OCR識別
# PinToo之OCR識別
# 1. 說明
範例使用智能手機上的PinToo應用程式，通過WebAPI進行圖片的識別。在使用該功能前需要獲取百度智能云OCR識別 (opens new window)API Key與Secret Key。
通過範例，可以瞭解fxBaidyAPI的使用方法並結合實體進行識別功能的應用。
# 2. 設計明細
開啟PinToo設計器，分別加入下插圖之控制元件。或者點選左上角的[打開模板Lib檔案]，選擇模板檔案來打開對應模板。
①：TfxActionList元件，控制元件名稱為fxActionList1。
②：TfxImage元件，控制元件名稱為fxImage1。
③：TfxLabel元件，控制元件名稱為fxLabel2。
④：TfxBaiduAPI元件，控制元件名稱為fxBaiduAPI1。
⑤：TfxSuperButton元件，控制元件名稱為fxSuperButtonTakePicture。
⑥：TfxSuperButton元件，控制元件名稱為fxSuperButtonLicensePlate。
⑦：TfxSuperButton元件，控制元件名稱為fxSuperButtonCarInfo。
⑧：TfxSuperButton元件，控制元件名稱為fxSuperButtonGeneral。
fxRunFrame屬性設定
Height：設定頁面高度=800。Width：設定頁面寬度=400。
①fxActionList1屬性設定 雙擊
fxActionList，在彈出的視窗中，新增一個TTakePhotoFromCameraAction（從相機拍照獲取圖片）
②fxImage1屬性設定
Height：設定控制元件高度=380。Width：設定控制元件寬度=345。WarpMode：設定影象在控制元件中顯示的模式，設定為Fit，即影象適應于控制元件大小。Bitmap：設定顯示的圖片，雙擊該屬性或者點選屬性右側的[...]打開影象編輯器。點選[Load...]打開資源管理器，選擇所需的圖片後點擊[打開]，選擇的影象會顯示在預覽框中。可在該頁面下進行裁切或者縮放畫素以使影象與控制元件的寬度高度相適應，修改完成後點選[OK]按鈕完成影象修改。
③fxLabel2屬性設定
Height：設定控制元件高度=30。Width：設定控制元件寬度=365。Text：設定文字內容=車牌識別結果：TextSettings：設定文字樣式。其中Font.Size=18，Font.Style中勾選fxBold。使用該設定需要取消StyledSettings中的全部勾選的選項。
④fxBaiduAPI1屬性設定
APIKey：輸入設定的APIKey，該項在百度智能云OCR識別 (opens new window)獲取。Secret：輸入設定的Secret，該項在百度智能云OCR識別 (opens new window)獲取。
⑤fxSuperButtonTakePicture屬性設定
Height：設定控制元件高度=100。Width：設定控制元件寬度=100。ButtonType：設定按鈕型別，設定為TfxSvgButton。Name：設定控制元件名稱=fxSuperButtonTakePicture。ColorBegin：設定初始顏色=Aliceblue。ButtonType.SvgData：設定SVG數據，其數據內容如下。
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Height：設定控制元件高度=40。Width：設定控制元件寬度=120。ButtonType：設定按鈕型別，設定為TfxSvgButton。Name：設定控制元件名稱=fxSuperButtonLicensePlate。ColorBegin：設定初始顏色=Aliceblue。ButtonType.AlgnType：設定影象與文字的相對位置=aLeft。ButtonType.Text：設定按鈕顯示的文字內容=車牌識別。ButtonType.TextSettings：設定文字顯示樣式的選項，其中Font.Size = 18，Font.Style中將fsBold勾選，HorzAlign設定為Center。ButtonType.SvgData：設定SVG數據，其數據內容如下。
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2⑦fxSuperButtonCarInfo屬性設定
Height：設定控制元件高度=40。Width：設定控制元件寬度=120。ButtonType：設定按鈕型別，設定為TfxSvgButton。Name：設定控制元件名稱=fxSuperButtonCarInfo。ColorBegin：設定初始顏色=Aliceblue。ButtonType.AlgnType：設定影象與文字的相對位置=aLeft。ButtonType.Text：設定按鈕顯示的文字內容=車型識別。ButtonType.TextSettings：設定文字顯示樣式的選項，其中Font.Size = 18，Font.Style中將fsBold勾選，HorzAlign設定為Center。ButtonType.SvgData：設定SVG數據，其數據內容如下。
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10⑧fxSuperButtonGeneral屬性設定
Height：設定控制元件高度=40。Width：設定控制元件寬度=120。ButtonType：設定按鈕型別，設定為TfxSvgButton。Name：設定控制元件名稱=fxSuperButtonGeneral。ColorBegin：設定初始顏色=Aliceblue。ButtonType.AlgnType：設定影象與文字的相對位置=aLeft。ButtonType.Text：設定按鈕顯示的文字內容=文字識別。ButtonType.TextSettings：設定文字顯示樣式的選項，其中Font.Size = 18，Font.Style中將fsBold勾選，HorzAlign設定為Center。ButtonType.SvgData：設定SVG數據，其數據內容如下。
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# 3. 程式設計
點選程式設計界面右下角的按鈕，切換至單元選擇界面，勾選需要使用的單元。該程式需要引用 uBaiduAPI 單元。
# 3.1. 程式初始設定
該程式無初始設定。
# 3.2. 事件設定
- ⑤fxSuperButtonTakePicture-OnClick事件
點選按鈕，打開照相界面拍攝影象。
Procedure fxSuperButtonTakePictureOnClick(Sender: TObject);
//拍照
Begin
TakePhotoFromCameraAction1.ExecuteTarget(nil);
End;
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- ①fxActionList1.TakePhotoFromCameraAction1-OnFinishTaking事件
當照相機獲取到影象后，將影象傳遞給影象控制元件。
Procedure TakePhotoFromCameraAction1OnDidFinishTaking(Image: TBitmap);
//結束拍照，回傳照片
Begin
fximage1.Bitmap.Assign(Image);
End;
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- ⑥fxSuperButtonLicensePlate-OnClick事件
當點選[車牌識別]按鈕后，進行車牌識別。
Procedure fxSuperButtonLicensePlateOnClick(Sender: TObject);
//識別車牌
Begin
fxBaiduAPI1.doBitmapToLicensePlate(fxImage1.Bitmap);
End;
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- ④fxBaiduAPI1-OnlicensePlate事件
當控制元件接收到車牌識別的結果時，顯示在標籤控制元件中。
- ⑦fxSuperButtonCarInfo-OnClick事件
當點選[車型識別]按鈕后，進行車型識別。
Procedure fxSuperButtonCarInfoOnClick(Sender: TObject);
//識別車型
Begin
ShowMessage(fxBaiduAPI1.doBitmapToCarInfo(fxImage1.Bitmap));
End;
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- ⑧fxSuperButtonGeneral-OnClick事件
當點選[文字識別]按鈕后，進行通用文字識別並返回識別的結果。
Procedure fxSuperButtonGeneralOnClick(Sender: TObject);
//通用文字識別
Begin
ShowMessage(fxBaiduAPI1.doBitmapToGeneralBasic(fxImage1.Bitmap));
End;
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# 4. 運行結果
使用滑鼠在 PinToo 功能表，點選[儲存至資料庫]按鈕，將其儲存至資料庫，點選[除錯運行]確認能夠正常打開。
通過同步中心，將程式上傳至手機PinToo運行；同步時，請確保手機已經運行PinToo，並且已經登陸。
點選拍照按鈕進行拍照，拍照完成後返回到程式界面，點選[車牌識別]、[車型識別]、[文字識別]按鈕進行對應的操作。檢視識別的結果。