手势区域裁剪
1.学习目的
学习摄像头的画面进行手势区域裁剪。
2.示例代码
'''
本程序遵循GPL V3协议, 请遵循协议
实验平台: DshanPI CanMV
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'''
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 aicube
import random
import gc
import sys
# 自定义手掌检测任务类
class HandDetApp(AIBase):
def __init__(self,kmodel_path,labels,model_input_size,anchors,confidence_threshold=0.2,nms_threshold=0.5,nms_option=False, strides=[8,16,32],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
self.labels=labels
# 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
self.strides = strides # 特征下采样倍数
self.nms_option = nms_option # NMS选项，如果为True做类间NMS,如果为False做类内NMS
# 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
self.ai2d=Ai2d(debug_mode)
self.ai2d.set_ai2d_dtype(nn.ai2d_format.NCHW_FMT,nn.ai2d_format.NCHW_FMT,np.uint8, np.uint8)
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参数并应用pad操作，以确保输入图像尺寸与模型输入尺寸匹配
top, bottom, left, right = self.get_padding_param()
self.ai2d.pad([0, 0, 0, 0, top, bottom, left, right], 0, [114, 114, 114])
# 使用双线性插值进行resize操作，调整图像尺寸以符合模型输入要求
self.ai2d.resize(nn.interp_method.tf_bilinear, nn.interp_mode.half_pixel)
# 构建预处理流程
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aicube库的anchorbasedet_post_process接口
def postprocess(self,results):
with ScopedTiming("postprocess",self.debug_mode > 0):
dets = aicube.anchorbasedet_post_process(results[0], results[1], results[2], self.model_input_size, self.rgb888p_size, self.strides, len(self.labels), self.confidence_threshold, self.nms_threshold, self.anchors, self.nms_option)
# 返回手掌检测结果
return dets
# 计算padding参数，确保输入图像尺寸与模型输入 尺寸匹配
def get_padding_param(self):
# 根据目标宽度和高度计算比例因子
dst_w = self.model_input_size[0]
dst_h = self.model_input_size[1]
input_width = self.rgb888p_size[0]
input_high = self.rgb888p_size[1]
ratio_w = dst_w / input_width
ratio_h = dst_h / input_high
# 选择较小的比例因子，以确保图像内容完整
if ratio_w < ratio_h:
ratio = ratio_w
else:
ratio = ratio_h
# 计算新的宽度和高度
new_w = int(ratio * input_width)
new_h = int(ratio * input_high)
# 计算宽度和高度的差值，并确定padding的位置
dw = (dst_w - new_w) / 2
dh = (dst_h - new_h) / 2
top = int(round(dh - 0.1))
bottom = int(round(dh + 0.1))
left = int(round(dw - 0.1))
right = int(round(dw + 0.1))
return top, bottom, left, right
# 自定义手势关键点分类任务类
class HandKPClassApp(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
# 检测模型输入分辨率
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]]
self.crop_params=[]
# debug模式
self.debug_mode=debug_mode
self.ai2d=Ai2d(debug_mode)
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crop和resize，Ai2d支持crop/shift/pad/resize/affine
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
self.crop_params = self.get_crop_param(det)
self.ai2d.crop(self.crop_params[0],self.crop_params[1],self.crop_params[2],self.crop_params[3])
self.ai2d.resize(nn.interp_method.tf_bilinear, nn.interp_mode.half_pixel)
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，返回手部关键点
def postprocess(self,results):
with ScopedTiming("postprocess",self.debug_mode > 0):
results=results[0].reshape(results[0].shape[0]*results[0].shape[1])
results_show = np.zeros(results.shape,dtype=np.int16)
results_show[0::2] = (results[0::2] * self.crop_params[3] + self.crop_params[0])
results_show[1::2] = (results[1::2] * self.crop_params[2] + self.crop_params[1])
return results_show
# 计算crop参数
def get_crop_param(self,det_box):
x1, y1, x2, y2 = det_box[2],det_box[3],det_box[4],det_box[5]
w,h= int(x2 - x1),int(y2 - y1)
w_det = int(float(x2 - x1) * self.display_size[0] // self.rgb888p_size[0])
h_det = int(float(y2 - y1) * self.display_size[1] // self.rgb888p_size[1])
x_det = int(x1*self.display_size[0] // self.rgb888p_size[0])
y_det = int(y1*self.display_size[1] // self.rgb888p_size[1])
length = max(w, h)/2
cx = (x1+x2)/2
cy = (y1+y2)/2
ratio_num = 1.26*length
x1_kp = int(max(0,cx-ratio_num))
y1_kp = int(max(0,cy-ratio_num))
x2_kp = int(min(self.rgb888p_size[0]-1, cx+ratio_num))
y2_kp = int(min(self.rgb888p_size[1]-1, cy+ratio_num))
w_kp = int(x2_kp - x1_kp + 1)
h_kp = int(y2_kp - y1_kp + 1)
return [x1_kp, y1_kp, w_kp, h_kp]
class SpaceResize:
def __init__(self,hand_det_kmodel,hand_kp_kmodel,det_input_size,kp_input_size,labels,anchors,confidence_threshold=0.25,nms_threshold=0.3,nms_option=False,strides=[8,16,32],rgb888p_size=[1280,720],display_size=[1920,1080],debug_mode=0):
# 手掌检测模型路径
self.hand_det_kmodel=hand_det_kmodel
# 手掌关键点模型路径
self.hand_kp_kmodel=hand_kp_kmodel
# 手掌检测模型输入分辨率
self.det_input_size=det_input_size
# 手掌关键点模型输入分辨率
self.kp_input_size=kp_input_size
self.labels=labels
# anchors
self.anchors=anchors
# 置信度阈值
self.confidence_threshold=confidence_threshold
# nms阈值
self.nms_threshold=nms_threshold
self.nms_option=nms_option
self.strides=strides
# 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.first_start = True # 首次手掌入镜参数
self.two_point_left_x = 0 # 中指食指包括范围 x
self.two_point_top_y = 0 # 中指食指包括范围 y
self.two_point_mean_w = 0 # 中指食指首次入镜包括范围 w
self.two_point_mean_h = 0 # 中指食指首次入镜包括范围 h
self.two_point_crop_w = 0 # 中指食指包括范围 w
self.two_point_crop_h = 0 # 中指食指包括范围 h
self.osd_plot_x = 0 # osd 画缩放图起始点 x
self.osd_plot_y = 0 # osd 画缩放图起始点 y
self.ori_new_ratio = 0 # 缩放比例
self.new_resize_w = 0 # 缩放后 w
self.new_resize_h = 0 # 缩放后 h
self.crop_area = 0 # 剪切区域
self.rect_frame_x = 0 # osd绘画起始点 x
self.rect_frame_y = 0 # osd绘画起始点 y
self.masks = np.zeros((self.display_size[1],self.display_size[0],4),dtype=np.uint8)
self.mask_img=image.Image(self.display_size[0], self.display_size[1], image.ARGB8888,alloc=image.ALLOC_REF,data=self.masks)
self.hand_det=HandDetApp(self.hand_det_kmodel,self.labels,model_input_size=self.det_input_size,anchors=self.anchors,confidence_threshold=self.confidence_threshold,nms_threshold=self.nms_threshold,nms_option=self.nms_option,strides=self.strides,rgb888p_size=self.rgb888p_size,display_size=self.display_size,debug_mode=0)
self.hand_kp=HandKPClassApp(self.hand_kp_kmodel,model_input_size=self.kp_input_size,rgb888p_size=self.rgb888p_size,display_size=self.display_size)
self.ai2d=Ai2d(debug_mode)
self.ai2d.set_ai2d_dtype(nn.ai2d_format.NCHW_FMT,nn.ai2d_format.RGB_packed,np.uint8, np.uint8)
self.hand_det.config_preprocess()
# 对输入数据做预处理，对拇指和中指部分做裁剪并做resize
def imgprocess(self,input_np,x,y,w,h,out_w,out_h):
self.ai2d.crop(x, y, w, h)
self.ai2d.resize(nn.interp_method.tf_bilinear, nn.interp_mode.half_pixel )
self.ai2d.build([1,3,self.rgb888p_size[1],self.rgb888p_size[0]],[1,out_h, out_w,3])
return self.ai2d.run(input_np).to_numpy()
# run函数
def run(self,input_np):
# 先进行手掌检测
det_boxes=self.hand_det.run(input_np)
det_res=[]
two_point = np.zeros((4),dtype=np.int16)
for det_box in det_boxes:
# 筛选符合要求的手掌
x1, y1, x2, y2 = det_box[2],det_box[3],det_box[4],det_box[5]
w,h= int(x2 - x1),int(y2 - y1)
if (h<(0.1*self.rgb888p_size[1])):
continue
if (w<(0.25*self.rgb888p_size[0]) and ((x1<(0.03*self.rgb888p_size[0])) or (x2>(0.97*self.rgb888p_size[0])))):
continue
if (w<(0.15*self.rgb888p_size[0]) and ((x1<(0.01*self.rgb888p_size[0])) or (x2>(0.99*self.rgb888p_size[0])))):
continue
det_res.append(det_box)
if len(det_res)!=0:
# 选择第一个手掌做手掌关键点识别，然后裁剪拇指和中指区域做resize并替换原图中的部分
det_box=det_res[0]
self.hand_kp.config_preprocess(det_box)
results_show=self.hand_kp.run(input_np)
two_point[0],two_point[1],two_point[2],two_point[3] = results_show[8],results_show[9],results_show[16+8],results_show[16+9]
if (self.first_start):
if (two_point[0] > 0 and two_point[0] < self.rgb888p_size[0] and two_point[2] > 0 and two_point[2] < self.rgb888p_size[0] and two_point[1] > 0 and two_point[1] < self.rgb888p_size[1] and two_point[3] > 0 and two_point[3] < self.rgb888p_size[1]):
self.two_point_mean_w = np.sqrt(pow(two_point[0] - two_point[2],2) + pow(two_point[1] - two_point[3],2))*0.8
self.two_point_mean_h = np.sqrt(pow(two_point[0] - two_point[2],2) + pow(two_point[1] - two_point[3],2))*0.8
self.first_start = False
else:
self.mask_img.clear()
self.two_point_left_x = int(max((two_point[0] + two_point[2]) / 2 - self.two_point_mean_w / 2, 0))
self.two_point_top_y = int(max((two_point[1] + two_point[3]) / 2 - self.two_point_mean_h / 2, 0))
self.two_point_crop_w = int(min(min((two_point[0] + two_point[2]) / 2 - self.two_point_mean_w / 2 + self.two_point_mean_w , self.two_point_mean_w), self.rgb888p_size[0] - ((two_point[0] + two_point[2]) / 2 - self.two_point_mean_w / 2)))
self.two_point_crop_h = int(min(min((two_point[1] + two_point[3]) / 2 - self.two_point_mean_h / 2 + self.two_point_mean_h , self.two_point_mean_h), self.rgb888p_size[1] - ((two_point[1] + two_point[3]) / 2 - self.two_point_mean_h / 2)))
self.ori_new_ratio = np.sqrt(pow((two_point[0] - two_point[2]),2) + pow((two_point[1] - two_point[3]),2))*0.8 / self.two_point_mean_w
self.new_resize_w = min(int(self.two_point_crop_w * self.ori_new_ratio / self.rgb888p_size[0] * self.display_size[0]),600)
self.new_resize_h = min(int(self.two_point_crop_h * self.ori_new_ratio / self.rgb888p_size[1] * self.display_size[1]),600)
self.rect_frame_x = int(self.two_point_left_x * 1.0 / self.rgb888p_size[0] * self.display_size[0])
self.rect_frame_y = int(self.two_point_top_y * 1.0 / self.rgb888p_size[1] * self.display_size[1])
self.draw_w = min(self.new_resize_w,self.display_size[0]-self.rect_frame_x-1)
self.draw_h = min(self.new_resize_h,self.display_size[1]-self.rect_frame_y-1)
space_np_out = self.imgprocess(input_np, self.two_point_left_x, self.two_point_top_y, self.two_point_crop_w, self.two_point_crop_h, self.new_resize_w, self.new_resize_h) # 运行 隔空缩放检测 ai2d
self.masks[self.rect_frame_y:self.rect_frame_y + self.draw_h,self.rect_frame_x:self.rect_frame_x + self.draw_w,0] = 255
self.masks[self.rect_frame_y:self.rect_frame_y + self.draw_h,self.rect_frame_x:self.rect_frame_x + self.draw_w,1:4] = space_np_out[0][0:self.draw_h,0:self.draw_w,:]
return det_res
# 绘制效果
def draw_result(self,pl,det_res):
pl.osd_img.clear()
if len(det_res)==1:
pl.osd_img.copy_from(self.mask_img)
else:
pl.osd_img.draw_string_advanced((self.display_size[0]//2),(self.display_size[1]//2),32,"请保证一只手入镜!",color=(255,0,0))
if __name__=="__main__":
# 显示模式，默认"hdmi",可以选择"hdmi"和"lcd"
display_mode="lcd"
# k230保持不变，k230d可调整为[640,360]
rgb888p_size = [1920, 1080]
if display_mode=="hdmi":
display_size=[1920,1080]
else:
display_size=[800,480]
# 手掌检测模型路径
hand_det_kmodel_path="/sdcard/examples/kmodel/hand_det.kmodel"
# 手掌关键点模型路径
hand_kp_kmodel_path="/sdcard/examples/kmodel/handkp_det.kmodel"
anchors_path="/sdcard/examples/utils/prior_data_320.bin"
hand_det_input_size=[512,512]
hand_kp_input_size=[256,256]
confidence_threshold=0.2
nms_threshold=0.5
labels=["hand"]
anchors = [26,27, 53,52, 75,71, 80,99, 106,82, 99,134, 140,113, 161,172, 245,276]
# 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()
sr=SpaceResize(hand_det_kmodel_path,hand_kp_kmodel_path,det_input_size=hand_det_input_size,kp_input_size=hand_kp_input_size,labels=labels,anchors=anchors,confidence_threshold=confidence_threshold,nms_threshold=nms_threshold,nms_option=False,strides=[8,16,32],rgb888p_size=rgb888p_size,display_size=display_size)
try:
while True:
os.exitpoint()
with ScopedTiming("total",1):
img=pl.get_frame() # 获取当前帧
det_res=sr.run(img) # 推理当前帧
sr.draw_result(pl,det_res) # 绘制当前帧推理结果
pl.show_image() # 展示当前帧
gc.collect()
except Exception as e:
sys.print_exception(e)
finally:
sr.hand_det.deinit()
sr.hand_kp.deinit()
pl.destroy()
3.实验结果
点击运行代码后可以查看手势区域裁剪结果：
