HarmonyOS OCR能力范围

import { CardRecognition, CallbackParam, CardType } from "@kit.VisionKit"; 
 
@Entry 
@Component 
struct VisionKitPage { 
  @State imageUri: string | undefined = '' 
 
  build() { 
    Column() { 
      Image(this.imageUri) 
        .width(100).height(80) 
 
      CardRecognition({ 
        // 此处选择身份证类型作为示例 
        supportType: CardType.CARD_ID, 
        cardSide: 1, 
        callback: ((params: CallbackParam) => { 
          console.info(`------>params code: ${params.code}`) 
          console.info(`------>params cardType: ${params.cardType}`) 
          console.info(`------>params cardInfo back: ${JSON.stringify(params.cardInfo)}`) 
          let backinfo: Record<string, string> | undefined = params.cardInfo?.back 
          this.imageUri = backinfo?.cardImageUri 
        }) 
      }) 
    } 
    .width('100%') 
    .height('100%') 
    .justifyContent(FlexAlign.Center) 
  } 
}