基于視覺的手勢識別：工業(yè)控制應(yīng)用的理想人機(jī)界面

　　嵌入式視覺是基于計算機(jī)視覺系統(tǒng)的進(jìn)化和外推，它處理和解釋靜態(tài)圖像和視頻圖像的意義，有望成為下一個重大的技術(shù)成功故事。例如，考慮現(xiàn)在在蜂窩電話、平板電腦、筆記本電腦和專用計算機(jī)顯示器中常見的圖像傳感器和處理器。最初用于視頻會議和攝影，他們現(xiàn)在被用于其他應(yīng)用程序，如增強(qiáng)現(xiàn)實。［ 1 ］。

　　同樣，考慮新興流行的消費監(jiān)控系統(tǒng)，由攝像機(jī)和其子系統(tǒng)的持續(xù)改進(jìn)的驅(qū)動，以及越來越人性化相關(guān)的監(jiān)控軟件和服務(wù)。［ 2 ］，誰最近已經(jīng)知道買汽車，圖像傳感器在車輛周圍許多地方越來越發(fā)現(xiàn)，利用泊車輔助、后視安全，即將發(fā)生的碰撞預(yù)警，車道偏離警告等功能。［ 3 ］

　　同樣強(qiáng)大的功能和成本效益的圖像傳感器，處理器，內(nèi)存設(shè)備，I/O收發(fā)器，以及在前面提到的系統(tǒng)中使用的其他集成電路同樣適用于視覺包容性工業(yè)自動化應(yīng)用開發(fā)人員。基于手勢的人機(jī)界面在許多方面都是理想的，因此在這種環(huán)境中越來越普遍。一方面，他們是直觀的；為什么要點擊鼠標(biāo)、按鈕，甚至滑動手指在觸摸屏上翻頁或在菜單頁中移動，而不是只在空中掃你的手。

　　A gesture-based UI also dispenses with the environmental restrictions that often hamper a touch-based interface; water and other fluids， non-conductive gloves， dirt and germs， etc. However， a first-generation motion implementation such as that utilized by the Nintendo? Wii? game console system has limitations of its own. An easy-to-lose， breakable， in-hand controller is required to implement the scheme. Additionally， the interface between the controller and the system， usually implemented via Bluetooth?， ZigBee? or some other RF wireless technology， is （like a touchscreen interface） vulnerable to functional degradation due to environmental EMI.

　　Instead， consider an image sensor-inclusive design. Vision-based gesture interfaces use the human body as the controller versus a dedicated piece of extra hardware， interpreting hand， arm， and other body movements. They are comparatively EMI-immune; all that you need to ensure is sufficient operator-to-equipment distance along with adequate ambient lighting. In addition to gesture-based control， and as with the earlier mentioned computers and cell phones， you can use facial recognition technology to not only “unlock” the system in response to the presence of a valid operator‘s visage but also custom-configure the system on the fly for any particular operator， logging into a specific user account， for example.［4］ They can also offer a more extensive suite of user control options than does a coarser-grained accelerometer- or gyroscope-based motion interface.