49 lines
1.2 KiB
Python
Executable File
49 lines
1.2 KiB
Python
Executable File
import numpy as np
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import cv2
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from time import clock
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import sys
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import video
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if __name__ == '__main__':
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hsv_map = np.zeros((180, 256, 3), np.uint8)
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h, s = np.indices(hsv_map.shape[:2])
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hsv_map[:,:,0] = h
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hsv_map[:,:,1] = s
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hsv_map[:,:,2] = 255
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hsv_map = cv2.cvtColor(hsv_map, cv2.COLOR_HSV2BGR)
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cv2.imshow('hsv_map', hsv_map)
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cv2.namedWindow('hist', 0)
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hist_scale = 10
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def set_scale(val):
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global hist_scale
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hist_scale = val
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cv2.createTrackbar('scale', 'hist', hist_scale, 32, set_scale)
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try: fn = sys.argv[1]
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except: fn = 0
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cam = video.create_capture(fn, fallback='synth:bg=../cpp/baboon.jpg:class=chess:noise=0.05')
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while True:
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flag, frame = cam.read()
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cv2.imshow('camera', frame)
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small = cv2.pyrDown(frame)
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hsv = cv2.cvtColor(small, cv2.COLOR_BGR2HSV)
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dark = hsv[...,2] < 32
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hsv[dark] = 0
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h = cv2.calcHist( [hsv], [0, 1], None, [180, 256], [0, 180, 0, 256] )
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h = np.clip(h*0.005*hist_scale, 0, 1)
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vis = hsv_map*h[:,:,np.newaxis] / 255.0
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cv2.imshow('hist', vis)
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ch = 0xFF & cv2.waitKey(1)
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if ch == 27:
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break
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cv2.destroyAllWindows()
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