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104 lines
2.9 KiB
Python
104 lines
2.9 KiB
Python
import numpy as np
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import cv2
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from time import clock
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def lookat(cam_pos, target_pos, up = ()):
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dp = cam_pos - target_pos
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class VideoSynth(object):
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def __init__(self, size=None, noise=0.0, bg = None, **params):
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self.bg = None
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self.frame_size = (640, 480)
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if bg is not None:
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self.bg = cv2.imread(bg, 1)
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h, w = self.bg.shape[:2]
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self.frame_size = (w, h)
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if size is not None:
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w, h = map(int, size.split('x'))
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self.frame_size = (w, h)
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self.bg = cv2.resize(bg, self.frame_size)
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self.noise = float(noise)
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w, h = self.frame_size
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self.K = np.float64([[1.0/w, 0.0, 0.5*(w-1)],
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[ 0.0, 1.0/w, 0.5*(h-1)],
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[ 0.0, 0.0, 1.0]])
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def draw_layers(self, dst):
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pass
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def read(self, dst=None):
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w, h = self.frame_size
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if self.bg is None:
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buf = np.zeros((h, w, 3), np.uint8)
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else:
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buf = self.bg.copy()
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self.draw_layers(buf)
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if self.noise > 0.0:
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noise = np.zeros((h, w, 3), np.int8)
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cv2.randn(noise, np.zeros(3), np.ones(3)*255*self.noise)
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buf = cv2.add(buf, noise, dtype=cv2.CV_8UC3)
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return True, buf
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def create_capture(source):
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'''
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source: <int> or '<int>' or '<filename>' or 'synth:<params>'
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'''
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try: source = int(source)
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except ValueError: pass
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else:
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return cv2.VideoCapture(source)
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source = str(source).strip()
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if source.startswith('synth'):
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ss = filter(None, source.split(':'))
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params = dict( s.split('=') for s in ss[1:] )
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return VideoSynth(**params)
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return cv2.VideoCapture(source)
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presets = dict(
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empty = 'synth:',
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lena = 'synth:bg=../cpp/lena.jpg:noise=0.1'
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)
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if __name__ == '__main__':
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import sys
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import getopt
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print 'USAGE: video.py [--shotdir <dir>] [source0] [source1] ...'
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print "source: '<int>' or '<filename>' or 'synth:<params>'"
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print
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args, sources = getopt.getopt(sys.argv[1:], '', 'shotdir=')
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args = dict(args)
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shotdir = args.get('--shotdir', '.')
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if len(sources) == 0:
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sources = [ presets['lena'] ]
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print 'Press SPACE to save current frame'
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caps = map(create_capture, sources)
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shot_idx = 0
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while True:
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imgs = []
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for i, cap in enumerate(caps):
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ret, img = cap.read()
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imgs.append(img)
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cv2.imshow('capture %d' % i, img)
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ch = cv2.waitKey(1)
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if ch == 27:
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break
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if ch == ord(' '):
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for i, img in enumerate(imgs):
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fn = '%s/shot_%d_%03d.bmp' % (shotdir, i, shot_idx)
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cv2.imwrite(fn, img)
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print fn, 'saved'
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shot_idx += 1
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