rany 发表于 2019-12-5 20:11:18

RK3399 PRO快速开发 - 人脸特征点定位

本帖最后由 rany 于 2019-12-5 20:11 编辑

简介
Rock-X SDK 是基于 RK3399Pro/RK1808 平台的一套 AI 组件库。开发者通过 Rock-X SDK提供的 API 接口能够快速构建 AI 应用。
Rock-X下载地址：https://pan.baidu.com/s/1brKNqxBYDmElm-A56DLu4Q 提取码：ji14
Rock-X SDK 主要功能
类别功能
目标检测人头检测、人车物检测
人脸人脸关键点、人脸属性分析、人脸识别
车牌车牌检测、车牌识别
人体关键点人体骨骼关键点、手指关键点



本篇是使用Rock-X SDK进行人脸特征点定位快速开发的过程，使用自定义或其它的模型的请使用rknn-toolkit和rknn-api进行开发（链接： http://wiki.t-firefly.com/zh_CN/3399pro_npu/）。

性能指标
人脸检测性能
参数性能指标
适应角度平面内人脸左右旋转±45°
侧脸左右偏转±60°
侧脸上偏转 60°
侧脸下偏转 45°
最大距离11 米(测试摄像头 FOV=60°)
mAPmAP@IOU0.5=0.857




人脸特征点定位
人脸特征点定位会获取人脸的48个关键点。
数据集误差
300w_cropped6.01%



人脸特征点定位误差计算公式如下:


euclidean(d(j) − g(j)) 表是第 j 个检测点与标注点之间的欧式距离。d 表示左外眼角和右外眼角的欧式距离。

调用过程



相关代码
以下为Android的相关代码，完整代码在/RockX_SDK_V1.1.0_20191115/demo/rk3399pro_android_demo/rockx-android-demo-face_landmark.zip。

此demo功能是从摄像头获取图像数据，检测图像中的人脸和人脸的特征点，然后在预览中画出人脸特征点。
调用Rock-X仅需三步，即可获取图像中的人脸和人脸的特征点。
详细的函数定义和相关数据结构请参考：/RockX_SDK_V1.1.0_20191115/doc/rockx_api_doc/html/index.html

1. 初始化public void create() {
    mModelPath = installRockxData(mContext);
    mRockXFaceDetectionModule = native_create_rockx_module(mModelPath, ROCKX_MODULE_FACE_DETECTION);
    mRockXFaceLandmarkModule = native_create_rockx_module(mModelPath, ROCKX_MODULE_FACE_LANDMARK_68);
}以上代码加载了Rock-X的人脸检测和人脸特征点定位模块，native_create_rockx_module()为native函数，实际调用的函数为C++代码Java_com_rockchip_gpadc_demo_rockx_RockX_native_1create_1rockx_1module(), 实现如下：
JNIEXPORT jlong JNICALL Java_com_rockchip_gpadc_demo_rockx_RockX_native_1create_1rockx_1module
      (JNIEnv *env, jobject obj, jstring modelPath, jint module)
{
    rockx_ret_t ret;

    rockx_handle_t handle;

    char *model_path = jstringToChar(env, modelPath);

    rockx_config_t rockx_configs;
    memset(&rockx_configs, 0, sizeof(rockx_config_t));

    LOGI("rockx_add_config ROCKX_CONFIG_DATA_PATH=%s\n", model_path);

    rockx_add_config(&rockx_configs, (char *)ROCKX_CONFIG_DATA_PATH, model_path);

    ret = rockx_create(&handle, (rockx_module_t)module, &rockx_configs, sizeof(rockx_config_t));
    if (ret != ROCKX_RET_SUCCESS) {
      LOGI("init rockx module %d error %d\n", module, ret);
      return ret;
    }

    return (jlong)handle;
}此函数最终调用Rock-X的API rockx_create()完成模块的创建。

2. 检测人脸


初始化模块后，通过摄像头获取数据，将图像数据传入detectFace() java函数获取图像中的人脸，detectFace()调用native函数native_face_detect()实际调用了Java_com_rockchip_gpadc_demo_rockx_RockX_native_1face_1detect()函数，最终通过Roxk-X的API rockx_face_detect()得到图像中的人脸。
Java_com_rockchip_gpadc_demo_rockx_RockX_native_1face_1detect()函数部分代码如下：

extern "C"
JNIEXPORT jint JNICALL Java_com_rockchip_gpadc_demo_rockx_RockX_native_1face_1detect
      (JNIEnv *env, jobject obj, jlong handle, jbyteArray inData, jint inWidth, jint inHeight, jint inPixelFmt,
            jobject faceList) {

          jboolean inputCopy = JNI_FALSE;
          jbyte* in_data = env->GetByteArrayElements(inData, &inputCopy);

    // initial rockx_image_t variable
    ... // 省略部分代码

    // detect face
    rockx_ret_t ret = rockx_face_detect((rockx_handle_t)handle, &input_image, &face_array, nullptr);
    ... // 省略部分代码

      return 0;
}3. 检测人脸关键点
通过人脸检测模块获取图像中的人脸后，将人脸数据传入RockX.FaceLanmark()获取人脸关键点。与人脸检测类似，RockX.FaceLanmark()调用native函数native_face_lanmark()即调用Java_com_rockchip_gpadc_demo_rockx_RockX_native_1face_1lanmark()，最终通过Rock-X API rockx_face_landmark()获取人脸的关键点。
extern "C"
JNIEXPORT jint JNICALL Java_com_rockchip_gpadc_demo_rockx_RockX_native_1face_1lanmark
      (JNIEnv *env, jobject obj, jlong handle, jbyteArray inData, jint inWidth, jint inHeight, jint inPixelFmt,
         jint boxLeft, jint boxTop, jint boxRight, jint boxBottom,
         jintArray outLandmark) {

    ... // 省略部分代码
    rockx_ret_t ret = rockx_face_landmark((rockx_handle_t)handle, &input_image, &face_box, &face_landmark);
    ... // 省略部分代码

    return 0;
}
代码测试


chhleo 发表于 2020-3-31 12:27:34

受益匪浅{:4_95:}

KingQueenWong 发表于 2020-4-28 20:29:01

学习一下{:4_91:}

龙腾四海 发表于 2020-5-15 17:31:32

不错的算法!

hahaer 发表于 2020-6-22 15:11:16

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rock319 发表于 2020-11-12 15:42:03

感谢分享！！1

lixm0501 发表于 2020-11-20 17:17:11

版主，Rock-X下载地址：https://pan.baidu.com/s/1brKNqxBYDmElm-A56DLu4Q 提取码：ji14连接已失效，请重新发布一下吧，谢谢

siasjack 发表于 2020-12-2 11:19:52

mark

15310907795 发表于 2021-6-2 17:26:14

不错
页: [1]
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