以下工具类代码来自开源项目pyslam。
Timer
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import cv2 class Colors(object): ''' Colors class:reset all colors with colors.reset; two sub classes fg for foreground and bg for background; use as colors.subclass.colorname. i.e. colors.fg.red or colors.bg.greenalso, the generic bold, disable, underline, reverse, strike through, and invisible work with the main class i.e. colors.bold ''' reset='\033[0m' bold='\033[01m' disable='\033[02m' underline='\033[04m' reverse='\033[07m' strikethrough='\033[09m' invisible='\033[08m' class fg: black='\033[30m' red='\033[31m' green='\033[32m' orange='\033[33m' blue='\033[34m' purple='\033[35m' cyan='\033[36m' lightgrey='\033[37m' darkgrey='\033[90m' lightred='\033[91m' lightgreen='\033[92m' yellow='\033[93m' lightblue='\033[94m' pink='\033[95m' lightcyan='\033[96m' class bg: black='\033[40m' red='\033[41m' green='\033[42m' orange='\033[43m' blue='\033[44m' purple='\033[45m' cyan='\033[46m' lightgrey='\033[47m' class Printer(object): @staticmethod def red(*args, **kwargs): print(Colors.fg.red, *args, **kwargs) print(Colors.reset, end="") @staticmethod def green(*args, **kwargs): print(Colors.fg.green, *args, **kwargs) print(Colors.reset, end="") @staticmethod def blue(*args, **kwargs): print(Colors.fg.blue, *args, **kwargs) print(Colors.reset, end="") @staticmethod def cyan(*args, **kwargs): print(Colors.fg.cyan, *args, **kwargs) print(Colors.reset, end="") @staticmethod def orange(*args, **kwargs): print(Colors.fg.orange, *args, **kwargs) print(Colors.reset, end="") @staticmethod def purple(*args, **kwargs): print(Colors.fg.purple, *args, **kwargs) print(Colors.reset, end="") @staticmethod def yellow(*args, **kwargs): print(Colors.fg.yellow, *args, **kwargs) print(Colors.reset, end="") @staticmethod def error(*args, **kwargs): print(Colors.fg.red, *args, **kwargs, file=sys.stderr) print(Colors.reset, end="") #timer_print = print timer_print = Printer.cyan class Timer: def __init__(self, name = '', is_verbose = False): self._name = name self._is_verbose = is_verbose self._is_paused = False self._start_time = None self._accumulated = 0 self._elapsed = 0 self.start() def start(self): self._accumulated = 0 self._start_time = cv2.getTickCount() def pause(self): now_time = cv2.getTickCount() self._accumulated += (now_time - self._start_time)/cv2.getTickFrequency() self._is_paused = True def resume(self): if self._is_paused: # considered only if paused self._start_time = cv2.getTickCount() self._is_paused = False def elapsed(self): if self._is_paused: self._elapsed = self._accumulated else: now = cv2.getTickCount() self._elapsed = self._accumulated + (now - self._start_time)/cv2.getTickFrequency() if self._is_verbose is True: name = self._name if self._is_paused: name += ' [paused]' message = 'Timer::' + name + ' - elapsed: ' + str(self._elapsed) timer_print(message) return self._elapsed |
用法
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import Timertimer = Timer(is_verbose=True)timer.start() # 此处是你的代码 timer.elapsed() |
效果
TimerFps
在上面的基础上，再加上下面代码段：
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import osimport numpy as npimport cv2import math class MovingAverage: def __init__(self, average_width = 10, compute_sigma = False): self._average_width = average_width self._idx_ring = 0 self._average = 0 self._sigma2 = 0 self._is_init = False self._is_compute_sigma = compute_sigma self._one_over_average_width_min_one = 1./(average_width-1) self._ring_buffer = np.zeros(average_width) def init(self, initVal=None): if initVal is None: initVal = 0. self._ring_buffer = np.full(self._average_width, initVal, dtype=np.float32) self._average = initVal; self._sigma2 = 0; self._is_init = True; def getAverage(self, new_val=None): if not self._is_init: self.init(new_val) if new_val is None: return self._average averageOld = self._average oldVal = self._ring_buffer[self._idx_ring] self._average += (new_val - oldVal)/self._average_width if self._is_compute_sigma: self._sigma2 = self._sigma2 + self._one_over_average_width_min_one*(self._average_width*(averageOld*averageOld - self._average*self._average) - oldVal*oldVal + newVal*newVal) self._ring_buffer[self._idx_ring] = new_val self._idx_ring = (self._idx_ring + 1) % self._average_width return self._average def getSigma(self): return math.sqrt(max(self._sigma2,0.)) class TimerFps(Timer): def __init__(self, name='', average_width = 10, is_verbose = True): super().__init__(name, is_verbose) self.moving_average = MovingAverage(average_width) def refresh(self): elapsed = self.elapsed() self.moving_average.getAverage(elapsed) self.start() if self._is_verbose is True: dT = self.moving_average.getAverage() name = self._name if self._is_paused: name += ' [paused]' message = 'Timer::' + name + ' - fps: ' + str(1./dT) + ', T: ' + str(dT) timer_print(message) |
用法
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import TimerFpstimer = TimerFps(name='')timer.start() # 这里是你的代码 timer.refresh() |
效果
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原文链接：https://xfxuezhang.blog.csdn.net/article/details/122407412
