66 lines
1.8 KiB
Python
66 lines
1.8 KiB
Python
import numpy as np
|
|
from typing import List
|
|
import cv2
|
|
|
|
class BackgroundHeatmap:
|
|
def __init__(self, capture):
|
|
self.heatmap = np.array([])
|
|
self.cap = capture
|
|
self.backsub = cv2.createBackgroundSubtractorMOG2()
|
|
# self.backsub = cv2.bgsegm_BackgroundSubtractorGSOC()
|
|
# self.backsub = cv2.back()
|
|
|
|
# Fill up with first frame
|
|
ret, frame = self.cap.read()
|
|
self.lastframe = self.backsub.apply(frame)
|
|
self.lastsum = self.to_floats(self.lastframe)
|
|
|
|
@staticmethod
|
|
def to_grayscale(frame):
|
|
return cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
|
|
|
|
@staticmethod
|
|
def to_floats(frame):
|
|
return cv2.normalize(frame, None, alpha=0, beta=1, norm_type=cv2.NORM_MINMAX, dtype=cv2.CV_32F)
|
|
|
|
@staticmethod
|
|
def float_to_gray(frame):
|
|
return cv2.normalize(frame, None, alpha=0, beta=255, norm_type=cv2.NORM_MINMAX, dtype=cv2.CV_8UC1)
|
|
|
|
@staticmethod
|
|
def gray_to_heat(frame):
|
|
return cv2.applyColorMap(frame, cv2.COLORMAP_JET)
|
|
|
|
def update(self):
|
|
ret, frame = self.cap.read()
|
|
self.lastframe = self.backsub.apply(frame)
|
|
self.lastsum += self.to_floats(self.lastframe)
|
|
self.heatmap = self.gray_to_heat(
|
|
self.float_to_gray(
|
|
self.to_floats(self.lastsum)
|
|
)
|
|
)
|
|
|
|
cap = cv2.VideoCapture(0)
|
|
diffsum = BackgroundHeatmap(cap)
|
|
|
|
# Load diffsum up with first
|
|
first = True
|
|
while(True):
|
|
# Update heatmap
|
|
diffsum.update()
|
|
|
|
# Display the resulting frame
|
|
cv2.imshow('Heatmap', diffsum.heatmap)
|
|
cv2.imshow('Backsub', diffsum.lastframe)
|
|
|
|
if first:
|
|
cv2.moveWindow("Backsub", 1000, 100)
|
|
first = False
|
|
|
|
if cv2.waitKey(1) & 0xFF == ord('q'):
|
|
break
|
|
|
|
# When everything done, release the capture
|
|
diffsum.cap.release()
|
|
cv2.destroyAllWindows() |