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2017-04-15 20:53:28 -0600 | commented question | create convexhull around detected keypoints I want to ask about find contours I take the input and output contours .. what will be the input in this case, will it be the MatOfpoint from keypoints list ?? |
2017-04-15 20:50:07 -0600 | commented question | create convexhull around detected keypoints can you give me example for convex hull using java ? |
2017-04-15 17:01:29 -0600 | commented question | create convexhull around detected keypoints I can not understand this point please more details : sadly it only has the indexed version (do you have to use java ?) so you need to look up the hull points using the indexes returned from your Point array |
2017-04-15 08:15:19 -0600 | asked a question | obstacle detection size expansion algorithm I try to follow this paper (Monocular Vision-Based Obstacle Detection/Avoidance for Unmanned Aerial Vehicles) to do obstacle detection, I worked with SIFT algorithm in order to detect the keypoints in both images (two consecutive frames), then the Brute-Force Algorithm to match them,. Then I should extract the keypoints that its keypoints are expanding in the second image, this is by comparing the size property of the keypoints and save it in a new vector of keypoints. Finally, I want to use the functions to create the the convex hull around the final keypoints after filtering, and drawing it using findContours function. How to create this convex with key points? |
2017-04-15 08:12:30 -0600 | commented question | create convexhull around detected keypoints I try to follow this paper (Monocular Vision-Based Obstacle Detection/Avoidance for Unmanned Aerial Vehicles) to do obstacle detection, I worked with SIFT algorithm in order to detect the keypoints in both images (two consecutive frames), then the Brute-Force Algorithm to match them,. Then I should extract the keypoints that its keypoints are expanding in the second image, this is by comparing the size property of the keypoints and save it in a new vector of keypoints. Finally, I want to use the functions to create the the convex hull around the final keypoints after filtering, and drawing it using findContours function. How to do this? |
2017-04-14 19:46:36 -0600 | asked a question | create convexhull around detected keypoints I read an image in android and detect the keypoints using sift algorithm, then I want to create Object of Interest (OOI) around these keypoints by creating a convex hull of the corresponding points How can I create this convexhull and draw it using findcontours ??? this is my code: |
2017-03-20 13:28:36 -0600 | commented question | error with opencv threshold and findcontours Yes I try to get the convex area around the key points to compare the two convex of the matched keypoints of the two images .. so I can dectec the obstacle due to size expansion algorithm |
2017-03-20 10:02:44 -0600 | commented question | error with opencv threshold and findcontours the keyPoints Mat is 7 channel how can I convert it to 3 channels so I can apply gray function |
2017-03-20 09:03:58 -0600 | commented question | error with opencv threshold and findcontours how can I do this ?? |
2017-03-20 07:27:12 -0600 | commented question | error with opencv threshold and findcontours this is the error error: (-215) scn == 3 || scn == 4 in function void cv::cvtColor(cv::InputArray, cv::OutputArray, int, int) |
2017-03-20 07:22:31 -0600 | asked a question | error with opencv threshold and findcontours I try to load two Images and get the matched keypoints and draw convexhull on the matched keypoints with bigger size ..any help with this error this my code: (more) |
2017-02-25 06:22:15 -0600 | commented question | algorithm to computer vision obstacle detection ?? My objective is to make a simple blind assistant I am using "indoor atlas" for indoor navigation (mobile application) and I am trying to implement obstacle detection while positioning and tracking so the camera will be with some angle in front of him |
2017-02-23 05:42:03 -0600 | commented question | algorithm to computer vision obstacle detection ?? Yes I use only my mobile camera |
2017-02-22 18:33:47 -0600 | asked a question | algorithm to computer vision obstacle detection ?? My graduation project is indoor navigation system for blind people so I need to implement obstacle detection using android and open CV, I followed these steps but accuracy is not good : 1- convert to grayscale 2-canny function to detect edges 3- dilate the detected edges by 500% 4- blur the image using a Gaussian blur 5- use findContours function to detect closed shapes and draw bounding circles around the shapes any help with paper or algorithm I should follow?? |