智能門鎖經過指紋解鎖普及以后，開始走向3D人臉解鎖時代。和指紋鎖相比，3D人臉解鎖具有無感的體驗優勢，可以解放雙手，備受消費者青睞。目前市場上的3D人臉解鎖技術路線主要是三類：雙目立體視覺，3D結構光，ToF。
關于這三種技術路線的優劣勢可以參考下面的表格
安霸的芯片解決方案對(dui)于不同技術路(lu)線(xian)并無傾向性，均可以(yi)支持。安霸(ba)認為不同的(de)(de)技術路(lu)線(xian)的(de)(de) 3D 人臉智能解鎖的(de)(de)產品核心都是(shi)圍繞無感極致體(ti)驗，這里面包含三個重(zhong)要的(de)(de)技術維(wei)度(du)指標：
1. 人(ren)臉解鎖速度（做到人(ren)到即開(kai)門(men)無感）
2. 低功(gong)耗（長續航、低頻次更換電(dian)池無感(gan)）
3. 數據安全性(xing)（消(xiao)除用戶(hu)對個人信息安全擔憂的(de)無感）
下(xia)面將(jiang)從這三個維(wei)度展開(kai)說(shuo)說(shuo)安霸(ba)是(shi)如何通(tong)過技術上的打磨來(lai)提升產品體驗。
人臉解鎖速度優化
所有技(ji)(ji)術路線的(de)人(ren)臉(lian)解鎖過程(cheng)都包含三個階段(duan)的(de)耗時(shi)(shi)： A（系(xi)統(tong)啟動時(shi)(shi)間(jian))，B（人(ren)臉(lian)檢測深度生成，活體檢測時(shi)(shi)間(jian)），C（人(ren)臉(lian)數據庫比對時(shi)(shi)間(jian))。一次完整(zheng)的(de)人(ren)臉(lian)解鎖應用(yong)耗時(shi)(shi)就是(shi)A+B+C三者合(he)一的(de)耗時(shi)(shi)，任何一個時(shi)(shi)間(jian)節點都需要精心打磨，盡量縮短耗時(shi)(shi)以實現(xian)極(ji)速人(ren)臉(lian)解鎖。下(xia)面是(shi)安霸的(de)CV2x系(xi)列芯片解決方案通過以下(xia)技(ji)(ji)術手段(duan)來實現(xian)各(ge)個階段(duan)的(de)加(jia)速，疊加(jia)客戶應用(yong)軟件耗時(shi)(shi)，最終依然(ran)實現(xian)一秒內(nei)人(ren)臉(lian)解鎖的(de)極(ji)致無感體驗。
A：優化(hua)減小代碼大小，對(dui)(dui)存儲(chu)器帶寬優化(hua)提(ti)升(sheng)讀取速度，減少軟件(jian)加載(zai)時(shi)間，對(dui)(dui)所有硬件(jian)優化(hua)I/O性能，采取并行化(hua)初始(shi)化(hua)處理(li)，縮短硬件(jian)初始(shi)化(hua)所需時(shi)間。
B：安霸的芯片方(fang)案提供(gong)豐富的硬件加(jia)速算(suan)子，針對不同3D技術(shu)路線(xian)所(suo)需的深度計算(suan)加(jia)速，可(ke)以有效(xiao)縮短人(ren)臉檢測(ce)和活體檢測(ce)所(suo)需時(shi)(shi)間(jian)，做到最(zui)短時(shi)(shi)間(jian)獲取豐富的人(ren)臉深度信息，提供(gong)給活體檢測(ce)算(suan)法(fa)以達到最(zui)快、最(zui)準確(que)地活體檢測(ce)結果輸出。
C：安霸(ba)芯片專用(yong)的視(shi)覺感知深度(du)學習(xi)引擎(qing)，可(ke)支持各種人臉(lian)(lian)比對(dui)算法優化來提升(sheng)人臉(lian)(lian)比對(dui)速度(du)和準(zhun)確(que)度(du)，縮(suo)短人臉(lian)(lian)比對(dui)時(shi)間和提升(sheng)比對(dui)準(zhun)確(que)率。
功耗優化
對(dui)3D人(ren)(ren)臉(lian)(lian)智(zhi)能(neng)(neng)(neng)門鎖(suo)系統而(er)言(yan)，功(gong)耗(hao)(hao)包含兩方(fang)面：A（系統待(dai)機功(gong)耗(hao)(hao))+B（系統工作功(gong)耗(hao)(hao))。目前市面上大(da)多數(shu)人(ren)(ren)臉(lian)(lian)解(jie)(jie)鎖(suo)設(she)備都因為增(zeng)加(jia)3D人(ren)(ren)臉(lian)(lian)識別功(gong)能(neng)(neng)(neng)帶(dai)來功(gong)耗(hao)(hao)的(de)(de)成(cheng)倍增(zeng)加(jia)，只能(neng)(neng)(neng)拋(pao)棄傳統指(zhi)紋鎖(suo)里的(de)(de)多節(jie)干電(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)供電(dian)(dian)(dian)(dian)技術路線，采(cai)用單位體積(ji)內能(neng)(neng)(neng)量(liang)密度(du)更(geng)大(da)鋰電(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)供電(dian)(dian)(dian)(dian)，而(er)鋰電(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)電(dian)(dian)(dian)(dian)量(liang)一次放電(dian)(dian)(dian)(dian)完成(cheng)更(geng)換需(xu)要一個漫(man)長(chang)的(de)(de)充(chong)電(dian)(dian)(dian)(dian)等待(dai)時(shi)間，不(bu)能(neng)(neng)(neng)實(shi)現無(wu)感電(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)替換，采(cai)用安(an)(an)霸的(de)(de)人(ren)(ren)臉(lian)(lian)解(jie)(jie)鎖(suo)方(fang)案(an)(an)(an)，智(zhi)能(neng)(neng)(neng)門鎖(suo)產品可以(yi)有效降(jiang)低(di)系統待(dai)機功(gong)耗(hao)(hao)和工作功(gong)耗(hao)(hao)，讓(rang)3D人(ren)(ren)臉(lian)(lian)智(zhi)能(neng)(neng)(neng)門鎖(suo)回(hui)歸干電(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)供電(dian)(dian)(dian)(dian)解(jie)(jie)決(jue)方(fang)案(an)(an)(an)成(cheng)為可能(neng)(neng)(neng)。當(dang)電(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)電(dian)(dian)(dian)(dian)量(liang)耗(hao)(hao)盡(jin)，用戶可以(yi)零等待(dai)實(shi)現無(wu)感電(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)替換。即便是使用大(da)容(rong)量(liang)鋰電(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)供電(dian)(dian)(dian)(dian)方(fang)案(an)(an)(an)，安(an)(an)霸方(fang)案(an)(an)(an)也可以(yi)賦能(neng)(neng)(neng)3D人(ren)(ren)臉(lian)(lian)智(zhi)能(neng)(neng)(neng)門鎖(suo)實(shi)現更(geng)長(chang)時(shi)間的(de)(de)單次充(chong)放電(dian)(dian)(dian)(dian)續航(hang)，降(jiang)低(di)鋰電(dian)(dian)(dian)(dian)池(chi)(chi)(chi)(chi)充(chong)電(dian)(dian)(dian)(dian)頻次。下面是安(an)(an)霸CV2x系列芯片解(jie)(jie)決(jue)方(fang)案(an)(an)(an)從A、B兩個方(fang)面針對(dui)產品功(gong)耗(hao)(hao)做出的(de)(de)技術優化細節(jie)。
A：安(an)霸通過軟(ruan)、硬(ying)件設計來優化系統(tong)冷啟(qi)動所需時間（150ms以內(nei)即(ji)可(ke)完成啟(qi)動系統(tong)），這(zhe)樣人(ren)臉解鎖模塊不(bu)需要維持低功耗(hao)待(dai)機(ji)模式即(ji)可(ke)獲得人(ren)臉解鎖快(kuai)速(su)喚醒，平常處(chu)于零(ling)功耗(hao)關機(ji)狀態(tai)，在傳統(tong)指紋鎖基礎上只需要一個微安(an)級電流PIR模塊待(dai)機(ji)，只有監測到人(ren)接近(jin)才開(kai)啟(qi)人(ren)臉解鎖運行，實現超低功耗(hao)待(dai)機(ji)。
B: 安霸(ba)領(ling)先的10nm工(gong)藝低功(gong)耗(hao)芯(xin)片+人臉解(jie)鎖速(su)度優化，大大降低系統運行基礎功(gong)耗(hao)和(he)縮短單次解(jie)鎖工(gong)作(zuo)時(shi)長(chang)來(lai)延長(chang)電(dian)池續航，同(tong)時(shi)安霸(ba)獨有的硬件(jian)加速(su)識(shi)別模(mo)塊(kuai)可以(yi)在系統喚醒(xing)(xing)以(yi)后迅(xun)速(su)檢測人臉和(he)識(shi)別人形是否存在，準確(que)判斷PIR誤觸發(fa)帶(dai)來(lai)的無效喚醒(xing)(xing)，系統可智(zhi)能化迅(xun)速(su)進入再休眠狀(zhuang)態，降低PIR無效喚醒(xing)(xing)帶(dai)來(lai)的額外功(gong)耗(hao)增(zeng)加。
正(zheng)是基于這兩個(ge)方面系統功耗優化，安霸CV2x系列芯片方案(an)可以實現只用干(gan)電池供(gong)電就續航6個(ge)月（基于每天(tian)15次解鎖使用頻次）。
數據安全實現
隨(sui)著國家數據(ju)(ju)安(an)(an)(an)全(quan)(quan)(quan)(quan)法的發(fa)布和用(yong)戶對人臉(lian)數據(ju)(ju)安(an)(an)(an)全(quan)(quan)(quan)(quan)意識(shi)的提(ti)升(sheng)，人臉(lian)鎖的數據(ju)(ju)安(an)(an)(an)全(quan)(quan)(quan)(quan)也(ye)提(ti)升(sheng)到了越來越重(zhong)要的位置，安(an)(an)(an)全(quan)(quan)(quan)(quan)性成為用(yong)戶購買產品(pin)的重(zhong)要衡量(liang)指標(biao)。安(an)(an)(an)霸(ba)CV2x系(xi)列芯片(pian)從(cong)芯片(pian)級(ji)就(jiu)內建信息安(an)(an)(an)全(quan)(quan)(quan)(quan)硬件模塊，借助(zhu)(zhu)于芯片(pian)級(ji)的硬件加密算法，安(an)(an)(an)霸(ba)的軟件SDK可以幫(bang)助(zhu)(zhu)客(ke)戶產品(pin)建立安(an)(an)(an)全(quan)(quan)(quan)(quan)執行環境(jing)和信任簽名驗證(zheng)機制，安(an)(an)(an)霸(ba)提(ti)供(gong)從(cong)硬件到軟件的整體磐石安(an)(an)(an)全(quan)(quan)(quan)(quan)架(jia)構，確保系(xi)統從(cong)啟動、OTA升(sheng)級(ji)、用(yong)戶數據(ju)(ju)隱私和數據(ju)(ju)存儲傳輸(shu)等各(ge)個方面(mian)都得安(an)(an)(an)全(quan)(quan)(quan)(quan)保護，助(zhu)(zhu)力門(men)鎖產品(pin)達(da)到金(jin)融支付(fu)級(ji)別的安(an)(an)(an)全(quan)(quan)(quan)(quan)認(ren)證(zheng)。
3D人臉智能門鎖的技術走向
3D人(ren)臉智能(neng)(neng)門鎖(suo)的(de)(de)(de)技(ji)(ji)(ji)術走向是將會(hui)集成(cheng)越來越多的(de)(de)(de)視(shi)覺功(gong)(gong)能(neng)(neng)，其(qi)中電(dian)(dian)(dian)子(zi)貓(mao)眼(yan)功(gong)(gong)能(neng)(neng)會(hui)變成(cheng)剛需，目前三種技(ji)(ji)(ji)術路(lu)線(xian)人(ren)臉識別解鎖(suo)都可(ke)(ke)以(yi)(yi)(yi)在(zai)其(qi)基(ji)礎上增加(jia)一(yi)個高(gao)分(fen)辨率RGB攝(she)(she)像(xiang)頭(tou)來實(shi)(shi)現(xian)(xian)(xian)(xian)電(dian)(dian)(dian)子(zi)貓(mao)眼(yan)，這樣做的(de)(de)(de)好處(chu)是可(ke)(ke)以(yi)(yi)(yi)采用模塊化設計(ji)輕松實(shi)(shi)現(xian)(xian)(xian)(xian)產(chan)品(pin)的(de)(de)(de)升級.而(er)安(an)(an)(an)霸除了支持(chi)提供這樣的(de)(de)(de)技(ji)(ji)(ji)術升級，基(ji)于其(qi)中的(de)(de)(de)3D結構光(guang)技(ji)(ji)(ji)術路(lu)線(xian)，安(an)(an)(an)霸可(ke)(ke)以(yi)(yi)(yi)獨家提供單(dan)攝(she)(she)像(xiang)頭(tou)實(shi)(shi)現(xian)(xian)(xian)(xian)3D人(ren)臉解鎖(suo)+電(dian)(dian)(dian)子(zi)貓(mao)眼(yan)功(gong)(gong)能(neng)(neng)，這樣既(ji)節省系(xi)(xi)統(tong)成(cheng)本，還可(ke)(ke)以(yi)(yi)(yi)維持(chi)門鎖(suo)單(dan)攝(she)(she)像(xiang)頭(tou)外觀不變不增加(jia)額外的(de)(de)(de)開孔，通過安(an)(an)(an)霸獨有(you)的(de)(de)(de)ISP處(chu)理優勢，可(ke)(ke)以(yi)(yi)(yi)實(shi)(shi)現(xian)(xian)(xian)(xian)單(dan)攝(she)(she)像(xiang)頭(tou)的(de)(de)(de)RGB和IR通道(dao)拆分(fen)處(chu)理，同(tong)時滿足3D刷臉和電(dian)(dian)(dian)子(zi)貓(mao)眼(yan)各自(zi)獨立數(shu)據通道(dao)輸入需求(qiu)，并且ISP基(ji)于攝(she)(she)像(xiang)頭(tou)控制(zhi)曝(pu)光(guang)同(tong)步基(ji)準，可(ke)(ke)以(yi)(yi)(yi)精準控制(zhi)結構光(guang)和紅(hong)外夜(ye)視(shi)補(bu)光(guang)分(fen)時照(zhao)射，避免同(tong)頻光(guang)譜干(gan)擾。 此外安(an)(an)(an)霸ISP還可(ke)(ke)以(yi)(yi)(yi)實(shi)(shi)現(xian)(xian)(xian)(xian)RGB和IR融合，實(shi)(shi)現(xian)(xian)(xian)(xian)夜(ye)晚微光(guang)全(quan)彩效果，讓電(dian)(dian)(dian)子(zi)貓(mao)眼(yan)功(gong)(gong)能(neng)(neng)在(zai)夜(ye)視(shi)環(huan)境也呈現(xian)(xian)(xian)(xian)豐富的(de)(de)(de)彩色信息。安(an)(an)(an)霸基(ji)于CV2x系(xi)(xi)列芯片(pian)推出從200萬(wan)到(dao)800萬(wan)像(xiang)素的(de)(de)(de)全(quan)系(xi)(xi)列單(dan)攝(she)(she)像(xiang)頭(tou)解決方案（如下(xia)圖）。均在(zai)海外頭(tou)部門禁品(pin)牌客(ke)戶(hu)端實(shi)(shi)現(xian)(xian)(xian)(xian)產(chan)品(pin)量產(chan)。
當然，安(an)霸芯(xin)(xin)片(pian)(pian)方案也支持多攝像(xiang)頭(tou)的應(ying)用(yong)，具(ju)體產(chan)(chan)品(pin)會根(gen)據(ju)(ju)客戶對產(chan)(chan)品(pin)的定(ding)義(yi)進行設計開發。芯(xin)(xin)片(pian)(pian)與底層驅動、應(ying)用(yong)軟(ruan)件的緊(jin)密結(jie)合才(cai)能真正做到極(ji)致的無感解鎖體驗(yan)，而芯(xin)(xin)片(pian)(pian)的架(jia)構設計則從根(gen)本上決定(ding)了最終的產(chan)(chan)品(pin)能力。安(an)霸將在3D人(ren)臉(lian)智能門鎖領域持續推出自(zi)己獨到的技術(shu)路線(xian)和實(shi)現方式(shi)，客戶采(cai)用(yong)安(an)霸CV2x系列芯(xin)(xin)片(pian)(pian)解決方案可在3D人(ren)臉(lian)智能門鎖產(chan)(chan)品(pin)上，依據(ju)(ju)自(zi)身(shen)實(shi)際需求和供應(ying)鏈整合，靈活采(cai)用(yong)不(bu)同(tong)技術(shu)路線(xian)，實(shi)現人(ren)無我有，人(ren)有我優的產(chan)(chan)品(pin)差異化。
