38 lines
916 B
Python
38 lines
916 B
Python
from __future__ import division, print_function
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import sys
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import cv2
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import numpy as np
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image = np.zeros((200, 200, 3), dtype=np.uint8)
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window = 'HSV Explained'
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h, s, v = 0, 255, 255
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print('u, i, o: increase h, s, v respectively\n',
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'j, k, l: decrease h, s, v respectively\n',
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'(focus on the image window for this)\n', sep='')
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while True:
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image[:] = h, s, v
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im2show = cv2.cvtColor(image, cv2.COLOR_HSV2BGR)
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print(' HSV:', h, s, v, ' ', end='\r')
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sys.stdout.flush()
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cv2.imshow(window, im2show)
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key = cv2.waitKey(0)
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if key == ord('q'):
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break
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elif key == ord('u'):
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h = (h + 1) % 180
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elif key == ord('j'):
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h = (h - 1) % 180
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elif key == ord('i'):
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s = min(s + 1, 255)
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elif key == ord('k'):
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s = max(s - 1, 0)
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elif key == ord('o'):
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v = min(v + 1, 255)
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elif key == ord('l'):
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v = max(v - 1, 0)
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