HarmonyOS 鸿蒙Next 希望对CardRecognition返回的cardImageUri做人证对比

不支持uri路径直接转换成pixelMap。 这边有一个OCR的结果uri如何转换为 image.PixelMap的demo，

n可以借鉴参考一下：

import { CardRecognition, CallbackParam, CardType, CardSide } from "@kit.VisionKit";

import { image } from '@kit.ImageKit'

import fs from '@ohos.file.fs';

@Entry
@Component
struct Index {
  @State showOCR: boolean = false
  @State src?: image.PixelMap = undefined

  build() {

    Stack() {

      Column() {

        Button('click me')

          .onClick(() => {

            this.showOCR = true

          })

        Image(this.src)

      }

      if (this.showOCR) {

        this.CardOCRPage()

      }

    }

    .width('100%')

    .height('100%')

  }

  @Builder
  CardOCRPage() {

    CardRecognition({

      // 此处选择身份证类型作为示例

      supportType: CardType.CARD_ID,

      cardSide: CardSide.FRONT,

      callback: async (params: CallbackParam) => {

        this.showOCR = false

        if (params.cardInfo) {

          let imageUri = params.cardInfo['front']['cardImageUri'];

          let file = fs.openSync(imageUri, fs.OpenMode.READ_ONLY);

          console.info('file fd:' + file.fd);

          const imageSource: image.ImageSource = image.createImageSource(file.fd);

          let decodingOptions: image.DecodingOptions = {

            editable: true,

            desiredPixelFormat: 3,

          }

          this.src = await imageSource.createPixelMap(decodingOptions);

        }

      }

    })

      .width('100%')

      .height('100%')

  }
}