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Fix the mouse bug and the problem of collapse

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This commit is contained in:
BinMatrix 2016-01-13 19:04:17 +08:00
parent e3690db4bd
commit c7481c55f7
1 changed files with 11 additions and 18 deletions
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27
samples/python/camshift.py
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@ -46,28 +46,22 @@ class App(object):
self.selection = None self.selection = None
self.drag_start = None self.drag_start = None
self.tracking_state = 0
self.show_backproj = False self.show_backproj = False
self.track_window = None
def onmouse(self, event, x, y, flags, param): def onmouse(self, event, x, y, flags, param):
x, y = np.int16([x, y]) # BUG
if event == cv2.EVENT_LBUTTONDOWN: if event == cv2.EVENT_LBUTTONDOWN:
self.drag_start = (x, y) self.drag_start = (x, y)
self.tracking_state = 0 self.track_window = None
return
if self.drag_start: if self.drag_start:
if flags & cv2.EVENT_FLAG_LBUTTON: xmin = min(x, self.drag_start[0])
h, w = self.frame.shape[:2] ymin = min(y, self.drag_start[1])
xo, yo = self.drag_start xmax = max(x, self.drag_start[0])
x0, y0 = np.maximum(0, np.minimum([xo, yo], [x, y])) ymax = max(y, self.drag_start[1])
x1, y1 = np.minimum([w, h], np.maximum([xo, yo], [x, y])) self.selection = (xmin, ymin, xmax, ymax)
self.selection = None if event == cv2.EVENT_LBUTTONUP:
if x1-x0 > 0 and y1-y0 > 0:
self.selection = (x0, y0, x1, y1)
else:
self.drag_start = None self.drag_start = None
if self.selection is not None: self.track_window = (xmin, ymin, xmax - xmin, ymax - ymin)
self.tracking_state = 1
def show_hist(self): def show_hist(self):
bin_count = self.hist.shape[0] bin_count = self.hist.shape[0]
@ -88,7 +82,6 @@ class App(object):
if self.selection: if self.selection:
x0, y0, x1, y1 = self.selection x0, y0, x1, y1 = self.selection
self.track_window = (x0, y0, x1-x0, y1-y0)
hsv_roi = hsv[y0:y1, x0:x1] hsv_roi = hsv[y0:y1, x0:x1]
mask_roi = mask[y0:y1, x0:x1] mask_roi = mask[y0:y1, x0:x1]
hist = cv2.calcHist( [hsv_roi], [0], mask_roi, [16], [0, 180] ) hist = cv2.calcHist( [hsv_roi], [0], mask_roi, [16], [0, 180] )
@ -100,7 +93,7 @@ class App(object):
cv2.bitwise_not(vis_roi, vis_roi) cv2.bitwise_not(vis_roi, vis_roi)
vis[mask == 0] = 0 vis[mask == 0] = 0
if self.tracking_state == 1: if self.track_window and self.track_window[2] > 0 and self.track_window[3] > 0:
self.selection = None self.selection = None
prob = cv2.calcBackProject([hsv], [0], self.hist, [0, 180], 1) prob = cv2.calcBackProject([hsv], [0], self.hist, [0, 180], 1)
prob &= mask prob &= mask