce image distortion and reduce visual discomfort. The walkie-talkie system of one aspect of the present invention is configured as a walkie-talkie system in which a walkie-talkie master and a walkie-talkie slave can communicate with each other. The walkie-talkie system includes an image correcting unit that performs distortion correction processing for correcting distortion of an image captured by an imaging unit of the walkie-talkie handset. The image correcting unit is configured to divide the region to be subjected to the distortion correction target into a plurality of regions in the distortion correction processing, and perform distortion correction different from each other for each of the plurality of regions. The walkie-talkie master of one aspect of the present invention is used in the walkie-talkie system described above. A sub-machine of one aspect of the present invention is used in the walkie-talkie system described above. A program according to an aspect of the present invention causes a computer to function as the image processing unit in the walkie-talkie system.
以下,茲說明本發明之一實施形態。下述之實施形態不過為本發明之各種實施形態之一。又,下述之實施形態只要能夠達成本發明之目的,則可根據設計等進行各種變更。 本實施形態之對講機系統10如圖1所示,具備對講機母機1與對講機子機2。於本實施形態中,對講機系統10以集合住宅用之對講機系統之情形為例進行說明。另,於以下之說明中,於不特別區分來訪者100A、100B之情形時,將來訪者100A、100B之各者記作「來訪者100」。 對講機母機1係設置於集合住宅之住戶內(室內)之室內母機。對講機子機2係設置於集合住宅之公共空間(大廳)之大廳對講機。對講機母機1與對講機子機2構成為可相互通信。藉此,於對講機系統10中,能夠在對講機母機1與對講機子機2之間進行通話。又,於對講機子機2設置有攝像部21,於對講機母機1設置有顯示部12。藉此,於對講機系統10中,可使由對講機子機2之攝像部21拍攝之來訪者等之圖像於對講機母機1之顯示部12上顯示。 對講機子機2如圖1所示,具有攝像部21、子機通信部22、圖像修正部23、子機控制部24、操作部25及記憶部26。 攝像部21包含:攝像元件211,其拍攝特定區域;透鏡212,其相對於攝像元件211可傾斜。攝像部21係用以拍攝來訪者等被攝體之攝像機。因此,為了於來訪者操作對講機子機2時至少將來訪者的臉映入圖像,故將攝像部21之拍攝區域(視野)設定為對講機子機2之前方。於本實施形態中,攝像部21雖假定為拍攝動態圖像之攝像機,但攝像部21亦可為拍攝靜態圖像之照相機(靜態相機)。又,於本實施形態中,攝像部21雖假定為拍攝彩色圖像之彩色相機,但攝像部21亦可為拍攝黑白圖像之單色相機。此處,於本實施形態中,集合住宅之公共空間為特定區域。當然,特定區域並未限定於集合住宅之公共空間,例如於對講機子機2設置於集合住宅之各住戶之外玄關之情形時,各住戶之玄關處即為特定區域。 攝像元件211例如為CCD(Charge Coupled Devices:電荷耦合元件)圖像感測器、或CMOS(Complementary Metal-Oxide Semiconductor:互補性金屬氧化膜半導體)圖像感測器等二維圖像感測器。攝像部21藉由透鏡212使來自被攝體之光於攝像元件211之攝像面(受光面)上成像,以攝像元件211將來自被攝體之光轉換成電性信號(圖像信號)。因此,以攝像部21拍攝之圖像自攝像部21作為圖像信號而輸出。此處,攝像部21構成為自攝像元件211之輸出信號產生YUV格式之數位之圖像信號,而輸出數位之圖像信號。透鏡212例如為具有180度以上之畫角之魚眼透鏡(超廣角透鏡),且構成為於與左右方向(垂直於圖2之紙面之方向)正交之平面內可相對於攝像元件211旋轉(可傾斜)。因此,包含攝像元件211與透鏡212之攝像部21之光軸P1(參照圖2)會根據透鏡212之傾斜角度α1(參照圖7)而變化。 子機通信部22係用以與對講機母機1通信之通信介面。子機通信部22經由例如包含雙絞線等2線式之傳送路徑4(於圖1中以1條線表示),與對講機母機1電性連接。子機通信部22包含發送部221。發送部221將由攝像部21拍攝到的圖像之圖像信號發送至對講機母機1。進而,子機通信部22係構成為可於與對講機母機1之間雙向通信,以能夠於對講機子機2與對講機母機1之間雙向傳送聲音信號及控制信號。 圖像修正部23係構成為對於自攝像部21輸出之圖像信號進行修正圖像失真之失真修正處理。對子機通信部22輸入自圖像修正部23輸出之圖像(圖像信號)。因此,發送部221係向對講機母機1發送經圖像修正部23修正之圖像信號,而非自攝像部21輸出之狀態之圖像信號。圖像修正部23例如藉由DSP(Digital Signal Processor:數位信號處理器)或FPGA(Field-Programmable Gate Array:場可程式化閘陣列)等實現。另,關於圖像修正部23之失真修正處理見後述。 操作部25受理來自來訪者用以呼叫之操作。對操作部進行特定之操作(例如按壓操作)時,對講機子機2會將用於呼叫住家內之居住者之控制信號(呼叫信號)自子機通信部22向對講機母機1發送。又,操作部25構成為可輸入透鏡212相對於攝像元件211之傾斜角度α1、及安裝有對講機子機2之安裝台3(參照圖2)之安裝面31之傾斜角度θ2。該等傾斜角度α1、θ2係於對講機系統10之施工時由施工者輸入。 記憶部26係可重寫資料之記憶體,較佳為非揮發性記憶體。記憶部26構成為記錄由攝像部21拍攝之圖像。又,於記憶部26中,預先記錄有對由攝像部21拍攝之圖像進行之複數個失真修正圖案。於本實施形態中,於記憶部26預先記錄有第1失真修正圖案、第2失真修正圖案、及第3失真修正圖案,作為複數個失真修正圖案。於第1失真修正圖案中,於圖像之左右方向(水平方向)進行失真修正。於第2失真修正圖案中,於圖像之左右方向及上下方向(鉛直方向)進行失真修正。於第3失真修正圖案中,以與第2失真修正圖案不同之修正強度於圖像之左右方向及上下方向進行失真修正。此處,所謂修正強度係指水平方向及鉛直方向中之至少一方向之延展程度。例如,於水平方向之修正強度較強之情形時,會沿水平方向大幅延展。 子機控制部24係控制對講機子機2之各構成要素。子機控制部24例如由以CPU(Central Processing Unit:中央處理單元)及記憶體為主構成之微電腦構成,且藉由CPU執行儲存於記憶體之程式,使微電腦作為子機控制部24而發揮功能。CPU所執行之程式於此處係預先記錄於微電腦之記憶體,但亦可記錄於記憶卡等非暫態記錄媒體而提供,抑或可通過電性通信線路而提供。 對講機子機2如圖2所示,進而具有殼體20。殼體20形成為厚度較薄之矩形箱狀,於殼體20之內部,收納有包含攝像部21及發送部221之對講機子機2之各構成要素。 對講機母機1如圖1所示,具有母機通信部11、顯示部12、母機控制部13、圖像處理部14、及操作部15。 母機通訊部11係用以與對講機子機2通信之通信介面。母機通信部11經由傳送路徑4與對講機子機2之子機通信部22電性連接。母機通信部11包含接收部111。接收部111接收自對講機子機2之發送部221發送之圖像信號。進而,母機通信部11構成為於與對講機子機2(子機通信部22)之間可雙向通信,以能夠在與對講機母機1之間雙向傳送聲音信號及控制信號。 顯示部12基於圖像信號顯示圖像。顯示部12例如為液晶顯示器。又,於對講機母機1具備觸控面板之情形時,觸控面板顯示器兼作顯示部12與操作部15。 圖像處理部14接收自接收部111輸出之圖像信號,進行圖像處理。對顯示部12輸入自圖像處理部14輸出之圖像(圖像信號)。因此,顯示部12係顯示基於經圖像處理部14施行圖像處理後之圖像信號的圖像,而非基於接收部111接收到之狀態之圖像信號的圖像。圖像處理部14藉由例如DSP或FPGA等實現。 操作部15受理住戶內之居住者之操作。在母機通信部11自對講機子機2接收到用以呼叫居住者之控制信號(呼叫信號)之狀態下,若對操作部15進行特定之操作(例如按壓操作)時,對講機母機1與對講機子機2之間成為可通話之狀態。 母機控制部13係控制對講機母機1之各構成要素。母機控制部13由例如以CPU及記憶體為主構成之微電腦構成,藉由CPU執行儲存於記憶體之程式,使微電腦作為母機控制部13而發揮功能。CPU所執行之程式於此處係預先記錄於微電腦之記憶體,但亦可記錄於記憶卡等非暫態記錄媒體而提供,抑或可通過電性通信線路而提供。 圖2係顯示本實施形態之對講機子機2之設置例之概略圖。於集合住宅之公共空間5中,如圖2所示,設置有形成為上下方向(鉛直方向)較長之長方體狀之安裝台3。安裝台3具有供安裝對講機子機2之安裝面31。安裝面31如圖2所示,相對於與地面平行之水平面傾斜,其傾斜角度為θ2。因此,於將對講機子機2安裝於安裝台3之安裝面31之狀態下,對講機子機2(殼體20)亦相對於上述水平面以傾斜角度θ2傾斜。 於對講機子機2安裝於安裝台3之狀態下,攝像元件211之中心軸P2與安裝面31之法線方向平行。又,於本實施形態中,以包含攝像元件211與透鏡212之攝像部21之光軸P1之方向成為水平方向之方式,於與左右方向(垂直於圖2之紙面之方向)正交之平面中使透鏡212相對於攝像元件211順時針旋轉。因此,於本實施形態中,攝像部21之光軸P1與攝像元件211之中心軸P2不一致。 又,於本實施形態中,由於透鏡212為魚眼透鏡,故攝像部21於與左右方向正交之平面中之視野角為θ1(參照圖2)。此處,由於以攝像部21之光軸P1之方向為水平方向之方式使透鏡212傾斜(旋轉),故以對講機子機2之殼體20之一部分含在攝像部21之攝像區域內之方式,設定攝像部21之視野角θ1。 圖3A及圖3B係於比較例1之對講機母機1之顯示部12中顯示之圖像121之概略圖。於本實施形態中,如上所述,攝像部21之透鏡212為魚眼透鏡。因此,於藉由攝像部21拍攝之圖像121中,如圖3A所示,產生中心部像膨脹般之失真,即桶形之畸變像差(distortion)。 來訪者100A如圖3A所示,由於位於圖像121之中央,故失真較少。另一方面,來訪者100B由於位於圖像121之左側,故向外(向左)彎曲。於來訪者100A之後方,存在具有2片門片200A、200B之自動門200。於2扇門片200A、200B之各者中,上側之邊界線201、201向外(向上)彎曲。又,一側(圖3A中之左側)之門片200A之左側之邊界線202及另一側之門片200B之右側之境界線202,亦向外(向左或向右)彎曲。進而,於圖3A所示之例中,於圖像121之下部映入對講機子機2之殼體20之一部分。 於圖像修正部23相對於圖像121僅於水平方向(圖像121之左右方向)進行失真修正時(參照圖3A之箭頭標記),如圖3B所示,圖像121之失真被修正。此處,水平方向之失真修正係指以減少圖像121內於鉛直方向(上下方向)延伸的線之失真之方式,於水平方向上延展之修正。於該情形時,位於圖像121之左側之來訪者100B之失真減少,且2扇門片200A、200B各者之左側或右側之邊界線202之失真減少。另,於該情形時,2扇門片200A、200B之上側之邊界線201之失真仍存在,且殼體20之映入亦維持不改變。 圖4A及圖4B係於比較例2之對講機母機1之顯示部12中顯示之圖像121之概略圖。另,圖4A與上述之圖3A同樣,此處對於圖4A省略說明。 於圖像修正部23相對於圖像121於水平方向(圖像121之左右方向)及鉛直方向(圖像121之上下方向)進行失真修正(2維方向失真修正)時(參照圖4A中之箭頭),如圖4B所示,圖像121之失真被修正。此處,2維方向失真修正係指以減少圖像121內於鉛直方向與水平方向延伸的線之失真之方式,於鉛直方向及水平方向上延展之修正。於該情形時,2扇門片200A、200B各者之上側之邊界線201及左側或右側之邊界線202之失真減少,且對講機子機2之殼體20之映入消失。但,於該情形時,對於位於圖像121之左側之來訪者100B,其水平方向之失真雖減少,但由於鉛直方向之失真修正導致於鉛直方向延展。其結果,位於來訪者100B與來訪者100B之後方之自動門200之遠近感變得誇張,而成為不自然之圖像。 如上所述,於對圖像121之全體僅於水平方向上進行失真修正,或於水平方向及鉛直方向進行失真修正(二維方向失真修正)之情形時,對講機子機2之殼體20之一部分會映入圖像121內,而導致成為不自然之圖像。即,於對圖像121之全體進行相同之失真修正之情形時,有可能無法兼顧圖像失真之減少與視覺上之違和感之減少。 因此,本實施形態之圖像修正部23如圖5A及圖5B所示,構成為將圖像121分割為複數個(於圖示例中為2個)區域(第1區域1211及第2區域1212),對複數個區域各者進行互不相同之失真修正。以下參照圖5A及圖5B,對本實施形態之圖像修正部23之失真修正處理具體地進行說明。 圖5A係與上述圖3A及圖4A同樣為藉由攝像部21拍攝之圖像121之概略圖。本實施形態之圖像修正部23如圖5A所示,由圖像121之上下方向之中心線L1將圖像121之區域於上下方向分割為2(2等分)。較中心線L1更上側(一側)之區域為第1區域1211,較中心線L1更下側(另一側)之區域為第2區域1212。於本實施形態中,中心線L1設定為與攝像部21之攝像元件211之中心軸P2(參照圖2)相交。 圖像修正部23如圖5A所示,自預先記錄於記憶部26之第1失真修正圖案、第2失真修正圖案及第3失真修正圖案之中,選擇第1失真修正圖案,對第1區域1211進行失真修正。即,圖像修正部23對第1區域1211進行修正水平方向(圖像121之左右方向)之失真之第1失真修正。藉此,於第1區域1211中,位於圖像121之左側之來訪者100B之失真減少,且2扇門片200A、200B各者之左側及右側之邊界線202之失真減少(參照圖5B)。而另一方面,2扇門片200A、200B上側之邊界線201則留有失真。 圖像修正部23對於第2區域1212選擇第2失真修正圖案。即,圖像修正部23對於第2區域1212,進行修正水平方向及垂直方向(圖像121之上下方向)之失真之第2失真修正。藉此,於第2區域1212中,來訪者100B之失真減少,且2片門片200A、200B各者之左側或右側之邊界線202之失真減少。進而,對於第2區域1212,藉由亦修正垂直方向之失真,殼體20之映入亦消失(參照圖5B)。 如上所述,藉由將圖像121之區域分割為第1區域1211及第2區域1212,對第1區域1211進行第1失真修正,對第2區域1212進行第2失真修正,可兼顧圖像失真之減少與視覺上之違和感之減少。 且說於上述實施形態中,圖像修正部23雖將圖像121之區域分割為2個區域(第1區域1211及第2區域1212),但圖像121之分割數不限於2個。本實施形態之對講機子機2如上所述,由於相對於與地面平行之水平面傾斜而安裝,故圖像121中之來訪者100A、100B及自動門200之位置根據安裝面31之傾斜角度θ2而變化。因此,圖像修正部23較佳構成為根據安裝面31之傾斜角θ2變更圖像121之分割數。另,安裝面31之傾斜角度θ2可經由上述操作部25輸入。以下,參照圖6A~圖6C對本實施形態之變化例1具體地進行說明。 圖像修正部23如圖6A所示,根據安裝面31之傾斜角度θ2而分割為複數個(於圖示例中為4個)區域(第1區域1211、第2區域1212、第3區域1213及第4區域1214),對複數個區域之各者進行互不相同之失真修正。另,圖6A中之PL1、PL2、PL3為分割線。 例如,於安裝面31之傾斜角度θ2為30度之情形時,圖像修正部23如圖6B所示,藉由2條分割線PL1、PL2將圖像121分割為第1區域1211、第2區域1212及第3區域1213。於該情形時,圖像修正部對假定含有來訪者100之臉之第1區域1211,進行修正水平方向(圖像121之左右方向)之失真之第1失真修正。又,圖像修正部23對第1區域1211與第3區域1213之間之第2區域1212,進行修正水平方向及鉛直方向(圖像121之上下方向)之失真之第2失真修正(二維方向失真修正)。進而,圖像修正部23對產生對講機子機2之殼體20映入之第3區域1213,進行修正水平方向及鉛直方向之失真之第3失真修正。此時,圖像修正部23於第3失真修正中,為了避免殼體20映入第3區域1213,較佳為將鉛直方向之修正強度增強為高於第2失真修正。 又,於安裝面31之傾斜角度θ2為45度之情形時,圖像修正部23如圖6C所示,藉由1條分割線PL1將圖像121分割為第1區域1211及第2區域1212。於該情形時,圖像修正部23對假定含有來訪者100之臉之第1區域1211,進行修正水平方向之失真之第1失真修正。又,圖像修正部23對產生對講機子機2之殼體20映入之第2區域1212,進行修正水平方向及鉛直方向之失真之第2失真修正。此處,由於隨著安裝面31之傾斜角度變大,殼體20之映入量變少,故圖像修正部23較佳為將鉛直方向之修正強度減弱為低於安裝面31之傾斜角度θ2為30度之情形。 如上所述,藉由根據安裝面31之傾斜角度θ2而變更圖像121之分割數(複數個區域之分割數),可進行與安裝面31之傾斜角度θ2對應之失真修正。 按於上述之變化例1中係根據安裝對講機子機2之安裝面31之傾斜角度θ2而變更了圖像121之分割數,但亦可例如根據透鏡212相對於攝像元件211之傾斜角度α1而變更圖像121之分割數。以下,參照圖6B、圖6C及圖7,對本實施形態之變化例2具體地進行說明。 圖7係顯示本實施形態之變化例2之對講機子機2之設置例之概略圖。對講機子機2如上所述,構成為透鏡212可相對於攝像元件211傾斜。於攝像元件211之中心軸P2(參照圖2)與透鏡212之中心軸一致之情形時,攝像部21之光軸P1成為P11。於將透鏡212相對於攝像元件211之傾斜角度α1設為α11之情形時,攝像部21之光軸P1成為P12。又,於將透鏡212相對於攝像元件211之傾斜角度α1設為α12(α12>α11)之情形時,攝像部21之光軸P1成為P13。 例如,於透鏡212之傾斜角度α1為α11之情形時,圖像修正部23如圖6C所示,由1條分割線PL1將圖像121分割為第1區域1211及第2區域1212。於該情形時,圖像修正部23對假定含有來訪者100之臉之第1區域1211,進行修正水平方向之失真之第1失真修正。又,圖像修正部23對產生對講機子機2之殼體20映入之第2區域1212,進行修正水平方向及鉛直方向之失真之第2失真修正。 又,於攝像元件212之傾斜角度α1為α12(α12>α11)之情形時,圖像修正部23如圖6B所示,由2條分割線PL1、PL2分割為第1區域1211、第2區域1212及第3區域1213。於該情形時,圖像修正部23對假定含有來訪者100之臉之第1區域1211,進行僅修正水平方向之失真之第1失真修正。又,圖像修正部23對第1區域1211與第3區域1213之間之第2區域1212,進行修正水平方向及鉛直方向之失真之第2失真修正(二維方向失真修正)。進而,圖像修正部23對產生對講機子機2之殼體20映入之第3區域1213,進行修正水平方向及鉛直方向之失真之第3失真修正。此時,圖像修正部23於第3失真修正中,為了避免殼體20映入第3區域1213,較佳為將鉛直方向之修正強度增強為高於第2失真修正。 如上所述,藉由根據透鏡212相對於攝像元件211之傾斜角度α1而變更圖像121之分割數(複數個區域之分割數),可進行與透鏡212之傾斜角度α1對應之失真修正。 而如上述之實施形態及變化例1、2所示,於圖像修正部23以DSP或FPGA為主構成之情形時,藉由程式,可實現圖像修正部23之功能。即,本實施形態之程式係用以使電腦作為對講機系統10中之圖像修正部23發揮功能之程式。根據該程式,藉由使電腦作為圖像修正部23發揮功能,可減少圖像121之圖像失真,且減少視覺上之違和感。 以下,對本實施形態之其他變化例進行說明。 於上述之實施形態及變化例1、2中,以對講機子機2為大廳對講機之情形為例進行了說明,但對講機子機2亦可為設置於每戶集合住宅之住戶之門禁電話子機等。又,對講機母機1並非限定於設置於集合住宅之住戶內,例如亦可為設置於集合住宅之管理員室等之管理室母機。 又,於上述之實施形態及變化例1、2中,以將對講機系統10應用於集合住宅之情形為例進行了說明,但對講機系統10之應用對象並未限定於集合住宅,亦可為獨棟住宅。於該情形時,對講機母機1為設置於住宅內之室內母機,對講機子機2為設置於住宅之外玄關之門禁電話子機。又,對講機系統10之應用對象並未限定於住宅,亦可為大廈或工廠等非住宅。 又,於上述實施形態及變化例1、2中,以圖像121之全體作為失真修正之對象,但失真修正之對象亦可為圖像121之一部分。於該情形時,圖像修正部23只要構成為將作為失真修正之對象之圖像121之一部分分割為複數個區域,對複數個區域之各者進行互不相同之失真修正即可。 進而,於上述之實施形態及變化例1、2中,於將圖像121分割為2時係由中心線L1經2等分,但亦可由與中心線L1不同之分割線予以2分割。即,較上述分割線更上側之區域即第1區域,與較上述分割線更下側之區域即第2區域亦可為不同之大小。又,於將圖像121分割為3個以上之情形亦同,可將各區域均等地分割,亦可不均等地分割。 又,於上述實施形態及變化例1、2中,於圖像121中,較中心線L1更上側之區域為第1區域1211,下側之區域為第2區域1212,但第1區域1211與第2區域1212亦可為相反。即,亦可為,於圖像121中較中心線L1更上側之區域為第2區域1212,下側之區域為第1區域1211。根據該構成,例如於將攝像部21之光軸P1設定為朝上且殼體20之上側之一部分映入圖像121之情形時,可避免殼體20映入圖像121。 進而,於上述之變化例1、2中, 構成為於施工時由施工者輸入安裝面31之傾斜角度θ2及透鏡212之傾斜角度α1。相對於此,亦可構成為例如藉由使透鏡212自動地傾斜之功能而自動地輸入透鏡212之傾斜角度α1。又,亦可構成為於將對講機子機2安裝於安裝台3時自動地計測安裝面31之傾斜角度θ2。 又,於上述之實施形態及變化例1、2中,以具備對講機母機1及對講機子機2之對講機系統10為例進行了說明,但亦可例如對防盜攝像機或車載攝像機等應用上述構成。 進而,於上述實施形態及變化例1、2中,以對講機子機2具有圖像修正部23之情形為例進行說明,但對講機母機1亦可具有圖像修正部。 又,於上述之實施形態及變化例1、2中,以對講機母機1具有顯示部12之情形為例進行了說明。相對於此,可為設置於住戶內之室內子機與對講機母機1皆具有顯示部,亦可為智慧型手機或平板終端等泛用之行動資訊終端(PDA:Personal Digital Assistant,個人數位助理)具有顯示部。 又,於上述之實施形態及變化例1、2中,構成為以透鏡212可相對於攝像元件211傾斜之情形為例進行了說明,但亦可構成為攝像元件211及透鏡212可一體地旋轉。於該情形時,圖像修正部23較佳構成為於失真修正處理中,根據攝像元件211及透鏡212之傾斜角度而變更複數個區域之分割數。又,圖像修正部23亦可構成為於失真修正處理中,根據攝像元件211及透鏡212之傾斜角度,自第1失真修正、第2失真修正及第3失真修正之中選擇要對複數個區域之各者進行之失真修正而進行。第1失真修正為修正圖像左右方向之失真之修正。第2失真修正為修正圖像左右方向之上下方向之失真之修正。第3失真修正為以與第2失真修正不同之修正強度修正圖像之左右方向及上下方向之失真。 自以上所述之實施形態可明瞭,第1態樣之對講機系統(10)係構成為對講機母機(1)及對講機子機(2)可相互通信之對講機系統。對講機系統(10)具備進行修正由對講機子機(2)之攝像部(21)拍攝之圖像失真之失真修正處理之圖像修正部(23)。圖像修正部(23)係構成為於失真修正處理中,將圖像中之成為失真修正對象之區域分割為複數個區域,對複數個區域之各者進行互不相同之失真修正。 根據第1態樣,圖像修正部(23)由於將成為失真修正之對象之區域分割為複數個區域,對複數個區域之各者進行互不相同之失真修正,故與對圖像全體進行相同之失真修正之情形相比,可減少圖像失真,且降低視覺上之違和感。 第2態樣之對講機系統(10)係如第1態樣,其中具備顯示藉由圖像修正部(23)而獲得之修正後的圖像、或基於修正後之圖像之圖像信號的圖像之顯示部(12)。 根據第2態樣,可將由圖像修正部(23)修正後之圖像顯示於顯示部(12)。 第3態樣之對講機系統(10)係如第1或第2態樣,其中,圖像修正部(23)係構成為分割為第1區域(1211)與第2區域(1212),作為複數個區域。第1區域(1211)係包含將圖像(121)於上下方向上分割為2之其中一區域。第2區域(1212)係包含將圖像(121)於上下方向上分割為2之另一區域。 根據第3態樣,藉由對第1區域(1211)及第2區域(1212)進行互不相同之失真修正,可減少圖像之分割數,並減少圖像失真且減少視覺上之違和感。惟該構成並非對講機系統(10)之必要之構成,作為複數個區域,例如亦可分割為3個以上之區域。 於第4態樣之對講機系統(10)係如第3態樣,其中,第1區域(1211)與第2區域(1212)係指由圖像(121)之上下方向之中心線(L1)2等分之2個區域。 根據第4態樣,由於藉由中心線(L1)2等分為2個區域,故於拍攝到人物(來訪者)之情形時,可於其中一區域包含來訪者之臉。且,藉由對於包含臉之一區域僅於水平方向(圖像(121)之左右方向)進行失真修正,可減少來訪者之臉不自然地變形。惟是否採用該構成為任意。 第5態樣之對講機系統(10)係如第3或4之態樣,其中,圖像修正部(23)構成為於失真修正處理中,於第1區域(1211)進行第1失真修正,於第2區域(1212)進行第2失真修正。於第1失真修正中,修正圖像(121)之左右方向之失真。於第2失真修正中,修正圖像(121)之左右方向及上下方向之失真。 根據第5態樣,與對圖像全體進行第1失真修正之情形相比可減少殼體(20)映入,且與對圖像全體進行第2失真修正之情形相比可減少人物(來訪者)之臉不自然地變形。即,根據第4態樣,與對圖像全體進行相同之失真修正之情形相比,可減少圖像失真,且減少視覺上之違和感。惟是否採用該構成為任意。 第6態樣之對講機系統(10)係如第1或第2態樣,其中,攝像部(21)進而包含可相對於攝像元件(211)傾斜之透鏡(212)。圖像修正部(23)構成為於失真修正處理中,根據透鏡(212)之傾斜角度(α1),變更複數個區域之分割數。 根據第6態樣,可進行與透鏡(212)之傾斜角度(α1)對應之失真修正處理。惟該構成並非對講機系統(10)之必要之構成,例如亦可無論透鏡(212)之傾斜角度(α1)為何,複數個區域之分割數均為一定。 第7態樣之對講機系統(10)係如第6態樣,其中,圖像修正部(23)於失真修正處理中,根據透鏡(212)之傾斜角度(α1),自第1失真修正、第2失真修正、及第3失真修正之中,選擇要對複數個區域之各者進行之失真修正。於第1失真修正中,修正圖像(121)之左右方向之失真。於第2失真修正中,修正圖像(121)之左右方向及上下方向之失真。於第3失真修正中,以與第2失真修正不同之修正強度修正圖像(121)之左右方向及上下方向之失真。 根據第7態樣,可根據透鏡(212)之傾斜角度(α1),自第1失真修正、第2失真修正、及第3失真修正之中選擇要對複數個區域之各者進行之失真修正。惟是否採用該構成為任意。 第8態樣之對講機系統(10)係如第1、2、6或7之態樣,其中,對講機子機(2)進而具有收納攝像部(21)及發送部(221)之殼體(20)。殼體(20)係以攝像元件(211)之中心軸(P2)與安裝面(31)之法線方向平行之方式,安裝於安裝面(31)為傾斜之安裝台(3)之安裝面(31)。圖像修正部(23)構成為於失真修正處理中,根據安裝面(31)之傾斜角度(θ2),變更複數個區域之分割數。 根據第8態樣,可進行與安裝面(31)之傾斜角度(θ2)相應之失真修正處理。惟該構成並非對講機系統(10)之必要之構成,亦可例如無論安裝面(31)之傾斜角度(θ2)為何,複數個區域之分割數均為一定。 第9態樣之對講機系統(10)係如第8態樣,其中,圖像修正部(23)係於失真修正處理中,根據安裝面(31)之傾斜角度(θ2),自第1失真修正、第2失真修正、及第3失真修正之中選擇要對複數個區域之各者進行之失真修正。於第1失真修正中,修正圖像(121)之左右方向之失真。於第2失真修正中,修正圖像(121)之左右方向及上下方向之失真。於第3失真修正中,以與第2失真修正不同之修正強度修正圖像(121)之左右方向及上下方向之失真。 根據第9態樣,可根據安裝面(31)之傾斜角度(θ2),自第1失真修正、第2失真修正、及第3失真修正之中選擇要對複數個區域之各者進行之失真修正。惟是否採用該構成為任意。 第10態樣之對講機母機(1)係使用於第1至9中任一者之態樣之對講機系統(10)。 根據第10態樣,藉由使用對講機母機(1),可提供一種可減少圖像失真且減少視覺上之違和感之對講機系統(10)。 第(11)態樣之對講機子機(2)係使用於第1至9中任一態樣之對講機系統(10)。 根據第11態樣,藉由使用對講機子機(2),可提供一種可減少圖像失真且減少視覺上之違和感之對講機系統(10)。 第12態樣之程式係使電腦作為第1至9中任一態樣之對講機系統(10)中之圖像修正部(23)而發揮功能。 根據第12態樣,藉由使電腦作為圖像修正部(23)而發揮功能,可減少圖像失真,且減少視覺上之違和感。the following, An embodiment of the present invention will be described. The following embodiments are merely one of the various embodiments of the present invention. also, The following embodiments are intended to achieve the object of the present invention. Various changes can be made according to the design and the like. The walkie-talkie system 10 of this embodiment is shown in FIG. The walkie-talkie machine 1 and the walkie-talkie machine 2 are provided. In this embodiment, The walkie-talkie system 10 will be described by taking an example of a walkie-talkie system for a home. another, In the following description, Not specifically distinguishing visitors 100A, In the case of 100B, Future visitors 100A, Each of 100B is referred to as "Visitor 100." The walkie-talkie master 1 is installed in the indoor parent machine of the household (indoor) of the collective house. The walkie-talkie machine 2 is installed in the hall intercom of the public space (hall) of the collective house. The walkie-talkie master 1 and the walkie-talkie 2 are configured to communicate with each other. With this, In the walkie-talkie system 10, A call can be made between the walkie-talkie master 1 and the walkie-talkie handset 2. also, The interphone 2 is provided with an imaging unit 21, A display unit 12 is provided in the intercom base unit 1. With this, In the walkie-talkie system 10, An image of a visitor or the like photographed by the imaging unit 21 of the interphone unit 2 can be displayed on the display unit 12 of the intercom unit 1 . Interphone 2 is shown in Figure 1. Having an imaging unit 21, Slave communication unit 22, Image correction unit 23, The slave control unit 24, The operation unit 25 and the storage unit 26. The imaging unit 21 includes: Imaging element 211, Shooting a specific area; Lens 212, It is tiltable with respect to the imaging element 211. The imaging unit 21 is a camera for capturing a subject such as a visitor. therefore, In order to allow the visitor to operate the walkie-talkie handset 2, at least the face of the visitor is reflected in the image, Therefore, the imaging area (field of view) of the imaging unit 21 is set to be the front of the intercom 2 machine. In this embodiment, The imaging unit 21 is assumed to be a camera that captures a moving image. However, the imaging unit 21 may be a camera (still camera) that captures still images. also, In this embodiment, The imaging unit 21 is assumed to be a color camera that captures a color image. However, the imaging unit 21 may also be a monochrome camera that captures black and white images. Here, In this embodiment, The public space of the collective residence is a specific area. of course, The specific area is not limited to the public space of the collective residence. For example, when the intercom 2 is installed outside the occupants of the collective residence, The porch of each household is a specific area. The imaging element 211 is, for example, a CCD (Charge Coupled Devices: Charge coupled device) image sensor, Or CMOS (Complementary Metal-Oxide Semiconductor: A complementary metal oxide film semiconductor) two-dimensional image sensor such as an image sensor. The imaging unit 21 images the light from the subject on the imaging surface (light receiving surface) of the imaging element 211 by the lens 212. The light from the subject is converted into an electrical signal (image signal) by the imaging element 211. therefore, The image captured by the imaging unit 21 is output from the imaging unit 21 as an image signal. Here, The imaging unit 21 is configured to generate an image signal of a digital position in the YUV format from an output signal of the imaging element 211. And output the digital image signal. The lens 212 is, for example, a fisheye lens (super wide-angle lens) having an angle of drawing of 180 degrees or more. Further, it is configured to be rotatable (tiltable) with respect to the image pickup element 211 in a plane orthogonal to the left-right direction (the direction perpendicular to the paper surface of FIG. 2). therefore, The optical axis P1 (see FIG. 2) of the imaging unit 21 including the imaging element 211 and the lens 212 changes in accordance with the tilt angle α1 (see FIG. 7) of the lens 212. The slave communication unit 22 is a communication interface for communicating with the walkie-talkie master 1. The slave communication unit 22 includes, for example, a 2-line transmission path 4 including a twisted pair (indicated by one line in FIG. 1). It is electrically connected to the radio 1 of the intercom. The slave communication unit 22 includes a transmitting unit 221. The transmitting unit 221 transmits an image signal of an image captured by the imaging unit 21 to the intercom base unit 1. and then, The slave communication unit 22 is configured to be capable of two-way communication with the walkie-talkie master 1 . The audio signal and the control signal can be transmitted bidirectionally between the walkie-talkie handset 2 and the walkie-talkie master 1. The image correcting unit 23 is configured to perform distortion correction processing for correcting image distortion with respect to the image signal output from the imaging unit 21. The image (image signal) output from the image correcting unit 23 is input to the slave communication unit 22. therefore, The transmitting unit 221 transmits an image signal corrected by the image correcting unit 23 to the walkie-talkie machine 1 . Rather than the image signal of the state output from the imaging unit 21. The image correcting unit 23 is, for example, a DSP (Digital Signal Processor: Digital Signal Processor) or FPGA (Field-Programmable Gate Array: Field programmable gate arrays, etc. are implemented. another, The distortion correction processing by the image correcting unit 23 will be described later. The operation unit 25 accepts an operation from a visitor for calling. When a specific operation (for example, a pressing operation) is performed on the operation unit, The walkie-talkie machine 2 transmits a control signal (call signal) for calling the occupant in the home from the slave communication unit 22 to the walkie-talkie master 1. also, The operation unit 25 is configured to input an inclination angle α1 of the lens 212 with respect to the imaging element 211. And the inclination angle θ2 of the mounting surface 31 of the mounting table 3 (refer to FIG. 2) of the interphone 2 is mounted. The inclination angle α1 Θ2 is input by the constructor during construction of the walkie-talkie system 10. The memory unit 26 is a memory for rewritable data. Preferred is a non-volatile memory. The memory unit 26 is configured to record an image captured by the imaging unit 21. also, In the memory unit 26, A plurality of distortion correction patterns for the image captured by the imaging unit 21 are recorded in advance. In this embodiment, The first distortion correction pattern is recorded in advance in the memory unit 26, Second distortion correction pattern, And a third distortion correction pattern, As a plurality of distortion correction patterns. In the first distortion correction pattern, Distortion correction is performed in the left and right direction (horizontal direction) of the image. In the second distortion correction pattern, Distortion correction is performed in the left and right direction and the vertical direction (vertical direction) of the image. In the third distortion correction pattern, The distortion correction is performed in the left-right direction and the vertical direction of the image with a correction intensity different from the second distortion correction pattern. Here, The correction strength refers to the degree of extension of at least one of the horizontal direction and the vertical direction. E.g, When the correction intensity in the horizontal direction is strong, Will extend significantly in the horizontal direction. The slave control unit 24 controls each component of the walkie-talkie handset 2. The slave control unit 24 is, for example, a CPU (Central Processing Unit: The central processing unit) and the memory are mainly composed of a microcomputer. And by executing the program stored in the memory by the CPU, The microcomputer functions as the slave control unit 24. The program executed by the CPU is pre-recorded here in the memory of the microcomputer. However, it can also be recorded on a non-transitory recording medium such as a memory card. Or it can be provided through an electrical communication line. The walkie-talkie handset 2 is shown in Figure 2. Furthermore, it has a housing 20. The casing 20 is formed in a rectangular box shape having a thin thickness. Inside the housing 20, Each component of the interphone unit 2 including the imaging unit 21 and the transmission unit 221 is housed. The walkie-talkie machine 1 is shown in Figure 1. With a parent machine communication unit 11, Display unit 12, The parent machine control unit 13, Image processing unit 14, And the operation unit 15. The parent machine communication unit 11 is a communication interface for communicating with the walkie-talkie handset 2. The base unit communication unit 11 is electrically connected to the child communication unit 22 of the walkie-talkie unit 2 via the transmission path 4. The parent machine communication unit 11 includes a receiving unit 111. The receiving unit 111 receives an image signal transmitted from the transmitting unit 221 of the interphone unit 2. and then, The parent machine communication unit 11 is configured to be capable of bidirectional communication with the walkie-talkie handset 2 (slave communication unit 22). The sound signal and the control signal can be transmitted bidirectionally with the walkie-talkie master 1. The display unit 12 displays an image based on the image signal. The display unit 12 is, for example, a liquid crystal display. also, When the walkie-talkie machine 1 has a touch panel, The touch panel display also serves as the display unit 12 and the operation unit 15. The image processing unit 14 receives the image signal output from the receiving unit 111, Perform image processing. An image (image signal) output from the image processing unit 14 is input to the display unit 12. therefore, The display unit 12 displays an image based on an image signal subjected to image processing by the image processing unit 14, Rather than an image based on the image signal of the state received by the receiving unit 111. The image processing unit 14 is realized by, for example, a DSP, an FPGA, or the like. The operation unit 15 accepts the operation of the occupant in the household. In a state where the base unit communication unit 11 receives a control signal (call signal) for calling the occupant from the walkie-talkie handset 2, When a specific operation (for example, a pressing operation) is performed on the operation unit 15, The walkie-talkie master 1 and the walkie-talkie 2 become talkable. The parent machine control unit 13 controls each component of the walkie-talkie machine 1. The parent machine control unit 13 is constituted by, for example, a microcomputer mainly composed of a CPU and a memory. By executing the program stored in the memory by the CPU, The microcomputer functions as the parent machine control unit 13. The program executed by the CPU is pre-recorded here in the memory of the microcomputer. However, it can also be recorded on a non-transitory recording medium such as a memory card. Or it can be provided through an electrical communication line. Fig. 2 is a schematic view showing an example of installation of the interphone unit 2 of the embodiment. In the public space 5 of the collection house, as shown in picture 2, A mounting table 3 having a rectangular parallelepiped shape formed in a vertical direction (vertical direction) is provided. The mounting table 3 has a mounting surface 31 for mounting the interphone unit 2. The mounting surface 31 is as shown in FIG. 2 Tilting relative to the horizontal plane parallel to the ground, Its inclination angle is θ2. therefore, When the interphone 2 is mounted on the mounting surface 31 of the mounting table 3, The interphone 2 (housing 20) is also inclined at an inclination angle θ2 with respect to the above horizontal plane. When the interphone 2 is mounted on the mounting table 3, The central axis P2 of the imaging element 211 is parallel to the normal direction of the mounting surface 31. also, In this embodiment, The direction including the imaging element 211 and the optical axis P1 of the imaging unit 21 of the lens 212 is horizontal. The lens 212 is rotated clockwise with respect to the image pickup element 211 in a plane orthogonal to the left-right direction (the direction perpendicular to the paper surface of FIG. 2). therefore, In this embodiment, The optical axis P1 of the imaging unit 21 does not coincide with the central axis P2 of the imaging element 211. also, In this embodiment, Since the lens 212 is a fisheye lens, Therefore, the viewing angle of the imaging unit 21 in the plane orthogonal to the left-right direction is θ1 (see FIG. 2). Here, Since the lens 212 is tilted (rotated) such that the direction of the optical axis P1 of the imaging unit 21 is horizontal, Therefore, a part of the casing 20 of the intercom 2 is included in the imaging area of the imaging unit 21, The viewing angle θ1 of the imaging unit 21 is set. 3A and 3B are schematic views of an image 121 displayed on the display unit 12 of the intercom master 1 of Comparative Example 1. In this embodiment, As mentioned above, The lens 212 of the imaging unit 21 is a fisheye lens. therefore, In the image 121 captured by the imaging unit 21, As shown in Figure 3A, Produce a distortion like the center of the center, That is, the distortion of the barrel shape. Visitor 100A is shown in Figure 3A. Since it is located in the center of the image 121, Therefore, the distortion is less. on the other hand, The visitor 100B is located on the left side of the image 121, Therefore, it bends outward (to the left). After the visitor 100A, There are two pieces of door 200A, 200B automatic door 200. In 2 doors 200A, Among the 200B, The boundary line 201 on the upper side, 201 is bent outward (upward). also, The boundary line 202 on the left side of the door piece 200A on one side (the left side in FIG. 3A) and the boundary line 202 on the right side of the door piece 200B on the other side, Also bend outward (left or right). and then, In the example shown in FIG. 3A, A portion of the housing 20 of the walkie-talkie handset 2 is reflected in the lower portion of the image 121. When the image correcting unit 23 performs distortion correction in the horizontal direction (the horizontal direction of the image 121) with respect to the image 121 (refer to the arrow mark of FIG. 3A), As shown in Figure 3B, The distortion of the image 121 is corrected. Here, The distortion correction in the horizontal direction refers to a method of reducing distortion of a line extending in the vertical direction (up and down direction) in the image 121, Correction in the horizontal direction. In this case, The distortion of the visitor 100B located on the left side of the image 121 is reduced, And 2 door pieces 200A, The distortion of the boundary line 202 on the left or right side of each of the 200B is reduced. another, In this case, 2 door panels 200A, The distortion of the boundary line 201 on the upper side of 200B still exists. And the reflection of the housing 20 is also maintained unchanged. 4A and 4B are schematic views of an image 121 displayed on the display unit 12 of the walkie-talkie machine 1 of Comparative Example 2. another, 4A is the same as FIG. 3A described above. Description is omitted here for FIG. 4A. When the image correcting unit 23 performs distortion correction (two-dimensional directional distortion correction) in the horizontal direction (the horizontal direction of the image 121) and the vertical direction (the upper and lower directions of the image 121) with respect to the image 121 (refer to FIG. 4A) arrow), As shown in Figure 4B, The distortion of the image 121 is corrected. Here, The two-dimensional directional distortion correction refers to a method of reducing distortion of a line extending in the vertical direction and the horizontal direction in the image 121, Correction in the vertical and horizontal directions. In this case, 2 door panels 200A, The distortion of the boundary line 201 on the upper side of each of 200B and the boundary line 202 on the left or right side is reduced, And the reflection of the casing 20 of the intercom 2 is disappeared. but, In this case, For the visitor 100B located to the left of the image 121, Although the distortion in the horizontal direction is reduced, However, due to the distortion correction in the vertical direction, the vertical direction is extended. the result, The proximity of the automatic door 200 after the visitor 100B and the visitor 100B becomes exaggerated. And become an unnatural image. As mentioned above, Performing distortion correction only on the horizontal direction of the entire image 121, Or when the distortion correction (two-dimensional direction distortion correction) is performed in the horizontal direction and the vertical direction, A portion of the housing 20 of the intercom 2 will be reflected in the image 121. It leads to an unnatural image. which is, When the same distortion correction is performed on the entire image 121, It may not be possible to balance the reduction in image distortion with the reduction in visual dissonance. therefore, The image correcting unit 23 of the present embodiment is as shown in FIGS. 5A and 5B. The image 121 is divided into a plurality of (two in the illustrated example) regions (the first region 1211 and the second region 1212). Distortion corrections are made for each of a plurality of regions. 5A and 5B, The distortion correction processing by the image correcting unit 23 of the present embodiment will be specifically described. FIG. 5A is a schematic view of an image 121 captured by the imaging unit 21, similarly to FIG. 3A and FIG. 4A described above. The image correcting unit 23 of the present embodiment is as shown in FIG. 5A. The area of the image 121 is divided into two (2 divisions) in the vertical direction by the center line L1 of the upper and lower directions of the image 121. The area on the upper side (one side) of the center line L1 is the first area 1211, The area on the lower side (the other side) of the center line L1 is the second area 1212. In this embodiment, The center line L1 is set to intersect with the central axis P2 (see FIG. 2) of the imaging element 211 of the imaging unit 21. The image correcting unit 23 is as shown in FIG. 5A. The first distortion correction pattern recorded in the memory unit 26 in advance, Among the second distortion correction pattern and the third distortion correction pattern, Select the first distortion correction pattern, The first region 1211 is subjected to distortion correction. which is, The image correcting unit 23 corrects the first distortion correction in the horizontal direction (the horizontal direction of the image 121) in the first region 1211. With this, In the first area 1211, The distortion of the visitor 100B located on the left side of the image 121 is reduced, And 2 door pieces 200A, The distortion of the boundary line 202 on the left and right sides of each of 200B is reduced (refer to FIG. 5B). On the other hand, 2 door panels 200A, The boundary line 201 on the upper side of 200B is left with distortion. The image correcting unit 23 selects the second distortion correction pattern for the second region 1212. which is, The image correcting unit 23 for the second region 1212, The second distortion correction for correcting the distortion in the horizontal direction and the vertical direction (the upper and lower directions of the image 121) is performed. With this, In the second area 1212, The distortion of the visitor 100B is reduced, And 2 pieces of door piece 200A, The distortion of the boundary line 202 on the left or right side of each of the 200B is reduced. and then, For the second area 1212, By also correcting the distortion in the vertical direction, The reflection of the casing 20 also disappears (refer to Fig. 5B). As mentioned above, By dividing the area of the image 121 into the first area 1211 and the second area 1212, Performing the first distortion correction on the first region 1211, Performing the second distortion correction on the second region 1212, Both the reduction of image distortion and the reduction of visual distraction can be considered. And in the above embodiment, The image correcting unit 23 divides the region of the image 121 into two regions (the first region 1211 and the second region 1212). However, the number of divisions of the image 121 is not limited to two. The intercom machine 2 of the present embodiment is as described above. Installed due to tilting relative to the horizontal plane parallel to the ground, Therefore, the visitor 100A in the image 121, The position of the 100B and the automatic door 200 varies depending on the inclination angle θ2 of the mounting surface 31. therefore, The image correcting unit 23 is preferably configured to change the number of divisions of the image 121 in accordance with the tilt angle θ2 of the mounting surface 31. another, The inclination angle θ2 of the mounting surface 31 can be input via the above-described operation unit 25. the following, The first modification of the embodiment will be specifically described with reference to Figs. 6A to 6C. The image correcting unit 23 is as shown in FIG. 6A. Divided into a plurality of (four in the illustrated example) regions according to the inclination angle θ2 of the mounting surface 31 (the first region 1211) Second area 1212 The third area 1213 and the fourth area 1214), Distortion corrections are made for each of a plurality of regions. another, PL1 in Figure 6A PL2 PL3 is a dividing line. E.g, When the inclination angle θ2 of the mounting surface 31 is 30 degrees, The image correcting unit 23 is as shown in FIG. 6B. By two dividing lines PL1 PL2 divides image 121 into first area 1211. The second area 1212 and the third area 1213. In this case, The image correcting unit pairs the first region 1211 which is assumed to contain the face of the visitor 100, The first distortion correction for correcting the distortion in the horizontal direction (the left and right direction of the image 121) is performed. also, The image correcting unit 23 pairs the second region 1212 between the first region 1211 and the third region 1213. The second distortion correction (two-dimensional direction distortion correction) for correcting the distortion in the horizontal direction and the vertical direction (the upper and lower directions of the image 121) is performed. and then, The image correcting unit 23 generates a third region 1213 into which the casing 20 of the walkie-talkie handset 2 is reflected. The third distortion correction for correcting distortion in the horizontal direction and the vertical direction is performed. at this time, The image correcting unit 23 is in the third distortion correction, In order to prevent the housing 20 from being reflected into the third area 1213, It is preferable to increase the correction intensity in the vertical direction to be higher than the second distortion correction. also, When the inclination angle θ2 of the mounting surface 31 is 45 degrees, The image correcting unit 23 is as shown in FIG. 6C. The image 121 is divided into a first region 1211 and a second region 1212 by one dividing line PL1. In this case, The image correcting unit 23 refers to the first region 1211 which is assumed to include the face of the visitor 100. The first distortion correction for correcting the distortion in the horizontal direction is performed. also, The image correcting unit 23 pairs the second region 1212 in which the casing 20 of the intercom 2 is generated. The second distortion correction for correcting the distortion in the horizontal direction and the vertical direction is performed. Here, Since the inclination angle of the mounting surface 31 becomes larger, The amount of reflection of the housing 20 is reduced, Therefore, the image correcting unit 23 preferably reduces the correction intensity in the vertical direction to be lower than the inclination angle θ2 of the mounting surface 31 by 30 degrees. As mentioned above, The number of divisions of the image 121 (the number of divisions of the plurality of regions) is changed by the inclination angle θ2 of the mounting surface 31, Distortion correction corresponding to the inclination angle θ2 of the mounting surface 31 can be performed. According to the above-described variation 1, the number of divisions of the image 121 is changed according to the inclination angle θ2 of the mounting surface 31 on which the interphone unit 2 is mounted, However, the number of divisions of the image 121 may be changed, for example, according to the inclination angle α1 of the lens 212 with respect to the imaging element 211. the following, Referring to FIG. 6B, Figure 6C and Figure 7, The second modification of the embodiment will be specifically described. Fig. 7 is a schematic view showing an example of installation of the interphone unit 2 according to the second modification of the embodiment. The intercom machine 2 is as described above, The lens 212 is configured to be tiltable with respect to the imaging element 211. When the central axis P2 (see FIG. 2) of the imaging element 211 coincides with the central axis of the lens 212, The optical axis P1 of the imaging unit 21 is P11. When the inclination angle α1 of the lens 212 with respect to the imaging element 211 is set to α11, The optical axis P1 of the imaging unit 21 is P12. also, When the inclination angle α1 of the lens 212 with respect to the imaging element 211 is set to α12 (α12>α11), The optical axis P1 of the imaging unit 21 is P13. E.g, When the tilt angle α1 of the lens 212 is α11, The image correcting unit 23 is as shown in FIG. 6C. The image 121 is divided into a first region 1211 and a second region 1212 by one dividing line PL1. In this case, The image correcting unit 23 refers to the first region 1211 which is assumed to include the face of the visitor 100. The first distortion correction for correcting the distortion in the horizontal direction is performed. also, The image correcting unit 23 pairs the second region 1212 in which the casing 20 of the intercom 2 is generated. The second distortion correction for correcting the distortion in the horizontal direction and the vertical direction is performed. also, When the tilt angle α1 of the imaging element 212 is α12 (α12>α11), The image correcting unit 23 is as shown in FIG. 6B. By 2 dividing lines PL1 The PL2 is divided into the first area 1211. The second area 1212 and the third area 1213. In this case, The image correcting unit 23 refers to the first region 1211 which is assumed to include the face of the visitor 100. Perform the first distortion correction that corrects only the distortion in the horizontal direction. also, The image correcting unit 23 pairs the second region 1212 between the first region 1211 and the third region 1213. The second distortion correction (two-dimensional direction distortion correction) for correcting distortion in the horizontal direction and the vertical direction is performed. and then, The image correcting unit 23 generates a third region 1213 into which the casing 20 of the walkie-talkie handset 2 is reflected. The third distortion correction for correcting distortion in the horizontal direction and the vertical direction is performed. at this time, The image correcting unit 23 is in the third distortion correction, In order to prevent the housing 20 from being reflected into the third area 1213, It is preferable to increase the correction intensity in the vertical direction to be higher than the second distortion correction. As mentioned above, The number of divisions of the image 121 (the number of divisions of the plurality of regions) is changed according to the inclination angle α1 of the lens 212 with respect to the imaging element 211, Distortion correction corresponding to the tilt angle α1 of the lens 212 can be performed. As in the above embodiments and variations 1, 2, When the image correcting unit 23 is mainly composed of a DSP or an FPGA, By program, The function of the image correcting unit 23 can be realized. which is, The program of this embodiment is a program for causing a computer to function as the image correcting unit 23 in the walkie-talkie system 10. According to the program, By causing the computer to function as the image correcting unit 23, The image distortion of the image 121 can be reduced, And reduce the visual sense of violation. the following, Other variations of the embodiment will be described. In the above embodiments and variations 1, 2, The case where the intercom machine 2 is a hall intercom is described as an example. However, the intercom machine 2 may be an access control telephone set installed in a household of each household. also, The walkie-talkie machine 1 is not limited to being installed in a residence of a collective house. For example, it may be a management room master machine installed in an administrator's room of a collective house. also, In the above embodiments and variations 1, 2, The case where the walkie-talkie system 10 is applied to a collective house is described as an example. However, the application object of the walkie-talkie system 10 is not limited to the collective residence. It can also be a single-family home. In this case, The walkie-talkie machine 1 is an indoor parent machine installed in a house. The intercom machine 2 is a doorphone that is installed outside the house. also, The application object of the walkie-talkie system 10 is not limited to the residence. It can also be a non-residential building such as a building or a factory. also, In the above embodiment and modification 1, 2, Taking the entire image 121 as the object of distortion correction, However, the object of the distortion correction may also be a part of the image 121. In this case, The image correcting unit 23 is configured to divide a part of the image 121 which is a target of distortion correction into a plurality of regions. It is only necessary to perform distortion correction for each of a plurality of regions. and then, In the above embodiments and variations 1, 2, When the image 121 is divided into 2, the center line L1 is equally divided by 2, However, it may be divided into two by a dividing line different from the center line L1. which is, The area above the dividing line is the first area, The second region, which is the lower side of the dividing line, may be of a different size. also, The same applies to dividing the image 121 into three or more. Each area can be equally divided, It can also be divided unevenly. also, In the above embodiment and modification 1, 2, In image 121, The area above the center line L1 is the first area 1211, The area on the lower side is the second area 1212, However, the first region 1211 and the second region 1212 may be reversed. which is, Can also be, The area above the center line L1 in the image 121 is the second area 1212, The area on the lower side is the first area 1211. According to this configuration, For example, when the optical axis P1 of the imaging unit 21 is set to face upward and a part of the upper side of the casing 20 is reflected in the image 121, The housing 20 can be prevented from being reflected in the image 121. and then, In the above variation 1, 2, It is configured such that the constructor inputs the inclination angle θ2 of the mounting surface 31 and the inclination angle α1 of the lens 212 during construction. In contrast, It is also possible to automatically input the inclination angle α1 of the lens 212 by, for example, a function of automatically tilting the lens 212. also, It is also possible to automatically measure the inclination angle θ2 of the mounting surface 31 when the interphone 2 is attached to the mounting table 3. also, In the above embodiments and variations 1, 2, The walkie-talkie system 10 including the walkie-talkie machine 1 and the walkie-talkie machine 2 has been described as an example. However, the above configuration can also be applied to, for example, an anti-theft camera or a car camera. and then, In the above embodiment and modification 1, 2, The case where the interphone 2 has the image correcting unit 23 will be described as an example. However, the intercom base unit 1 may have an image correcting unit. also, In the above embodiments and variations 1, 2, The case where the walkie-talkie machine 1 has the display unit 12 has been described as an example. In contrast, The display unit can be provided for both the indoor handset and the walkie-talkie base unit 1 installed in the household. It can also be a general-purpose mobile information terminal such as a smart phone or tablet terminal (PDA: Personal Digital Assistant, The personal digital assistant has a display unit. also, In the above embodiments and variations 1, 2, The case where the lens 212 is tiltable with respect to the imaging element 211 is described as an example. However, the imaging element 211 and the lens 212 may be integrally rotated. In this case, The image correcting unit 23 is preferably configured to perform distortion correction processing. The number of divisions of the plurality of regions is changed in accordance with the inclination angles of the imaging element 211 and the lens 212. also, The image correcting unit 23 may be configured to perform distortion correction processing. According to the tilt angle of the imaging element 211 and the lens 212, Since the first distortion correction, Among the second distortion correction and the third distortion correction, distortion correction is performed for each of the plurality of regions. The first distortion correction is a correction for correcting distortion in the left and right direction of the image. The second distortion correction is a correction for correcting distortion in the up and down direction of the image in the left and right direction. The third distortion correction is distortion in the left-right direction and the vertical direction of the corrected intensity correction image different from the second distortion correction. The embodiment described above is clear, The walkie-talkie system (10) of the first aspect is configured as a walkie-talkie system in which the walkie-talkie master (1) and the walkie-talkie slave (2) can communicate with each other. The walkie-talkie system (10) includes an image correcting unit (23) that corrects distortion correction processing of image distortion detected by the imaging unit (21) of the interphone unit (2). The image correcting unit (23) is configured to perform distortion correction processing. Dividing an area of the image that is a distortion correction target into a plurality of areas, Distortion corrections are made for each of a plurality of regions. According to the first aspect, The image correcting unit (23) divides the region to be subjected to the distortion correction into a plurality of regions. Performing distortion corrections for each of a plurality of regions, Therefore, compared with the case where the same distortion correction is performed on the entire image, Reduce image distortion, And reduce the visual sense of violation. The second aspect of the walkie-talkie system (10) is as in the first aspect, There is provided a corrected image obtained by displaying the image correcting unit (23), Or a display portion (12) of an image based on an image signal of the corrected image. According to the second aspect, The image corrected by the image correcting unit (23) can be displayed on the display unit (12). The walkie-talkie system (10) of the third aspect is like the first or second aspect, among them, The image correcting unit (23) is configured to be divided into a first region (1211) and a second region (1212). As a plurality of areas. The first area (1211) includes one of the areas in which the image (121) is divided into two in the up and down direction. The second area (1212) includes another area in which the image (121) is divided into two in the up and down direction. According to the third aspect, By performing distortion correction on the first region (1211) and the second region (1212), Can reduce the number of images divided, And reduce image distortion and reduce visual dissonance. However, this configuration is not a necessary component of the walkie-talkie system (10). As a plurality of areas, For example, it may be divided into three or more regions. The walkie-talkie system (10) in the fourth aspect is like the third aspect, among them, The first region (1211) and the second region (1212) refer to two regions equally divided by the center line (L1) 2 in the upper and lower directions of the image (121). According to the fourth aspect, Since it is divided into two areas by the center line (L1) 2, Therefore, when photographing a person (visitor), The face of the visitor can be included in one of the areas. And, By performing distortion correction on only one of the areas including the face in the horizontal direction (the left and right direction of the image (121)), Can reduce the face of the visitor unnaturally deformed. However, whether or not to adopt this configuration is arbitrary. The fifth aspect of the walkie-talkie system (10) is in the form of the third or fourth aspect, among them, The image correcting unit (23) is configured to perform distortion correction processing. Performing the first distortion correction in the first area (1211), The second distortion correction is performed in the second region (1212). In the first distortion correction, Correct the distortion of the left and right direction of the image (121). In the second distortion correction, Correct the distortion of the image (121) in the left and right direction and the up and down direction. According to the fifth aspect, The housing (20) can be reduced in comparison with the case where the first distortion correction is performed on the entire image. Further, it is possible to reduce the unnatural deformation of the face of the person (visitor) as compared with the case where the second distortion correction is performed on the entire image. which is, According to the fourth aspect, Compared with the case where the same distortion correction is performed on the entire image, Reduce image distortion, And reduce the visual sense of violation. However, whether or not to adopt this configuration is arbitrary. The walkie-talkie system (10) of the sixth aspect is like the first or second aspect, among them, The imaging unit (21) further includes a lens (212) that is tiltable with respect to the imaging element (211). The image correcting unit (23) is configured to perform distortion correction processing. According to the tilt angle (α1) of the lens (212), Change the number of divisions of a plurality of regions. According to the sixth aspect, A distortion correction process corresponding to the tilt angle (α1) of the lens (212) can be performed. However, this configuration is not a necessary component of the walkie-talkie system (10). For example, regardless of the tilt angle (α1) of the lens (212), The number of divisions in a plurality of regions is constant. The walkie-talkie system (10) of the seventh aspect is like the sixth aspect, among them, The image correcting unit (23) is in the distortion correcting process, According to the tilt angle (α1) of the lens (212), Since the first distortion correction, Second distortion correction, And the third distortion correction, Select the distortion correction you want to make for each of the multiple regions. In the first distortion correction, Correct the distortion of the left and right direction of the image (121). In the second distortion correction, Correct the distortion of the image (121) in the left and right direction and the up and down direction. In the third distortion correction, The distortion in the left-right direction and the vertical direction of the image (121) is corrected by the correction intensity different from the second distortion correction. According to the seventh aspect, According to the tilt angle (α1) of the lens (212), Since the first distortion correction, Second distortion correction, And the third distortion correction selects distortion correction to be performed for each of the plurality of regions. However, whether or not to adopt this configuration is arbitrary. The eighth aspect of the walkie-talkie system (10) is as in the first 2, 6 or 7 aspect, among them, The interphone (2) further includes a casing (20) that houses the imaging unit (21) and the transmission unit (221). The housing (20) is in such a manner that the central axis (P2) of the imaging element (211) is parallel to the normal direction of the mounting surface (31). The mounting surface (31) mounted on the mounting surface (31) is an inclined mounting table (3). The image correcting unit (23) is configured to perform distortion correction processing. According to the inclination angle (θ2) of the mounting surface (31), Change the number of divisions of a plurality of regions. According to the eighth aspect, A distortion correction process corresponding to the tilt angle (θ2) of the mounting surface (31) can be performed. However, this configuration is not a necessary component of the walkie-talkie system (10). For example, regardless of the inclination angle (θ2) of the mounting surface (31), The number of divisions in a plurality of regions is constant. The ninth aspect of the walkie-talkie system (10) is like the eighth aspect, among them, The image correcting unit (23) is in the distortion correcting process, According to the inclination angle (θ2) of the mounting surface (31), Since the first distortion correction, Second distortion correction, And the third distortion correction selects distortion correction to be performed for each of the plurality of regions. In the first distortion correction, Correct the distortion of the left and right direction of the image (121). In the second distortion correction, Correct the distortion of the image (121) in the left and right direction and the up and down direction. In the third distortion correction, The distortion in the left-right direction and the vertical direction of the image (121) is corrected by the correction intensity different from the second distortion correction. According to the ninth aspect, According to the inclination angle (θ2) of the mounting surface (31), Since the first distortion correction, Second distortion correction, And the third distortion correction selects distortion correction to be performed for each of the plurality of regions. However, whether or not to adopt this configuration is arbitrary. The walkie-talkie master (1) of the tenth aspect is used in the walkie-talkie system (10) of any of the first to ninth aspects. According to the tenth aspect, By using the intercom (1), A walkie-talkie system (10) that reduces image distortion and reduces visual discomfort can be provided. The interphone (2) of the (11) aspect is used in the walkie-talkie system (10) of any of the first to the ninth aspects. According to the eleventh aspect, By using the intercom machine (2), A walkie-talkie system (10) that reduces image distortion and reduces visual discomfort can be provided. The program of the twelfth aspect is such that the computer functions as the image correcting unit (23) in the walkie-talkie system (10) of any of the first to ninth aspects. According to the twelfth aspect, By using a computer as an image correcting unit (23), Reduce image distortion, And reduce the visual sense of violation.
1‧‧‧對講機母機1‧‧‧Interphones
2‧‧‧對講機子機2‧‧‧Interphones
3‧‧‧安裝台3‧‧‧Installation table
4‧‧‧傳送路徑4‧‧‧Transfer path
5‧‧‧集合住宅之公共空間5‧‧‧Common space for condominiums
10‧‧‧對講機系統10‧‧‧Intercom system
11‧‧‧母機通信部11‧‧‧Maternal Communication Department
12‧‧‧顯示部12‧‧‧ Display Department
13‧‧‧母機控制部13‧‧‧Master Machine Control Department
14‧‧‧圖像處理部14‧‧‧Image Processing Department
15‧‧‧操作部15‧‧‧Operation Department
20‧‧‧殼體20‧‧‧shell
21‧‧‧攝像部21‧‧‧Photography Department
22‧‧‧子機通信部22‧‧‧Site Communication Department
23‧‧‧圖像修正部23‧‧‧Image Correction Department
24‧‧‧子機控制部24‧‧‧Submachine Control Department
25‧‧‧操作部25‧‧‧Operation Department
26‧‧‧記憶部26‧‧‧Memory Department
31‧‧‧安裝面31‧‧‧Installation surface
100‧‧‧來訪者100‧‧‧ Visitors
100A‧‧‧來訪者100A‧‧‧ Visitors
100B‧‧‧來訪者100B‧‧‧ Visitors
111‧‧‧接收部111‧‧‧ Receiving Department
121‧‧‧圖像121‧‧‧ Images
200‧‧‧自動門200‧‧‧Automatic door
200A‧‧‧門片200A‧‧‧doors
200B‧‧‧門片200B‧‧‧doors
201‧‧‧邊界線201‧‧‧ boundary line
202‧‧‧邊界線202‧‧‧ boundary line
211‧‧‧攝像元件211‧‧‧Photographic components
212‧‧‧透鏡212‧‧‧ lens
221‧‧‧發送部221‧‧‧Send Department
1211‧‧‧第1區域1211‧‧‧1st area
1212‧‧‧第2區域1212‧‧‧2nd area
1213‧‧‧第3區域1213‧‧‧3rd area
1214‧‧‧第4區域1214‧‧‧4th area
L1‧‧‧中心線L1‧‧‧ center line
P1‧‧‧光軸P1‧‧‧ optical axis
P2‧‧‧中心軸P2‧‧‧ central axis
P11‧‧‧光軸P1P11‧‧‧ Optical axis P1
P12‧‧‧光軸P1P12‧‧‧ Optical axis P1
P13‧‧‧光軸P1P13‧‧‧ Optical axis P1
PL1‧‧‧分割線PL1‧‧‧ dividing line
PL2‧‧‧分割線PL2‧‧‧ dividing line
PL3‧‧‧分割線PL3‧‧‧ dividing line
α1‧‧‧傾斜角度11‧‧‧ tilt angle
α11‧‧‧傾斜角度α11111‧‧‧ tilt angle α1
α12‧‧‧傾斜角度α11212‧‧‧ tilt angle α1
θ1‧‧‧視野角Θ1‧‧‧ viewing angle
θ2‧‧‧傾斜角度Θ2‧‧‧ tilt angle
圖1係本發明之一實施形態之對講機系統之方塊圖。 圖2係顯示本發明之一實施形態之對講機子機之設置例之概略圖。 圖3A係於比較例1之對講機母機之顯示部中顯示之失真修正前之圖像之概略圖。圖3B係於同上之對講機母機之顯示部中顯示之失真修正後之圖像之概略圖。 圖4A係於比較例2之對講機母機之顯示部中顯示之失真修正前之圖像之概略圖。圖4B係於同上之對講機母機之顯示部中顯示之失真修正後之圖像之概略圖。 圖5A係於本實施形態之對講機母機之顯示部中顯示之失真修正前之圖像之概略圖。圖5B係於同上之對講機母機之顯示部中顯示之失真修正後之圖像之概略圖。 圖6A~圖6C係顯示於本發明之一實施形態之變化例1之對講機母機之顯示部中顯示之圖像之分割例之概略圖。 圖7係顯示本發明之一實施形態之變化例2之對講機子機之設置例之概略圖。BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a block diagram of a walkie-talkie system in accordance with an embodiment of the present invention. Fig. 2 is a schematic view showing an example of installation of a walkie-talkie sub-machine according to an embodiment of the present invention. Fig. 3A is a schematic view showing an image before distortion correction displayed on the display unit of the walkie-talkie main unit of Comparative Example 1. Fig. 3B is a schematic view showing an image after distortion correction displayed on the display unit of the same main unit. Fig. 4A is a schematic view showing an image before distortion correction displayed on the display unit of the walkie-talkie master of Comparative Example 2. Fig. 4B is a schematic view showing an image after distortion correction displayed on the display unit of the same main unit. Fig. 5A is a schematic view showing an image before distortion correction displayed on the display unit of the walkie-talkie machine of the embodiment. Fig. 5B is a schematic view showing an image after distortion correction displayed on the display unit of the intercom master. 6A to 6C are schematic diagrams showing an example of division of an image displayed on a display unit of a walkie-talkie master according to a first modification of the embodiment of the present invention. Fig. 7 is a schematic view showing an example of installation of a walkie-talkie sub-machine according to a second modification of the embodiment of the present invention.
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