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Hi,

i need help in object detection with python. there are many examples in the opencv folders. one of this is plane_tracker like in this video:

https://www.youtube.com/watch?v=pzVbhxx6aog

https://github.com/Itseez/opencv/blob/master/samples/python2/plane_tracker.py

I want to defined my area (rectangle per mouse) like in this video and only inside the boundary i want to dectect/track colors for example balls,different color of lights (leds).

Here is an example for color detection:

import cv2 import numpy as np

def getthresholdedimg(hsv): yellow = cv2.inRange(hsv,np.array((20,100,100)),np.array((30,255,255))) blue = cv2.inRange(hsv,np.array((100,100,100)),np.array((120,255,255))) both = cv2.add(yellow,blue) return both

c = cv2.VideoCapture(0) width,height = c.get(3),c.get(4) print "frame width and height : ", width, height

while(1): _,f = c.read() f = cv2.flip(f,1) blur = cv2.medianBlur(f,5) hsv = cv2.cvtColor(f,cv2.COLOR_BGR2HSV) both = getthresholdedimg(hsv) erode = cv2.erode(both,None,iterations = 3) dilate = cv2.dilate(erode,None,iterations = 10)

image,contours,hierarchy = cv2.findContours(dilate,cv2.RETR_LIST,cv2.CHAIN_APPROX_SIMPLE)

for cnt in contours:
    x,y,w,h = cv2.boundingRect(cnt)
    cx,cy = x+w/2, y+h/2

    if 20 < hsv.item(cy,cx,0) < 30:
        cv2.rectangle(f,(x,y),(x+w,y+h),[0,255,255],2)
        print "yellow :", x,y,w,h
    elif 100 < hsv.item(cy,cx,0) < 120:
        cv2.rectangle(f,(x,y),(x+w,y+h),[255,0,0],2)
        print "blue :", x,y,w,hHow can i now put these two codes together for:

cv2.imshow('img',f)

if cv2.waitKey(25) == 27:
    break

cv2.destroyAllWindows() c.release()

How can i now put these two codes together for:

define my area per mouse an detect inside der rectangle (area) differnt colors? Thanks a lot !

Greets,

Ja

Hi,

i need help in object detection with python. there are many examples in the opencv folders. one of this is plane_tracker like in this video:

https://www.youtube.com/watch?v=pzVbhxx6aog

https://github.com/Itseez/opencv/blob/master/samples/python2/plane_tracker.py

I want to defined my area (rectangle per mouse) like in this video and only inside the boundary i want to dectect/track colors for example balls,different color of lights (leds).

Here is an example for color detection:

import cv2
import numpy as np
 
np

def getthresholdedimg(hsv):
    yellow = cv2.inRange(hsv,np.array((20,100,100)),np.array((30,255,255)))
    blue = cv2.inRange(hsv,np.array((100,100,100)),np.array((120,255,255)))
    both = cv2.add(yellow,blue)
    return both
 
both

c = cv2.VideoCapture(0)
width,height = c.get(3),c.get(4)
print "frame width and height : ", width, height
 
height

while(1):
    _,f = c.read()
    f = cv2.flip(f,1)
    blur = cv2.medianBlur(f,5)
    hsv = cv2.cvtColor(f,cv2.COLOR_BGR2HSV)
    both = getthresholdedimg(hsv)
    erode = cv2.erode(both,None,iterations = 3)
    dilate = cv2.dilate(erode,None,iterations = 10)
 
10)

    image,contours,hierarchy = cv2.findContours(dilate,cv2.RETR_LIST,cv2.CHAIN_APPROX_SIMPLE)

 for cnt in contours:
     x,y,w,h = cv2.boundingRect(cnt)
     cx,cy = x+w/2, y+h/2

     if 20 < hsv.item(cy,cx,0) < 30:
         cv2.rectangle(f,(x,y),(x+w,y+h),[0,255,255],2)
         print "yellow :", x,y,w,h
     elif 100 < hsv.item(cy,cx,0) < 120:
         cv2.rectangle(f,(x,y),(x+w,y+h),[255,0,0],2)
         print "blue :", x,y,w,hHow can i now put these two codes together for:

 cv2.imshow('img',f)

 if cv2.waitKey(25) == 27:
     break

cv2.destroyAllWindows()
c.release()
 
cv2.destroyAllWindows()
c.release() 
How can i now put these two codes together for:
 
define my area per mouse an detect inside der rectangle (area) differnt colors?
Thanks a lot !
 
Greets,
 
Ja