@hmscore/react-native-hms-mlimage/example/src/HmsImageRelatedServices/LandmarkRecognition.js

React Native HMS ML Image Kit

/*
 * Copyright 2023-2024. Huawei Technologies Co., Ltd. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License")
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import React from 'react';
import {
  Text,
  View,
  ScrollView,
  TextInput,
  TouchableOpacity,
  Image,
  ToastAndroid
} from 'react-native';
import { styles } from '../Styles';
import { HMSLandmarkRecognition, HMSApplication } from '@hmscore/react-native-hms-mlimage';
import { showImagePicker } from '../HmsOtherServices/Helper';

export default class LandmarkRecognition extends React.Component {

  componentDidMount() { }

  componentWillUnmount() { }

  constructor(props) {
    super(props);
    this.state = {
      imageUri: '',
      landmark: [],
      coordinates: [],
      possibility: []
    };
  }

  getLandmarkAnalyzerSetting = () => {
    return { largestNumOfReturns: 10, patternType: HMSLandmarkRecognition.STEADY_PATTERN };
  }

  getFrameConfiguration = () => {
    return { filePath: this.state.imageUri };
  }

  async asyncAnalyzeFrame() {
    try {
      var result = await HMSLandmarkRecognition.asyncAnalyzeFrame(true, this.getFrameConfiguration(), this.getLandmarkAnalyzerSetting());
      console.log(result);
      if (result.status == HMSApplication.SUCCESS) {
        result.result.forEach(element => {
          this.state.landmark.push(element.landMark);
          this.state.possibility.push(element.possibility);
          long = [];
          lat = [];
          element.coordinates.forEach(ll => {
            long.push(ll.longitude);
            lat.push(ll.latitude);
          })
          this.state.coordinates.push(lat, long);
        });
        this.setState({
          landMark: this.state.landmark,
          possibility: this.state.possibility,
          coordinates: this.state.coordinates,
        });
      }
      else {
        ToastAndroid.showWithGravity(result.message, ToastAndroid.SHORT, ToastAndroid.CENTER);
      }
    } catch (e) {
      console.error(e);
    }
  }

  startAnalyze() {
    this.setState({
      landmark: [],
      possibility: [],
      coordinates: [],
    })
    this.asyncAnalyzeFrame();
  }

  render() {
    return (
      <ScrollView style={styles.bg}>

        <View style={styles.containerCenter}>
          <TouchableOpacity onPress={() => { showImagePicker().then((result) => this.setState({ imageUri: result })) }}
            style={styles.startButton}>
            <Text style={styles.startButtonLabel}>Select Image</Text>
          </TouchableOpacity>
          {this.state.imageUri !== '' &&
            <Image
              style={styles.imageSelectView}
              source={{ uri: this.state.imageUri }}
            />
          }
        </View>
        <TextInput
          style={styles.customInput}
          value={this.state.landmark.toString()}
          placeholder="landmarks"
          multiline={true}
          editable={false}
        />
        <TextInput
          style={styles.customInput}
          value={this.state.coordinates.toString()}
          placeholder="coordinates"
          multiline={true}
          editable={false}
        />

        <TextInput
          style={styles.customInput}
          value={this.state.possibility.toString()}
          placeholder="possibility"
          multiline={true}
          editable={false}
        />

        <View style={styles.basicButton}>
          <TouchableOpacity
            style={styles.startButton}
            onPress={this.startAnalyze.bind(this)}
            disabled={this.state.imageUri == '' ? true : false} >
            <Text style={styles.startButtonLabel}> Start Analyze </Text>
          </TouchableOpacity>
        </View>
      </ScrollView>
    );
  }
}