mirror of
https://github.com/opencv/opencv.git
synced 2024-12-21 05:28:01 +08:00
117 lines
3.7 KiB
Python
117 lines
3.7 KiB
Python
#!/usr/bin/env python
|
|
|
|
|
|
# Python 2/3 compatibility
|
|
from __future__ import print_function
|
|
|
|
import numpy as np
|
|
from numpy import pi, sin, cos
|
|
|
|
import cv2
|
|
|
|
defaultSize = 512
|
|
|
|
class TestSceneRender():
|
|
|
|
def __init__(self, bgImg = None, fgImg = None,
|
|
deformation = False, speed = 0.25, **params):
|
|
self.time = 0.0
|
|
self.timeStep = 1.0 / 30.0
|
|
self.foreground = fgImg
|
|
self.deformation = deformation
|
|
self.speed = speed
|
|
|
|
if bgImg is not None:
|
|
self.sceneBg = bgImg.copy()
|
|
else:
|
|
self.sceneBg = np.zeros(defaultSize, defaultSize, np.uint8)
|
|
|
|
self.w = self.sceneBg.shape[0]
|
|
self.h = self.sceneBg.shape[1]
|
|
|
|
if fgImg is not None:
|
|
self.foreground = fgImg.copy()
|
|
self.center = self.currentCenter = (int(self.w/2 - fgImg.shape[0]/2), int(self.h/2 - fgImg.shape[1]/2))
|
|
|
|
self.xAmpl = self.sceneBg.shape[0] - (self.center[0] + fgImg.shape[0])
|
|
self.yAmpl = self.sceneBg.shape[1] - (self.center[1] + fgImg.shape[1])
|
|
|
|
self.initialRect = np.array([ (self.h/2, self.w/2), (self.h/2, self.w/2 + self.w/10),
|
|
(self.h/2 + self.h/10, self.w/2 + self.w/10), (self.h/2 + self.h/10, self.w/2)]).astype(int)
|
|
self.currentRect = self.initialRect
|
|
|
|
def getXOffset(self, time):
|
|
return int( self.xAmpl*cos(time*self.speed))
|
|
|
|
|
|
def getYOffset(self, time):
|
|
return int(self.yAmpl*sin(time*self.speed))
|
|
|
|
def setInitialRect(self, rect):
|
|
self.initialRect = rect
|
|
|
|
def getRectInTime(self, time):
|
|
|
|
if self.foreground is not None:
|
|
tmp = np.array(self.center) + np.array((self.getXOffset(time), self.getYOffset(time)))
|
|
x0, y0 = tmp
|
|
x1, y1 = tmp + self.foreground.shape[0:2]
|
|
return np.array([y0, x0, y1, x1])
|
|
else:
|
|
x0, y0 = self.initialRect[0] + np.array((self.getXOffset(time), self.getYOffset(time)))
|
|
x1, y1 = self.initialRect[2] + np.array((self.getXOffset(time), self.getYOffset(time)))
|
|
return np.array([y0, x0, y1, x1])
|
|
|
|
def getCurrentRect(self):
|
|
|
|
if self.foreground is not None:
|
|
|
|
x0 = self.currentCenter[0]
|
|
y0 = self.currentCenter[1]
|
|
x1 = self.currentCenter[0] + self.foreground.shape[0]
|
|
y1 = self.currentCenter[1] + self.foreground.shape[1]
|
|
return np.array([y0, x0, y1, x1])
|
|
else:
|
|
x0, y0 = self.currentRect[0]
|
|
x1, y1 = self.currentRect[2]
|
|
return np.array([x0, y0, x1, y1])
|
|
|
|
def getNextFrame(self):
|
|
img = self.sceneBg.copy()
|
|
|
|
if self.foreground is not None:
|
|
self.currentCenter = (self.center[0] + self.getXOffset(self.time), self.center[1] + self.getYOffset(self.time))
|
|
img[self.currentCenter[0]:self.currentCenter[0]+self.foreground.shape[0],
|
|
self.currentCenter[1]:self.currentCenter[1]+self.foreground.shape[1]] = self.foreground
|
|
else:
|
|
self.currentRect = self.initialRect + np.int( 30*cos(self.time*self.speed) + 50*sin(self.time*self.speed))
|
|
if self.deformation:
|
|
self.currentRect[1:3] += self.h/20*cos(self.time)
|
|
cv2.fillConvexPoly(img, self.currentRect, (0, 0, 255))
|
|
|
|
self.time += self.timeStep
|
|
return img
|
|
|
|
def resetTime(self):
|
|
self.time = 0.0
|
|
|
|
|
|
if __name__ == '__main__':
|
|
|
|
backGr = cv2.imread('../data/graf1.png')
|
|
fgr = cv2.imread('../data/box.png')
|
|
|
|
render = TestSceneRender(backGr, fgr)
|
|
|
|
while True:
|
|
|
|
img = render.getNextFrame()
|
|
cv2.imshow('img', img)
|
|
|
|
ch = cv2.waitKey(3)
|
|
if ch == 27:
|
|
break
|
|
#import os
|
|
#print (os.environ['PYTHONPATH'])
|
|
cv2.destroyAllWindows()
|