【CanMV K230 AI视觉】人脸姿态(脸部朝向)
- 人脸姿态(脸部朝向)
(动态测试效果可以去下面网站自己看。)
B站视频链接:已做成合集
抖音链接:已做成合集
人脸姿态(脸部朝向)
人脸姿态是在检测到人脸后通过3D矩形框描绘出脸部朝向,支持单个和多个人脸。
'''
实验名称:人脸姿态(脸部朝向)
实验平台:01Studio CanMV K230
教程:wiki.01studio.cc
'''
from libs.PipeLine import PipeLine, ScopedTiming
from libs.AIBase import AIBase
from libs.AI2D import Ai2d
import os
import ujson
from media.media import *
from time import *
import nncase_runtime as nn
import ulab.numpy as np
import time
import image
import aidemo
import random
import gc
import sys
# 自定义人脸检测任务类
class FaceDetApp(AIBase):
def __init__(self,kmodel_path,model_input_size,anchors,confidence_threshold=0.25,nms_threshold=0.3,rgb888p_size=[1280,720],display_size=[1920,1080],debug_mode=0):
super().__init__(kmodel_path,model_input_size,rgb888p_size,debug_mode)
# kmodel路径
self.kmodel_path=kmodel_path
# 检测模型输入分辨率
self.model_input_size=model_input_size
# 置信度阈值
self.confidence_threshold=confidence_threshold
# nms阈值
self.nms_threshold=nms_threshold
self.anchors=anchors
# sensor给到AI的图像分辨率,宽16字节对齐
self.rgb888p_size=[ALIGN_UP(rgb888p_size[0],16),rgb888p_size[1]]
# 视频输出VO分辨率,宽16字节对齐
self.display_size=[ALIGN_UP(display_size[0],16),display_size[1]]
# debug模式
self.debug_mode=debug_mode
# 实例化Ai2d,用于实现模型预处理
self.ai2d=Ai2d(debug_mode)
# 设置Ai2d的输入输出格式和类型
self.ai2d.set_ai2d_dtype(nn.ai2d_format.NCHW_FMT,nn.ai2d_format.NCHW_FMT,np.uint8, np.uint8)
# 配置预处理操作,这里使用了pad和resize,Ai2d支持crop/shift/pad/resize/affine,具体代码请打开/sdcard/app/libs/AI2D.py查看
def config_preprocess(self,input_image_size=None):
with ScopedTiming("set preprocess config",self.debug_mode > 0):
# 初始化ai2d预处理配置,默认为sensor给到AI的尺寸,可以通过设置input_image_size自行修改输入尺寸
ai2d_input_size=input_image_size if input_image_size else self.rgb888p_size
# 计算padding参数,并设置padding预处理
self.ai2d.pad(self.get_pad_param(), 0, [104,117,123])
# 设置resize预处理
self.ai2d.resize(nn.interp_method.tf_bilinear, nn.interp_mode.half_pixel)
# 构建预处理流程,参数为预处理输入tensor的shape和预处理输出的tensor的shape
self.ai2d.build([1,3,ai2d_input_size[1],ai2d_input_size[0]],[1,3,self.model_input_size[1],self.model_input_size[0]])
# 自定义后处理,results是模型输出的array列表,这里使用了aidemo库的face_det_post_process接口
def postprocess(self,results):
with ScopedTiming("postprocess",self.debug_mode > 0):
res = aidemo.face_det_post_process(self.confidence_threshold,self.nms_threshold,self.model_input_size[0],self.anchors,self.rgb888p_size,results)
if len(res)==0:
return res
else:
return res[0]
# 计算padding参数
def get_pad_param(self):
dst_w = self.model_input_size[0]
dst_h = self.model_input_size[1]
# 计算最小的缩放比例,等比例缩放
ratio_w = dst_w / self.rgb888p_size[0]
ratio_h = dst_h / self.rgb888p_size[1]
if ratio_w < ratio_h:
ratio = ratio_w
else:
ratio = ratio_h
new_w = (int)(ratio * self.rgb888p_size[0])
new_h = (int)(ratio * self.rgb888p_size[1])
dw = (dst_w - new_w) / 2
dh = (dst_h - new_h) / 2
top = (int)(round(0))
bottom = (int)(round(dh * 2 + 0.1))
left = (int)(round(0))
right = (int)(round(dw * 2 - 0.1))
return [0,0,0,0,top, bottom, left, right]
# 自定义人脸姿态任务类
class FacePoseApp(AIBase):
def __init__(self,kmodel_path,model_input_size,rgb888p_size=[1920,1080],display_size=[1920,1080],debug_mode=0):
super().__init__(kmodel_path,model_input_size,rgb888p_size,debug_mode)
# kmodel路径
self.kmodel_path=kmodel_path
# 人脸姿态模型输入分辨率
self.model_input_size=model_input_size
# sensor给到AI的图像分辨率,宽16字节对齐
self.rgb888p_size=[ALIGN_UP(rgb888p_size[0],16),rgb888p_size[1]]
# 视频输出VO分辨率,宽16字节对齐
self.display_size=[ALIGN_UP(display_size[0],16),display_size[1]]
# debug模式
self.debug_mode=debug_mode
# 实例化Ai2d,用于实现模型预处理
self.ai2d=Ai2d(debug_mode)
# 设置Ai2d的输入输出格式和类型
self.ai2d.set_ai2d_dtype(nn.ai2d_format.NCHW_FMT,nn.ai2d_format.NCHW_FMT,np.uint8, np.uint8)
# 配置预处理操作,这里使用了affine,Ai2d支持crop/shift/pad/resize/affine,具体代码请打开/sdcard/app/libs/AI2D.py查看
def config_preprocess(self,det,input_image_size=None):
with ScopedTiming("set preprocess config",self.debug_mode > 0):
# 初始化ai2d预处理配置,默认为sensor给到AI的尺寸,可以通过设置input_image_size自行修改输入尺寸
ai2d_input_size=input_image_size if input_image_size else self.rgb888p_size
# 计算affine矩阵并设置affine预处理
matrix_dst = self.get_affine_matrix(det)
self.ai2d.affine(nn.interp_method.cv2_bilinear,0, 0, 127, 1,matrix_dst)
# 构建预处理流程,参数为预处理输入tensor的shape和预处理输出的tensor的shape
self.ai2d.build([1,3,ai2d_input_size[1],ai2d_input_size[0]],[1,3,self.model_input_size[1],self.model_input_size[0]])
# 自定义后处理,results是模型输出的array列表,计算欧拉角
def postprocess(self,results):
with ScopedTiming("postprocess",self.debug_mode > 0):
R,eular = self.get_euler(results[0][0])
return R,eular
def get_affine_matrix(self,bbox):
# 获取仿射矩阵,用于将边界框映射到模型输入空间
with ScopedTiming("get_affine_matrix", self.debug_mode > 1):
# 设置缩放因子
factor = 2.7
# 从边界框提取坐标和尺寸
x1, y1, w, h = map(lambda x: int(round(x, 0)), bbox[:4])
# 模型输入大小
edge_size = self.model_input_size[1]
# 平移距离,使得模型输入空间的中心对准原点
trans_distance = edge_size / 2.0
# 计算边界框中心点的坐标
center_x = x1 + w / 2.0
center_y = y1 + h / 2.0
# 计算最大边长
maximum_edge = factor * (h if h > w else w)
# 计算缩放比例
scale = edge_size * 2.0 / maximum_edge
# 计算平移参数
cx = trans_distance - scale * center_x
cy = trans_distance - scale * center_y
# 创建仿射矩阵
affine_matrix = [scale, 0, cx, 0, scale, cy]
return affine_matrix
def rotation_matrix_to_euler_angles(self,R):
# 将旋转矩阵(3x3 矩阵)转换为欧拉角(pitch、yaw、roll)
# 计算 sin(yaw)
sy = np.sqrt(R[0, 0] ** 2 + R[1, 0] ** 2)
if sy < 1e-6:
# 若 sin(yaw) 过小,说明 pitch 接近 ±90 度
pitch = np.arctan2(-R[1, 2], R[1, 1]) * 180 / np.pi
yaw = np.arctan2(-R[2, 0], sy) * 180 / np.pi
roll = 0
else:
# 计算 pitch、yaw、roll 的角度
pitch = np.arctan2(R[2, 1], R[2, 2]) * 180 / np.pi
yaw = np.arctan2(-R[2, 0], sy) * 180 / np.pi
roll = np.arctan2(R[1, 0], R[0, 0]) * 180 / np.pi
return [pitch,yaw,roll]
def get_euler(self,data):
# 获取旋转矩阵和欧拉角
R = data[:3, :3].copy()
eular = self.rotation_matrix_to_euler_angles(R)
return R,eular
# 人脸姿态任务类
class FacePose:
def __init__(self,face_det_kmodel,face_pose_kmodel,det_input_size,pose_input_size,anchors,confidence_threshold=0.25,nms_threshold=0.3,rgb888p_size=[1280,720],display_size=[1920,1080],debug_mode=0):
# 人脸检测模型路径
self.face_det_kmodel=face_det_kmodel
# 人脸姿态模型路径
self.face_pose_kmodel=face_pose_kmodel
# 人脸检测模型输入分辨率
self.det_input_size=det_input_size
# 人脸姿态模型输入分辨率
self.pose_input_size=pose_input_size
# anchors
self.anchors=anchors
# 置信度阈值
self.confidence_threshold=confidence_threshold
# nms阈值
self.nms_threshold=nms_threshold
# sensor给到AI的图像分辨率,宽16字节对齐
self.rgb888p_size=[ALIGN_UP(rgb888p_size[0],16),rgb888p_size[1]]
# 视频输出VO分辨率,宽16字节对齐
self.display_size=[ALIGN_UP(display_size[0],16),display_size[1]]
# debug_mode模式
self.debug_mode=debug_mode
self.face_det=FaceDetApp(self.face_det_kmodel,model_input_size=self.det_input_size,anchors=self.anchors,confidence_threshold=self.confidence_threshold,nms_threshold=self.nms_threshold,rgb888p_size=self.rgb888p_size,display_size=self.display_size,debug_mode=0)
self.face_pose=FacePoseApp(self.face_pose_kmodel,model_input_size=self.pose_input_size,rgb888p_size=self.rgb888p_size,display_size=self.display_size)
self.face_det.config_preprocess()
# run函数
def run(self,input_np):
# 人脸检测
det_boxes=self.face_det.run(input_np)
pose_res=[]
for det_box in det_boxes:
# 对检测到的每一个人脸做人脸姿态估计
self.face_pose.config_preprocess(det_box)
R,eular=self.face_pose.run(input_np)
pose_res.append((R,eular))
return det_boxes,pose_res
# 绘制人脸姿态角效果
def draw_result(self,pl,dets,pose_res):
pl.osd_img.clear()
if dets:
draw_img_np = np.zeros((self.display_size[1],self.display_size[0],4),dtype=np.uint8)
draw_img=image.Image(self.display_size[0], self.display_size[1], image.ARGB8888,alloc=image.ALLOC_REF,data=draw_img_np)
line_color = np.array([255, 0, 0 ,255],dtype=np.uint8) #bgra
for i,det in enumerate(dets):
# (1)获取人脸姿态矩阵和欧拉角
projections,center_point = self.build_projection_matrix(det)
R,euler = pose_res[i]
# (2)遍历人脸投影矩阵的关键点,进行投影,并将结果画在图像上
first_points = []
second_points = []
for pp in range(8):
sum_x, sum_y = 0.0, 0.0
for cc in range(3):
sum_x += projections[pp][cc] * R[cc][0]
sum_y += projections[pp][cc] * (-R[cc][1])
center_x,center_y = center_point[0],center_point[1]
x = (sum_x + center_x) / self.rgb888p_size[0] * self.display_size[0]
y = (sum_y + center_y) / self.rgb888p_size[1] * self.display_size[1]
x = max(0, min(x, self.display_size[0]))
y = max(0, min(y, self.display_size[1]))
if pp < 4:
first_points.append((x, y))
else:
second_points.append((x, y))
first_points = np.array(first_points,dtype=np.float)
aidemo.polylines(draw_img_np,first_points,True,line_color,2,8,0)
second_points = np.array(second_points,dtype=np.float)
aidemo.polylines(draw_img_np,second_points,True,line_color,2,8,0)
for ll in range(4):
x0, y0 = int(first_points[ll][0]),int(first_points[ll][1])
x1, y1 = int(second_points[ll][0]),int(second_points[ll][1])
draw_img.draw_line(x0, y0, x1, y1, color = (255, 0, 0 ,255), thickness = 2)
pl.osd_img.copy_from(draw_img)
def build_projection_matrix(self,det):
x1, y1, w, h = map(lambda x: int(round(x, 0)), det[:4])
# 计算边界框中心坐标
center_x = x1 + w / 2.0
center_y = y1 + h / 2.0
# 定义后部(rear)和前部(front)的尺寸和深度
rear_width = 0.5 * w
rear_height = 0.5 * h
rear_depth = 0
factor = np.sqrt(2.0)
front_width = factor * rear_width
front_height = factor * rear_height
front_depth = factor * rear_width # 使用宽度来计算深度,也可以使用高度,取决于需求
# 定义立方体的顶点坐标
temp = [
[-rear_width, -rear_height, rear_depth],
[-rear_width, rear_height, rear_depth],
[rear_width, rear_height, rear_depth],
[rear_width, -rear_height, rear_depth],
[-front_width, -front_height, front_depth],
[-front_width, front_height, front_depth],
[front_width, front_height, front_depth],
[front_width, -front_height, front_depth]
]
projections = np.array(temp)
# 返回投影矩阵和中心坐标
return projections, (center_x, center_y)
if __name__=="__main__":
# 显示模式,默认"hdmi",可以选择"hdmi"和"lcd"
display_mode="lcd"
if display_mode=="hdmi":
display_size=[1920,1080]
else:
display_size=[800,480]
# 人脸检测模型路径
face_det_kmodel_path="/sdcard/app/tests/kmodel/face_detection_320.kmodel"
# 人脸姿态模型路径
face_pose_kmodel_path="/sdcard/app/tests/kmodel/face_pose.kmodel"
# 其它参数
anchors_path="/sdcard/app/tests/utils/prior_data_320.bin"
rgb888p_size=[1920,1080]
face_det_input_size=[320,320]
face_pose_input_size=[120,120]
confidence_threshold=0.5
nms_threshold=0.2
anchor_len=4200
det_dim=4
anchors = np.fromfile(anchors_path, dtype=np.float)
anchors = anchors.reshape((anchor_len,det_dim))
# 初始化PipeLine,只关注传给AI的图像分辨率,显示的分辨率
pl=PipeLine(rgb888p_size=rgb888p_size,display_size=display_size,display_mode=display_mode)
pl.create()
fp=FacePose(face_det_kmodel_path,face_pose_kmodel_path,det_input_size=face_det_input_size,pose_input_size=face_pose_input_size,anchors=anchors,confidence_threshold=confidence_threshold,nms_threshold=nms_threshold,rgb888p_size=rgb888p_size,display_size=display_size)
clock = time.clock()
try:
while True:
os.exitpoint()
clock.tick()
img=pl.get_frame() # 获取当前帧
det_boxes,pose_res=fp.run(img) # 推理当前帧
print(det_boxes,pose_res) # 打印结果
fp.draw_result(pl,det_boxes,pose_res) # 绘制推理效果
pl.show_image() # 展示推理效果
gc.collect()
print(clock.fps()) #打印帧率
except Exception as e:
sys.print_exception(e)
finally:
fp.face_det.deinit()
fp.face_pose.deinit()
pl.destroy()
主代码变量 | 说明 |
---|---|
det_boxes | 人脸检测结果 |
pose_res | 姿态3D矩形 |