CodeIgniter助手函数可以使用数据库函数吗？(Can CodeIgniter Helper Functions use database functions?)

 最新的SVN版本的OpenCV包含基于HOG的行人检测（无证）实现。 它甚至配备了一个预先训练好的探测器和一个python包装器。 基本用法如下： 
 
from cv import *

storage = CreateMemStorage(0)
img = LoadImage(file)  # or read from camera

found = list(HOGDetectMultiScale(img, storage, win_stride=(8,8),
                padding=(32,32), scale=1.05, group_threshold=2))
 
 因此，不用跟踪，您可以在每个帧中运行检测器并直接使用其输出。 
 
 有关实现的信息，请参阅src/cvaux/cvhog.cpp ;有关更完整的python示例（均在OpenCV源代码中），请参阅samples/python/peopledetect.py 。 

The latest SVN version of OpenCV contains an (undocumented) implementation of HOG-based pedestrian detection. It even comes with a pre-trained detector and a python wrapper. The basic usage is as follows:
 
from cv import *

storage = CreateMemStorage(0)
img = LoadImage(file)  # or read from camera

found = list(HOGDetectMultiScale(img, storage, win_stride=(8,8),
                padding=(32,32), scale=1.05, group_threshold=2))
 
So instead of tracking, you might just run the detector in each frame and use its output directly.
 
See src/cvaux/cvhog.cpp for the implementation and samples/python/peopledetect.py for a more complete python example (both in the OpenCV sources).