#鸿蒙通关秘籍#如何在HarmonyOS NEXT中实现基于Core Vision Kit的OCR功能？

在HarmonyOS NEXT中，实现OCR功能需要以下步骤：

1. 使用Core Vision Kit中的textRecognition模块进行文字识别。

   import { textRecognition } from '@kit.CoreVisionKit';
   
   export class ImageOCRUtil {
     async recognizeText(image: PixelMap | undefined, resultCallback: Function) {
       if (!image) {
         console.error('OCR', 'the image is not existed');
         return;
       }
   
       let visionInfo = {
         pixelMap: image
       };
   
       let textConfiguration = {
         isDirectionDetectionSupported: false
       };
   
       textRecognition.recognizeText(visionInfo, textConfiguration, (error, data) => {
         if (error.code == 0) {
           let recognitionRes = data.toString();
           resultCallback(recognitionRes);
         }
       });
     }
   }
   
   export default new ImageOCRUtil();
   

2. 从相册中选择图片，使用Core File Kit的picker模块获取图片URI，然后进行图片识别。

   import { picker } from '@kit.CoreFileKit';
   
   async openAlbum(): Promise<string> {
     return new Promise((resolve, reject) => {
       let photoPicker = new picker.PhotoViewPicker;
       photoPicker.select({
         MIMEType: picker.PhotoViewMIMETypes.IMAGE_TYPE,
         maxSelectNumber: 1
       }).then((res) => {
         resolve(res.photoUris[0]);
       }).catch((err) => {
         console.error('OCR', `Failed to get photo uri, code: ${err.code}, message: ${err.message}`);
         resolve('');
       })
     });
   }