2017-10-14 17:41:29 -0600 | received badge | ● Student (source) |
2014-10-26 06:20:09 -0600 | commented question | Bird camera: detect (rapid) camera movement Thanks for the suggestion! Indeed "optical flow" looks like a good place to start. And you are right that colour of the sea is not always the same. I am more of a mountain person, which is why my definition of ocean is big blue water reservoir :). |
2014-10-25 15:34:35 -0600 | asked a question | Bird camera: detect (rapid) camera movement Hi, I am just starting Computer Vision, which is why my question will not be very specific. We have at our disposal a set of videos that were recorded from birds' necks; the point is to learn more about behaviour of a certain species. There are in principle three actions to classify:
On top of that there are also videos that are just messy due to a camera that was fogged up or moved to a position that limits field of view to the bird's feathers (example). Can you give me some ideas what algorithms from OpenCV I could use to discriminate flapping (1) from gliding (2)? Since we are talking about birds that spend their day at the see, I guess distinction between gliding (2) and colony (3) should be simple by checking histogram content, right? Any thoughts about finding the instances in which camera was fogged? Histogram again perhaps? Gray tends to dominate there. |
2014-10-19 10:50:04 -0600 | commented question | Incorrect Assert information? Assertion failed (scn == 3 || scn == 4) in cv::cvtColor Not only I did not include full code, but also missed something embarassingly obvious... image name was different. Please save my honour and delete this post. |
2014-10-19 10:26:43 -0600 | asked a question | Incorrect Assert information? Assertion failed (scn == 3 || scn == 4) in cv::cvtColor When I try to convert Lena from colour to gry, I get the following assertion error: OpenCV Error: Assertion failed (scn == 3 || scn == 4) in cv::cvtColor, file C:\builds\2_4_PackSlave-win64-vc12-shared\opencv\modules\imgproc\src\color.cpp, line 3739 According to what I read from other posts, it indicated that number of channels is different than 3 or 4. Here it is not the case. My code: I am working in Visual Studio 2013, 64bit build. |