orhan's profile - activity

It seems like you skipped to install mrp2_description package.

$ sudo apt-get install ros-indigo-mrp2-description

Hi Marwa, Did you try sourcing your workspace?

$ source ~/YOUR_WORKSPACE/devel/setup.bash

After that you could be able to roscd to mrp2_navigation package.

$ roscd mrp2_navigation/

then write your own

i liked this one and it really helped me alot, uses python...

Programming Robots ROS Practical Introduction

it works thanks alot

thank you , i'll try that and update tomorrow

If you drag and drop that will work fine and also you can create by typing /foldername while adding a file

Hi ,

using github for the first time is a bit tricky. just create a repository and put a readme in it. after that on the right side you will see upload files button from there you can upload your files.

for creating sub directories you can check this link http://stackoverflow.com/questions/18... it is really easy with this method but not efficient for large packages.

just try roslaunch turtlebot_bringup 3dsensor.launch after that run rostopic echo /camera/rgb/image_raw you ll be able to see the data

Hi ,

So i'm trying to detect lines with turtlebot via kinect rgb camera. Everything was working until i added cv2.HoughLinesP() i think it still works but image window comes up as menubar only :) canny and gaussianblur works fine with a bit latency but at least i can see the image

i tried to add rospy.sleep() . im not sure where to go from this point. any suggestions?

thanks

def __init__(self):
    rospy.init_node('test_node')
    self.bridge=CvBridge()

    self.image_sub = rospy.Subscriber("/camera/rgb/image_color", Image, self.callback)

def callback(self,data):
    try:
        cv_image = self.bridge.imgmsg_to_cv2(data, "bgr8")
    except CvBridgeError as e:
        print(e)

    cv_image=(255-cv_image)

    g_img=cv2.cvtColor(cv_image,cv2.COLOR_BGR2GRAY)
    g_img=cv2.GaussianBlur(g_img,(5,5),200)
    thresh=cv2.Canny(g_img,5,150,5)
    lines = cv2.HoughLinesP(thresh,2,np.pi/180,100,100,1)
    print lines.shape
    for i in range(0,lines.shape[0]):
        for x1,y1,x2,y2 in lines[i]:
            cv2.line(cv_image,(x1,y1),(x2,y2),(0,255,0),2)

    cv2.imshow("image",lines)
    cv2.waitKey(3)
    #rospy.sleep(10)