// JAVA

final Capturer sf_capturer = service.createCapturer(service.new Config("common_capturer4_singleface.xml"));

// get original data
final RawImage original_rgb = readImage("data/depth_liveness/original_rgb.bmp", "bmp");

original_depth_ptr = readDepthMap("data/depth_liveness/original_depth.tiff"); // native function in JNI

final float zpd = 575.5f;
final float h_fov = (float) (2*Math.atan((float)original_rgb.width / 2 / zpd) / Math.PI * 180);
final float v_fov = (float) (2*Math.atan((float)original_rgb.height / 2 / zpd) / Math.PI * 180);

DepthMapRaw original_depth_map = new DepthMapRaw();
original_depth_map.depth_map_rows             = original_rgb.height;
original_depth_map.depth_map_cols             = original_rgb.width;
original_depth_map.depth_map_2_image_offset_x = 0;
original_depth_map.depth_map_2_image_offset_y = 0;
original_depth_map.depth_map_2_image_scale_x  = 1;
original_depth_map.depth_map_2_image_scale_y  = 1;
original_depth_map.horizontal_fov             = h_fov;
original_depth_map.vertical_fov               = v_fov;
original_depth_map.depth_unit_in_millimeters  = 1;
original_depth_map.depth_data_ptr             = original_depth_ptr;
original_depth_map.depth_data_stride_in_bytes = 2*original_rgb.width;

// create depth liveness estimator
final DepthLivenessEstimator dl_estimator = service.createDepthLivenessEstimator(service.new Config("depth_liveness_estimator_cnn.xml"));

DepthLivenessEstimator.Liveness original_liveness = dl_estimator.estimateLiveness(original_sample, original_depth_map);


RawImage readImage(final String filename, final String format)
{
	try {
		final File file = new File(filename);
		final BufferedImage img = ImageIO.read(file);

		assertEquals(img.getType(), BufferedImage.TYPE_3BYTE_BGR);

		final byte[] pixels = ((DataBufferByte) img.getRaster().getDataBuffer()).getData();
		return new RawImage(img.getWidth(), img.getHeight(), RawImage.Format.FORMAT_BGR, pixels);
	}
	catch (IOException e) {
		System.out.println("Error read '" + filename + "': " + e);
	}
	return null;
}

// JNI

#include <jni.h>
#include <opencv2/opencv.hpp>

extern "C"
JNIEXPORT jlong JNICALL Java_testcase_TestEstimators_readDepthMap
  (JNIEnv * env, jobject thiz, jstring jfilename)
{
    const char * buf = env->GetStringUTFChars(jfilename, NULL);
    std::string filename = buf;
    env->ReleaseStringUTFChars(jfilename, buf);

    cv::Mat depth_map = cv::imread(filename, -1);
    unsigned char * data = new unsigned char[depth_map.rows * depth_map.cols * depth_map.elemSize()];
    memcpy(data, depth_map.data, depth_map.rows * depth_map.cols * depth_map.elemSize());

    return (jlong) data;
}