Signal Processing Stack Exchange
Signal Processing Stack Exchange

Questions tagged [opencv]

OpenCV (Open Source Computer Vision) is a cross-platform library of programming functions for real time computer vision.

What is OpenCV ?

OpenCV is a library of optimized functions which are useful for Image processing, Computer Vision, etc. applications. Officially launched by Intel in 1999 and now supported by Willow Garage. Uses include: Human-Computer Interaction; Object Identification, Segmentation and Recognition; Face Recognition; Gesture Recognition; Motion Tracking, Motion Understanding; Stereo and Multi-Camera Calibration and Depth Computation; Mobile Robotics. More information may be found at wikipedia, on the project's wiki and on the project's developer site.

What Questions should have this tag ?

Questions related to usage of OpenCV libraries can bear this tag. See also what have already been asked in StackOverflow for this tag.

358 questions
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False SURF output in video

I am trying to find the three cervical vertebrae (C2 , C3 , C4)in x-ray videos (gray images) I am using SURF to identify the place that has these 3 vertebrae (big box for all of them ) SURF gives me good result in this case Now I am trying to…
seereen
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Scale and Rotation invariant color based feature descriptors

SIFT/SURF/ORB etc are grayscale based, if the two grayscale bitmap is very similar, but the RGB channel is quite different, how to classify them? So, I think there should be some color based feature descriptors, also have scale and rotation…
coollofty
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Opencv circle detection android

Goodmorning, I have to do a circle detection with android studio using opencv, i follow the example find in internet but it didn't work and i don't understand why, i'm new of android. Can someone help me? This is the code that I found in…
user3231800
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Morphological operations to isolate and preserve network graph structure?

Suppose there is an image with long, connected lines which form connected, closed cycles in an image. Is there a standard morphological approach to isolate only the lines, and drop all other pixels? I can imagine a couple of slow…
Chris
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Can I create a transformation matrix from rotation/translation vectors?

I'm trying to deskew an image that contains an element of known size. Here's a test image: I can use aruco::estimatePoseBoard which returns rotation and translation vectors. Is there a way to use that information to deskew everything that's in the…
SSteve
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