React_Native

import React, { useState } from 'react';
import { View, Text, Button, Image } from 'react-native';
import * as ImagePicker from 'expo-image-picker';
import * as FileSystem from 'expo-file-system';
import * as cv from 'opencv4nodejs';
import * as tf from '@tensorflow/tfjs-react-native';

const ImageForensics = () => {
  const [images, setImages] = useState([]);
  const [results, setResults] = useState([]);

  const pickImages = async () => {
    const { status } = await ImagePicker.requestMediaLibraryPermissionsAsync();
    if (status !== 'granted') {
      alert('Sorry, we need camera roll permissions to select images.');
      return;
    }

    const result = await ImagePicker.launchImageLibraryAsync({
      mediaTypes: ImagePicker.MediaTypeOptions.Images,
      allowsMultipleSelection: true,
      quality: 1,
    });

    if (!result.cancelled) {
      setImages(result.uri);
    }
  };

  const analyzeImages = async () => {
    const tempResults = [];

    for (const imageUri of images) {
      const imgBuffer = await FileSystem.readAsStringAsync(imageUri, {
        encoding: FileSystem.EncodingType.Base64,
      });

      const img = await cv.imdecode(Buffer.from(imgBuffer, 'base64'));
      const grayImg = await img.bgrToGray();
      const resizedImg = await grayImg.resize(512, 512);
      const normalizedImg = await resizedImg.divideScalar(255);

      const copyMoveFlags = detectCopyMove(normalizedImg);
      const compressionFlags = compressionArtifactsCheck(normalizedImg);

      const magnitudeSpectrum = await tf.tensor(normalizedImg.getDataAsArray()).rfft().abs().arraySync();
      const phaseSpectrum = await tf.tensor(normalizedImg.getDataAsArray()).rfft().angle().arraySync();

      const result = {
        uri: imageUri,
        copyMoveFlags: copyMoveFlags.countNonZero(),
        compressionFlags: compressionFlags.countNonZero(),
        magnitudeSpectrum,
        phaseSpectrum,
      };

      tempResults.push(result);
    }

    setResults(tempResults);
  };

  return (
    <View>
      <Button title="Select Images" onPress={pickImages} />
      <Button title="Analyze Images" onPress={analyzeImages} />

      {results.map((result, index) => (
        <View key={index}>
          <Image source={{ uri: result.uri }} style={{ width: 200, height: 200 }} />
          <Text>Copy-Move Flags: {result.copyMoveFlags}</Text>
          <Text>Compression Flags: {result.compressionFlags}</Text>
          {/* Display other results */}
        </View>
      ))}
    </View>
  );
};

// Helper functions (detectCopyMove, compressionArtifactsCheck, etc.) can be defined separately

export default ImageForensics;