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2012-07-23 10:58:34 -0600 | commented question | 1D blobs with MSER @Misha: I can't yet comment onto your answer. I'm using MSER because I wasn't able to find a more suitable algorithm that I don't need to implement myself, I'm very short on time, so, well I came to OpenCV.. I'll look into these |
2012-07-23 10:53:39 -0600 | answered a question | Segfault on feature detection OK, the problem was that MSER accepts only types CV8UC1 and CV8UC3 |
2012-07-23 10:19:38 -0600 | asked a question | Segfault on feature detection Hello, I'm trying to use MSER in a kinect code I have, but it's segfaulting inside the code, and I'm not sure why. This is the code, and it's all the calls to CV I have. My first idea was to detect blobs in 1D but there doesn't seem to be a way of doing it. I tried running MSER with a 1x320 Mat but that failed, I figured it might be because of the 1x Mat didn't work for the algorithm. I widened it to 7x but it still fails. Maybe this isn't the smartest way to do the buffer conversion, but that's not the point right now, why is that detection failing? am I missing some kind of initialization? And since we're at this, is there a way I can have CV TRACK the features (link one frame's to the next) after detecting them? If it helps, apparently a malloc within the library is failing, it's trying to alloc 7399104 bytes and malloc is returning |
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2012-07-20 12:54:39 -0600 | commented answer | How to Create an image from pixels in memory? how did you know this was a depthFrame? |
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2012-07-20 10:09:43 -0600 | commented answer | How to Create an image from pixels in memory? Oh! wait, just to get clear.. this is video (image stream) data. Is there a better way to do it in this case? |
2012-07-20 10:08:41 -0600 | commented answer | How to Create an image from pixels in memory? Great, no I'll copy it because I want to use just one or two lines of the original image (well, maybe I could do Mat depthFrame(2, cols, CV16UC1, depthMap + linewidth * SELECTEDLINE)). |
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2012-07-20 09:45:31 -0600 | asked a question | How to Create an image from pixels in memory? How can I create an image from an array of bytes (or even better u16)? I'm having a hard time going through the docs, sorry for the n00b question By the by, this is to be used for video (blob tracking on a depth field) |
2012-07-20 09:42:28 -0600 | asked a question | 1D blobs with MSER I have to clarify, I haven't even tried to compile an example yet, but I want to know whether I'm barking up the right tree or not. I'm trying to detect some blobs in 1D in order to detect where are the legs in a single line of kinect depth map input. From what I've read around, it sounds like MSER is my best option here, although I don't know how well will it work with a single-line image, although I could make it as wide as 4 or 8 lines, the idea is not to depend on skeleton detection because that has too many prerequisites, and I want this to work with an arbitrary amount of people. I decided to try OpenCV because writing the algorithm myself looked like overkill. I come here because I wasn't able to find any documentation that actually says something =/ What would be the right path to take here? I take I'll need to adjust the params so the algorithm is quite sensitive, since the data will represent mm and after threshold it'll range only between 800~1800 |