mirror of
https://github.com/opencv/opencv.git
synced 2024-11-26 04:00:30 +08:00
79 lines
2.5 KiB
Python
79 lines
2.5 KiB
Python
import numpy as np
|
|
import cv2, cv
|
|
|
|
help_message = '''
|
|
USAGE: watershed.py [<image>]
|
|
|
|
Use keys 1 - 7 to switch marker color
|
|
SPACE - update segmentation
|
|
r - reset
|
|
a - switch autoupdate
|
|
ESC - exit
|
|
|
|
'''
|
|
|
|
class App:
|
|
def __init__(self, fn):
|
|
self.img = cv2.imread(fn)
|
|
h, w = self.img.shape[:2]
|
|
self.markers = np.zeros((h, w), np.int32)
|
|
self.markers_vis = self.img.copy()
|
|
self.cur_marker = 1
|
|
self.colors = np.int32( list(np.ndindex(2, 2, 2)) ) * 255
|
|
|
|
cv2.imshow('img', self.markers_vis)
|
|
|
|
self.prev_pt = None
|
|
self.need_update = False
|
|
self.auto_update = True
|
|
cv2.setMouseCallback('img', self.onmouse)
|
|
|
|
|
|
def onmouse(self, event, x, y, flags, param):
|
|
pt = (x, y)
|
|
if event == cv.CV_EVENT_LBUTTONDOWN:
|
|
self.prev_pt = pt
|
|
if self.prev_pt and flags & cv.CV_EVENT_FLAG_LBUTTON:
|
|
color = map(int, self.colors[self.cur_marker])
|
|
cv.Line(self.markers, self.prev_pt, pt, self.cur_marker, 5)
|
|
cv.Line(self.markers_vis, self.prev_pt, pt, color, 5)
|
|
self.need_update = True
|
|
self.prev_pt = pt
|
|
cv2.imshow('img', self.markers_vis)
|
|
else:
|
|
self.prev_pt = None
|
|
|
|
def watershed(self):
|
|
m = self.markers.copy()
|
|
cv2.watershed(self.img, m)
|
|
vis = np.uint8( (self.img + self.colors[np.maximum(m, 0)]) / 2 )
|
|
cv2.imshow('watershed', vis)
|
|
self.need_update = False
|
|
|
|
def run(self):
|
|
while True:
|
|
ch = cv2.waitKey(10)
|
|
if ch == 27:
|
|
break
|
|
if ch >= ord('1') and ch <= ord('7'):
|
|
self.cur_marker = ch - ord('0')
|
|
print 'marker: ', self.cur_marker
|
|
if ch == ord(' ') or (self.need_update and self.auto_update):
|
|
self.watershed()
|
|
if ch in [ord('a'), ord('A')]:
|
|
self.auto_update = not self.auto_update
|
|
print 'auto_update if', ['off', 'on'][self.auto_update]
|
|
if ch in [ord('r'), ord('R')]:
|
|
self.markers = np.zeros(self.img.shape[:2], np.int32)
|
|
self.markers_vis = self.img.copy()
|
|
cv2.imshow('img', self.markers_vis)
|
|
cv2.destroyWindow('watershed')
|
|
|
|
|
|
if __name__ == '__main__':
|
|
import sys
|
|
try: fn = sys.argv[1]
|
|
except: fn = '../cpp/fruits.jpg'
|
|
print help_message
|
|
App(fn).run()
|