AWS Rekognition Adding Faces to Collection

I am trying to use the AWS Rekognition Service ( Java SDK ) & adding faces to an existing collection. But I am getting following issue

Error :"Request has invalid image format (Service: Rekognition, Status Code: 400, Request ID: 4adc5ed9-3484-420a-bb78-34aebe6d8bbb)"

As per the documentation from the below URL for Java, no need to do base64 for images.

https://docs.aws.amazon.com/rekognition/latest/dg/images-information.html

I am not sure what I am missing here. Can anyone assist here?

---

public class AddFacesToCollection { public static final String collectionId = "vowCollection"; public static final String bucket = "vowvideo"; public static final String photo = "sachin.jpeg";

static LoggerContext loggerContext = (LoggerContext) LoggerFactory.getILoggerFactory();

static {

	loggerContext.getLogger("org.apache.http").setLevel(Level.INFO);
	loggerContext.getLogger("com.amazonaws").setLevel(Level.INFO);
}

public static void main(String[] args) throws Exception {

	  AmazonRekognition rekognitionClient = AmazonRekognitionClientBuilder.defaultClient();

        Image image = new Image()
                .withS3Object(new S3Object()
                .withBucket(bucket)
                .withName(photo));
        
        IndexFacesRequest indexFacesRequest = new IndexFacesRequest()
                .withImage(image)
                .withQualityFilter(QualityFilter.AUTO)
                .withMaxFaces(1)
                .withCollectionId(collectionId)
                .withExternalImageId(photo)
                .withDetectionAttributes("DEFAULT");

	IndexFacesResult indexFacesResult = rekognitionClient.indexFaces(indexFacesRequest);

	System.out.println("Results for " + photo);
	System.out.println("Faces indexed:");
	List<FaceRecord> faceRecords = indexFacesResult.getFaceRecords();
	for (FaceRecord faceRecord : faceRecords) {
		System.out.println("  Face ID: " + faceRecord.getFace().getFaceId());
		System.out.println("  Location:" + faceRecord.getFaceDetail().getBoundingBox().toString());
	}

	List<UnindexedFace> unindexedFaces = indexFacesResult.getUnindexedFaces();
	System.out.println("Faces not indexed:");
	for (UnindexedFace unindexedFace : unindexedFaces) {
		System.out.println("  Location:" + unindexedFace.getFaceDetail().getBoundingBox().toString());
		System.out.println("  Reasons:");
		for (String reason : unindexedFace.getReasons()) {
			System.out.println("   " + reason);
		}
	}
}

-Snehadeep.