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Melkarid's profile - activity

2018-07-18 14:02:38 -0500 asked a question Sync cv2.VideoCapture(0) frames with Capture Card?

Sync cv2.VideoCapture(0) frames with Capture Card? Hi all, I'm running into a problem with my current setup. I have a v

2018-06-01 11:13:42 -0500 asked a question Drawing Detected Sobel Edges

Drawing Detected Sobel Edges I currently want to detect all perfectly horizontal edges in an image, and using the Sobel

2017-08-09 15:11:52 -0500 asked a question cv::Tracker linker error in Xcode?

Every time I try to initialize a cv::Tracker I receive a "Apple Mach-O Linker (Id) Error". I've searched extensively for solutions, having

  • Included #include <opencv2 tracking="" tracking.hpp="">
  • Updated all the search paths in build settings
  • Updated the frameworks in build paths
  • Cleaned the product, restarted Xcode
  • Rebuilt the opencv2 framework with contrib (so tracking is definitely there)

Nothing works. I keep getting this error and everything else runs fine if I comment out

"Ptr<tracker> tracker = Tracker::create("KCF");"

Any help is appreciated!

2017-07-05 09:43:41 -0500 received badge  Enthusiast
2017-06-29 15:04:27 -0500 asked a question Overlaying masked image over another?

I'm trying to overlay an image with a mask applied to it onto another image. The masked image displays black where I would like it to be transparent when copied onto the background image.

Is there any way to do this?

Thank you

2017-06-16 12:39:57 -0500 commented question Storing ORB Keypoints in file

Using 3.0.0

2017-06-16 11:09:27 -0500 asked a question Storing ORB Keypoints in file

I need to store ORB keypoints and descriptors inside some file, and am currently using Pickle but it is slow (~10-15 seconds to load). Is there another way that would allow for faster saving and loading?

I tried using JSON before but could not serialize the objects (since they are complicated). Could anyone provide insight?

2017-06-13 10:47:08 -0500 asked a question Whats does ORB descriptor represent?

When using ORB to compute key points and descriptors, descriptors are represented as arrays of length 32, for example:

[118 35 199 228 23 66 194 64 233 137 187 74 75 120 85 130 248 229 93 241 13 227 128 200 185 220 143 147 237 43 123 2]

What do these numbers represent?

2017-06-12 15:02:36 -0500 asked a question Segfault: 11 using FlannBasedMatcher

I'm trying to run a simple example of FlannBasedMatcher to match features between two pictures. However, sometimes when I instantiate a Flann object I get the following error message:


index_params = dict(algorithm = FLANN_INDEX_KDTREE, trees = 5)

search_params = dict(checks=50)

flann = cv2.FlannBasedMatcher(index_params, search_params)

Output: Segmentation fault: 11