I have a program, with six trackbars that helps me find the range of colours I can use to detect an object. There are sets of sliders, and the low values, should never exceed the high values, or the output is rendered useless.
I can adjust the trackbars manually, to set the high values as always greater than the low value, but its a little tedious. I would like to have a function update the position of the high trackbar, if the value on the low trackbar exceeds it.
# create track bars
cv2.createTrackbar('B-low','image',0,255,nothing)
cv2.createTrackbar('B-high','image',255,255,nothing)
while (1):
bl = cv2.getTrackbarPos('B-low','image')
bh = cv2.getTrackbarPos('B-high','image')
if bh < bl:
print(bl)
bh == cv2.getTrackbarPos('B-high','image') + 1
I dont see an option for SetTrackBar position in [the user interface documentation.](http://docs.opencv.org/3.0-beta/modules/highgui/doc/user_interface.html)
If anyone has an idea how I might do this, I'd be very interested. This is python, But I would be interested in C++ as well.
Full source: http://pastebin.com/7JHJsFxf
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