105 lines
2.6 KiB
Python
105 lines
2.6 KiB
Python
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#!/usr/bin/env python
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'''
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Morphology operations.
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Usage:
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morphology.py [<image>]
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Keys:
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1 - change operation
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2 - change structure element shape
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ESC - exit
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'''
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# Python 2/3 compatibility
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from __future__ import print_function
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import sys
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PY3 = sys.version_info[0] == 3
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import numpy as np
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import cv2 as cv
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def main():
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import sys
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from itertools import cycle
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from common import draw_str
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try:
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fn = sys.argv[1]
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except:
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fn = 'baboon.jpg'
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img = cv.imread(cv.samples.findFile(fn))
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if img is None:
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print('Failed to load image file:', fn)
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sys.exit(1)
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cv.imshow('original', img)
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modes = cycle(['erode/dilate', 'open/close', 'blackhat/tophat', 'gradient'])
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str_modes = cycle(['ellipse', 'rect', 'cross'])
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if PY3:
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cur_mode = next(modes)
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cur_str_mode = next(str_modes)
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else:
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cur_mode = modes.next()
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cur_str_mode = str_modes.next()
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def update(dummy=None):
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try: # do not get trackbar position while trackbar is not created
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sz = cv.getTrackbarPos('op/size', 'morphology')
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iters = cv.getTrackbarPos('iters', 'morphology')
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except:
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return
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opers = cur_mode.split('/')
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if len(opers) > 1:
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sz = sz - 10
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op = opers[sz > 0]
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sz = abs(sz)
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else:
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op = opers[0]
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sz = sz*2+1
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str_name = 'MORPH_' + cur_str_mode.upper()
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oper_name = 'MORPH_' + op.upper()
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st = cv.getStructuringElement(getattr(cv, str_name), (sz, sz))
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res = cv.morphologyEx(img, getattr(cv, oper_name), st, iterations=iters)
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draw_str(res, (10, 20), 'mode: ' + cur_mode)
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draw_str(res, (10, 40), 'operation: ' + oper_name)
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draw_str(res, (10, 60), 'structure: ' + str_name)
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draw_str(res, (10, 80), 'ksize: %d iters: %d' % (sz, iters))
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cv.imshow('morphology', res)
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cv.namedWindow('morphology')
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cv.createTrackbar('op/size', 'morphology', 12, 20, update)
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cv.createTrackbar('iters', 'morphology', 1, 10, update)
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update()
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while True:
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ch = cv.waitKey()
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if ch == 27:
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break
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if ch == ord('1'):
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if PY3:
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cur_mode = next(modes)
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else:
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cur_mode = modes.next()
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if ch == ord('2'):
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if PY3:
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cur_str_mode = next(str_modes)
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else:
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cur_str_mode = str_modes.next()
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update()
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print('Done')
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if __name__ == '__main__':
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print(__doc__)
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main()
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cv.destroyAllWindows()
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