AmazonRekognitionServiceImpl.java

@Slf4j
@Service
public class AmazonRekognitionServiceImpl implements ImageRecognitionService {
    private final AwsConfig config;
    private AmazonRekognition client;

    public AmazonRekognitionServiceImpl(AwsConfig config) {
        this.config = config;
    }

    @PostConstruct
    public void init() {
        BasicAWSCredentials credentials = new BasicAWSCredentials(config.getApiKey(), config.getSecretKey());

        client = AmazonRekognitionClientBuilder
                .standard()
                .withRegion(Regions.EU_WEST_1)
                .withCredentials(new AWSStaticCredentialsProvider(credentials))
                .build();
    }

    @Override
    public String detectText(byte[] image) {
        DetectTextRequest request = new DetectTextRequest()
                .withImage(new Image()
                        .withBytes(ByteBuffer.wrap(image)));
        try {
            DetectTextResult result = client.detectText(request);
            List<TextDetection> textDetections = result.getTextDetections();

            if (textDetections.isEmpty()) {
                return null;
            }

            StringBuilder content = new StringBuilder();
            for (TextDetection text : textDetections) {
                if ("WORD".equals(text.getType())) {
                    content.append(text.getDetectedText());
                }
                log.info("Detected: " + text.getDetectedText());
                log.info("Confidence: " + text.getConfidence().toString());
                log.info("Id : " + text.getId());
                log.info("Parent Id: " + text.getParentId());
                log.info("Type: " + text.getType());
            }
            return content.toString();
        } catch (AmazonRekognitionException e) {
            log.error("Detect Text Exception :", e);
        }
        return null;
    }
}