Ocr 图文识别技术——基于百度云OCR技术学习与总结

Ocr 图文识别技术——基于百度云OCR技术学习与总结

1.百度智能云控制台 https://console.bce.baidu.com/ai/?fromai=1#/ai/ocr/overview/index 创建应用，生成API Key，Secret Key

2.在应用详情页面下载对应应用的授权文件

3.百度智能云 Android-SDK文档链接：https://cloud.baidu.com/doc/OCR/s/fjwvxzeiy

4.SDK下载地址：http://ai.baidu.com/sdk/#ocr

下面我跟大家讲一下开发步骤。

1.下载sdk

2.依赖sdk以及armeabi到lib目录下

3.下载的sdk里面有一个ocr-ui model，如果需要的话，可以作为model到项目中

4.清单文件添加权限：

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

5.Proguard配置：app——proguard-rules.pro

-keep class com.baidu.ocr.sdk.**{*;}
-dontwarn com.baidu.ocr.**

6.代码中：初始化OCR单例：

OCR.getInstance().initAccessTokenWithAkSk(new OnResultListener<AccessToken>() {@Overridepublic void onResult(AccessToken result) {// 调用成功，返回AccessToken对象String token = result.getAccessToken();}@Overridepublic void onError(OCRError error) {// 调用失败，返回OCRError子类SDKError对象}
}, getApplicationContext(), "您的应用AK", "您的应用SK");

7.功能调用以及回调事件：

@Override
public void onClick(View v) {switch (v.getId()) {case R.id.tv_car://车牌识别Intent intent = new Intent(MainActivity.this, CameraActivity.class);intent.putExtra(CameraActivity.KEY_OUTPUT_FILE_PATH,FileUtils.getSaveFile(getApplication()).getAbsolutePath());intent.putExtra(CameraActivity.KEY_CONTENT_TYPE,CameraActivity.CONTENT_TYPE_GENERAL);startActivityForResult(intent, REQUEST_CODE_LICENSE_PLATE);break;case R.id.tv_company://营业执照识别Intent intentCompany = new Intent(MainActivity.this, CameraActivity.class);intentCompany.putExtra(CameraActivity.KEY_OUTPUT_FILE_PATH,FileUtils.getSaveFile(getApplication()).getAbsolutePath());intentCompany.putExtra(CameraActivity.KEY_CONTENT_TYPE,CameraActivity.CONTENT_TYPE_GENERAL);startActivityForResult(intentCompany, REQUEST_CODE_BUSINESS_LICENSE);break;case R.id.general_basic://通用文字识别Intent intentGener = new Intent(MainActivity.this, CameraActivity.class);intentGener.putExtra(CameraActivity.KEY_OUTPUT_FILE_PATH,FileUtils.getSaveFile(getApplication()).getAbsolutePath());intentGener.putExtra(CameraActivity.KEY_CONTENT_TYPE,CameraActivity.CONTENT_TYPE_GENERAL);startActivityForResult(intentGener, REQUEST_CODE_GENERAL_BASIC);break;case R.id.accurate_basic://通用文字识别(高精度版)Intent intentAccur = new Intent(MainActivity.this, CameraActivity.class);intentAccur.putExtra(CameraActivity.KEY_OUTPUT_FILE_PATH,FileUtils.getSaveFile(getApplication()).getAbsolutePath());intentAccur.putExtra(CameraActivity.KEY_CONTENT_TYPE,CameraActivity.CONTENT_TYPE_GENERAL);startActivityForResult(intentAccur, REQUEST_CODE_GENERAL_ENHANCED);break;case R.id.general_location://通用文字识别（含位置信息版）Intent intentGenLoca = new Intent(MainActivity.this, CameraActivity.class);intentGenLoca.putExtra(CameraActivity.KEY_OUTPUT_FILE_PATH,FileUtils.getSaveFile(getApplication()).getAbsolutePath());intentGenLoca.putExtra(CameraActivity.KEY_CONTENT_TYPE,CameraActivity.CONTENT_TYPE_GENERAL);startActivityForResult(intentGenLoca, REQUEST_CODE_GENERAL);break;case R.id.accurate_location://通用文字识别(高精度含位置信息版)Intent intentAccuLoca = new Intent(MainActivity.this, CameraActivity.class);intentAccuLoca.putExtra(CameraActivity.KEY_OUTPUT_FILE_PATH,FileUtils.getSaveFile(getApplication()).getAbsolutePath());intentAccuLoca.putExtra(CameraActivity.KEY_CONTENT_TYPE,CameraActivity.CONTENT_TYPE_GENERAL);startActivityForResult(intentAccuLoca, REQUEST_CODE_ACCURATE);break;case R.id.general_enhance://通用文字识别（含生僻字版）Intent intentEnhance = new Intent(MainActivity.this, CameraActivity.class);intentEnhance.putExtra(CameraActivity.KEY_OUTPUT_FILE_PATH,FileUtils.getSaveFile(getApplication()).getAbsolutePath());intentEnhance.putExtra(CameraActivity.KEY_CONTENT_TYPE,CameraActivity.CONTENT_TYPE_GENERAL);startActivityForResult(intentEnhance, REQUEST_CODE_GENERAL_ENHANCED);break;case R.id.general_webimage://网络图片文字识别Intent intentWeb = new Intent(MainActivity.this, CameraActivity.class);intentWeb.putExtra(CameraActivity.KEY_OUTPUT_FILE_PATH,FileUtils.getSaveFile(getApplication()).getAbsolutePath());intentWeb.putExtra(CameraActivity.KEY_CONTENT_TYPE,CameraActivity.CONTENT_TYPE_GENERAL);startActivityForResult(intentWeb, REQUEST_CODE_GENERAL_WEBIMAGE);break;case R.id.idcard://身份证识别Intent intentIdCard = new Intent(MainActivity.this, IDCardActivity.class);startActivity(intentIdCard);break;case R.id.bankcard://银行卡识别Intent intentBank = new Intent(MainActivity.this, CameraActivity.class);intentBank.putExtra(CameraActivity.KEY_OUTPUT_FILE_PATH,FileUtils.getSaveFile(getApplication()).getAbsolutePath());intentBank.putExtra(CameraActivity.KEY_CONTENT_TYPE,CameraActivity.CONTENT_TYPE_BANK_CARD);startActivityForResult(intentBank, REQUEST_CODE_BANKCARD);break;case R.id.driving_license://驾驶证识别Intent intentDirver = new Intent(MainActivity.this, CameraActivity.class);intentDirver.putExtra(CameraActivity.KEY_OUTPUT_FILE_PATH,FileUtils.getSaveFile(getApplication()).getAbsolutePath());intentDirver.putExtra(CameraActivity.KEY_CONTENT_TYPE,CameraActivity.CONTENT_TYPE_GENERAL);startActivityForResult(intentDirver, REQUEST_CODE_VEHICLE_LICENSE);break;case R.id.vehicle_license://行驶证识别Intent intentVehicle = new Intent(MainActivity.this, CameraActivity.class);intentVehicle.putExtra(CameraActivity.KEY_OUTPUT_FILE_PATH,FileUtils.getSaveFile(getApplication()).getAbsolutePath());intentVehicle.putExtra(CameraActivity.KEY_CONTENT_TYPE,CameraActivity.CONTENT_TYPE_GENERAL);startActivityForResult(intentVehicle, REQUEST_CODE_DRIVING_LICENSE);break;case R.id.receipt://通用票据识别Intent intentReceipt = new Intent(MainActivity.this, CameraActivity.class);intentReceipt.putExtra(CameraActivity.KEY_OUTPUT_FILE_PATH,FileUtils.getSaveFile(getApplication()).getAbsolutePath());intentReceipt.putExtra(CameraActivity.KEY_CONTENT_TYPE,CameraActivity.CONTENT_TYPE_GENERAL);startActivityForResult(intentReceipt, REQUEST_CODE_RECEIPT);break;case R.id.passport://护照识别Intent intentPassport = new Intent(MainActivity.this, CameraActivity.class);intentPassport.putExtra(CameraActivity.KEY_OUTPUT_FILE_PATH,FileUtils.getSaveFile(getApplication()).getAbsolutePath());intentPassport.putExtra(CameraActivity.KEY_CONTENT_TYPE,CameraActivity.CONTENT_TYPE_PASSPORT);startActivityForResult(intentPassport, REQUEST_CODE_PASSPORT);break;case R.id.numbers://数字识别Intent intentNum = new Intent(MainActivity.this, CameraActivity.class);intentNum.putExtra(CameraActivity.KEY_OUTPUT_FILE_PATH,FileUtils.getSaveFile(getApplication()).getAbsolutePath());intentNum.putExtra(CameraActivity.KEY_CONTENT_TYPE,CameraActivity.CONTENT_TYPE_GENERAL);startActivityForResult(intentNum, REQUEST_CODE_NUMBERS);break;case R.id.qrcode://二维码识别Intent intentCode = new Intent(MainActivity.this, CameraActivity.class);intentCode.putExtra(CameraActivity.KEY_OUTPUT_FILE_PATH,FileUtils.getSaveFile(getApplication()).getAbsolutePath());intentCode.putExtra(CameraActivity.KEY_CONTENT_TYPE,CameraActivity.CONTENT_TYPE_GENERAL);startActivityForResult(intentCode, REQUEST_CODE_QRCODE);break;case R.id.business_card://名片识别Intent intentBusiness = new Intent(MainActivity.this, CameraActivity.class);intentBusiness.putExtra(CameraActivity.KEY_OUTPUT_FILE_PATH,FileUtils.getSaveFile(getApplication()).getAbsolutePath());intentBusiness.putExtra(CameraActivity.KEY_CONTENT_TYPE,CameraActivity.CONTENT_TYPE_GENERAL);startActivityForResult(intentBusiness, REQUEST_CODE_BUSINESSCARD);break;case R.id.handwritting://手写识别Intent intentHandwrite = new Intent(MainActivity.this, CameraActivity.class);intentHandwrite.putExtra(CameraActivity.KEY_OUTPUT_FILE_PATH,FileUtils.getSaveFile(getApplication()).getAbsolutePath());intentHandwrite.putExtra(CameraActivity.KEY_CONTENT_TYPE,CameraActivity.CONTENT_TYPE_GENERAL);startActivityForResult(intentHandwrite, REQUEST_CODE_HANDWRITING);break;case R.id.lottery://彩票识别Intent intentLottery = new Intent(MainActivity.this, CameraActivity.class);intentLottery.putExtra(CameraActivity.KEY_OUTPUT_FILE_PATH,FileUtils.getSaveFile(getApplication()).getAbsolutePath());intentLottery.putExtra(CameraActivity.KEY_CONTENT_TYPE,CameraActivity.CONTENT_TYPE_GENERAL);startActivityForResult(intentLottery, REQUEST_CODE_LOTTERY);break;case R.id.vat_invoice://增值税发票识别Intent intentVat = new Intent(MainActivity.this, CameraActivity.class);intentVat.putExtra(CameraActivity.KEY_OUTPUT_FILE_PATH,FileUtils.getSaveFile(getApplication()).getAbsolutePath());intentVat.putExtra(CameraActivity.KEY_CONTENT_TYPE,CameraActivity.CONTENT_TYPE_GENERAL);startActivityForResult(intentVat, REQUEST_CODE_VATINVOICE);break;case R.id.custom://自定义模板识别Intent intentCustom = new Intent(MainActivity.this, CameraActivity.class);intentCustom.putExtra(CameraActivity.KEY_OUTPUT_FILE_PATH,FileUtils.getSaveFile(getApplication()).getAbsolutePath());intentCustom.putExtra(CameraActivity.KEY_CONTENT_TYPE,CameraActivity.CONTENT_TYPE_GENERAL);startActivityForResult(intentCustom, REQUEST_CODE_CUSTOM);break;}
}@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {super.onActivityResult(requestCode, resultCode, data);// 识别成功回调，通用文字识别（含位置信息）if (requestCode == REQUEST_CODE_GENERAL && resultCode == Activity.RESULT_OK) {RecognizeService.recGeneral(this, FileUtils.getSaveFile(getApplicationContext()).getAbsolutePath(),new RecognizeService.ServiceListener() {@Overridepublic void onResult(String result) {alertText(result);}});}// 识别成功回调，通用文字识别（含位置信息高精度版）if (requestCode == REQUEST_CODE_ACCURATE && resultCode == Activity.RESULT_OK) {RecognizeService.recAccurate(this, FileUtils.getSaveFile(getApplicationContext()).getAbsolutePath(),new RecognizeService.ServiceListener() {@Overridepublic void onResult(String result) {alertText(result);}});}// 识别成功回调，通用文字识别if (requestCode == REQUEST_CODE_GENERAL_BASIC && resultCode == Activity.RESULT_OK) {RecognizeService.recGeneralBasic(this, FileUtils.getSaveFile(getApplicationContext()).getAbsolutePath(),new RecognizeService.ServiceListener() {@Overridepublic void onResult(String result) {alertText(result);}});}// 识别成功回调，通用文字识别（高精度版）if (requestCode == REQUEST_CODE_ACCURATE_BASIC && resultCode == Activity.RESULT_OK) {RecognizeService.recAccurateBasic(this, FileUtils.getSaveFile(getApplicationContext()).getAbsolutePath(),new RecognizeService.ServiceListener() {@Overridepublic void onResult(String result) {alertText(result);}});}// 识别成功回调，通用文字识别（含生僻字版）if (requestCode == REQUEST_CODE_GENERAL_ENHANCED && resultCode == Activity.RESULT_OK) {RecognizeService.recGeneralEnhanced(this, FileUtils.getSaveFile(getApplicationContext()).getAbsolutePath(),new RecognizeService.ServiceListener() {@Overridepublic void onResult(String result) {alertText(result);}});}// 识别成功回调，网络图片文字识别if (requestCode == REQUEST_CODE_GENERAL_WEBIMAGE && resultCode == Activity.RESULT_OK) {RecognizeService.recWebimage(this, FileUtils.getSaveFile(getApplicationContext()).getAbsolutePath(),new RecognizeService.ServiceListener() {@Overridepublic void onResult(String result) {alertText(result);}});}// 识别成功回调，银行卡识别if (requestCode == REQUEST_CODE_BANKCARD && resultCode == Activity.RESULT_OK) {RecognizeService.recBankCard(this, FileUtils.getSaveFile(getApplicationContext()).getAbsolutePath(),new RecognizeService.ServiceListener() {@Overridepublic void onResult(String result) {alertText(result);}});}// 识别成功回调，行驶证识别if (requestCode == REQUEST_CODE_VEHICLE_LICENSE && resultCode == Activity.RESULT_OK) {RecognizeService.recVehicleLicense(this, FileUtils.getSaveFile(getApplicationContext()).getAbsolutePath(),new RecognizeService.ServiceListener() {@Overridepublic void onResult(String result) {alertText(result);}});}// 识别成功回调，驾驶证识别if (requestCode == REQUEST_CODE_DRIVING_LICENSE && resultCode == Activity.RESULT_OK) {RecognizeService.recDrivingLicense(this, FileUtils.getSaveFile(getApplicationContext()).getAbsolutePath(),new RecognizeService.ServiceListener() {@Overridepublic void onResult(String result) {alertText(result);}});}// 识别成功回调，车牌识别if (requestCode == REQUEST_CODE_LICENSE_PLATE && resultCode == Activity.RESULT_OK) {RecognizeService.recLicensePlate(this, FileUtils.getSaveFile(getApplicationContext()).getAbsolutePath(),new RecognizeService.ServiceListener() {@Overridepublic void onResult(String result) {alertText(result);}});}// 识别成功回调，营业执照识别if (requestCode == REQUEST_CODE_BUSINESS_LICENSE && resultCode == Activity.RESULT_OK) {RecognizeService.recBusinessLicense(this, FileUtils.getSaveFile(getApplicationContext()).getAbsolutePath(),new RecognizeService.ServiceListener() {@Overridepublic void onResult(String result) {alertText(result);}});}// 识别成功回调，通用票据识别if (requestCode == REQUEST_CODE_RECEIPT && resultCode == Activity.RESULT_OK) {RecognizeService.recReceipt(this, FileUtils.getSaveFile(getApplicationContext()).getAbsolutePath(),new RecognizeService.ServiceListener() {@Overridepublic void onResult(String result) {alertText(result);}});}// 识别成功回调，护照if (requestCode == REQUEST_CODE_PASSPORT && resultCode == Activity.RESULT_OK) {RecognizeService.recPassport(this, FileUtils.getSaveFile(getApplicationContext()).getAbsolutePath(),new RecognizeService.ServiceListener() {@Overridepublic void onResult(String result) {alertText(result);}});}// 识别成功回调，二维码if (requestCode == REQUEST_CODE_QRCODE && resultCode == Activity.RESULT_OK) {RecognizeService.recQrcode(this, FileUtils.getSaveFile(getApplicationContext()).getAbsolutePath(),new RecognizeService.ServiceListener() {@Overridepublic void onResult(String result) {alertText(result);}});}// 识别成功回调，彩票if (requestCode == REQUEST_CODE_LOTTERY && resultCode == Activity.RESULT_OK) {RecognizeService.recLottery(this, FileUtils.getSaveFile(getApplicationContext()).getAbsolutePath(),new RecognizeService.ServiceListener() {@Overridepublic void onResult(String result) {alertText(result);}});}// 识别成功回调，增值税发票if (requestCode == REQUEST_CODE_VATINVOICE && resultCode == Activity.RESULT_OK) {RecognizeService.recVatInvoice(this, FileUtils.getSaveFile(getApplicationContext()).getAbsolutePath(),new RecognizeService.ServiceListener() {@Overridepublic void onResult(String result) {alertText(result);}});}// 识别成功回调，数字if (requestCode == REQUEST_CODE_NUMBERS && resultCode == Activity.RESULT_OK) {RecognizeService.recNumbers(this, FileUtils.getSaveFile(getApplicationContext()).getAbsolutePath(),new RecognizeService.ServiceListener() {@Overridepublic void onResult(String result) {alertText(result);}});}// 识别成功回调，手写if (requestCode == REQUEST_CODE_HANDWRITING && resultCode == Activity.RESULT_OK) {RecognizeService.recHandwriting(this, FileUtils.getSaveFile(getApplicationContext()).getAbsolutePath(),new RecognizeService.ServiceListener() {@Overridepublic void onResult(String result) {alertText(result);}});}// 识别成功回调，名片if (requestCode == REQUEST_CODE_BUSINESSCARD && resultCode == Activity.RESULT_OK) {RecognizeService.recBusinessCard(this, FileUtils.getSaveFile(getApplicationContext()).getAbsolutePath(),new RecognizeService.ServiceListener() {@Overridepublic void onResult(String result) {alertText(result);}});}// 识别成功回调，自定义模板if (requestCode == REQUEST_CODE_CUSTOM && resultCode == Activity.RESULT_OK) {RecognizeService.recCustom(this, FileUtils.getSaveFile(getApplicationContext()).getAbsolutePath(),new RecognizeService.ServiceListener() {@Overridepublic void onResult(String result) {alertText(result);}});}
}

8.释放内存资源

@Override
protected void onDestroy() {super.onDestroy();// 释放内存资源OCR.getInstance(this).release();
}

9.demo链接：https://download.csdn.net/download/qq_36692282/11709460

10百度云这次不是全部免费的，只有200次一天的免费，之后要收费的，我还以为良心了额，开源了，小失落啊

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