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2014-12-09 13:49:14 -0600 | marked best answer | opencv_traincascade and opencv_createsample on windows I need to use a cascade classifier. I've read these guide which is prety clear. I use Windows 7 I've already use OpeNCV for 2 or 3 project in java, i've install it with this guide, with the prebuild libraries But when i'm trying those command, windows can't find them... i guess it's an install problem, but i can't find what's wrong. Sorry... noob problem... |
2014-12-09 13:46:57 -0600 | marked best answer | Image is empty Hi, i'm totally new with OpenCV and i'm starting with the Java version. I'm trying some basics. The first part in the java tutorial was a success. I'm trying the Lena's Face detection. But i've a problem when I'm loading the file : Console return : I'm sure the path to the picture is good, if i change it i've a segmentation fault. If someone have a idea... |
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2013-07-09 02:37:53 -0600 | marked best answer | The homography tutorial in java EDIT : main problem solved (see in comments) ! But i now have a problem with perspectiveTransform()... OpenCV Error: Assertion failed (scn + 1 == m.cols && (depth == CV_32F || depth == CV_64F)) in unknown function, file ......\src\opencv\modules\core\src\matmul.cpp, line 1926 Original post Hi, i'm trying to redo this tutorial in Java... but it doesn't work. The findHomography function didn't work, and the error message isn't very clear for me : I realy hope someone will be able to help me... i'm a novice with OpenCV Here is my code, sorry it's a bit long : CODE UPDATED (more) |
2013-05-06 10:29:06 -0600 | commented answer | Java : How to use Crosscheck ? Thanx a lot, I'll try this tomorrow but that's look nice :) |
2013-05-06 02:51:49 -0600 | asked a question | Java : How to use Crosscheck ? Hi ! I've follow the tutorial "object detection in a scene" (http://docs.opencv.org/doc/tutorials/features2d/feature_homography/feature_homography.html#feature-homography) and redo the same thing in java... and that's work pretty well. But I still have a question. If I want to search an object which is not in the scene, I still have a (false) result. If I've well understand, using the crosscheck option for the brute-force matcher can help to deal with that. But I can't find how to use crosscheck, I can't find it in the Javadoc... I've also read than knnmatch() can probably help me but I don't understand how. I already have my four points with "the best distance" when I follow the tutorial. If I follow my instinct, the false-positive have to be detect after the findHomography() function. Nope ? Is there somebody who can help me with my outliers ? :) |
2013-04-23 07:50:27 -0600 | commented answer | False positive in object detection Thank you very much for all those idea! I'll try all of them and see which one is the best in my case ! |
2013-04-22 04:17:27 -0600 | commented question | False positive in object detection It was this one (sorry for my late) http://docs.opencv.org/doc/tutorials/features2d/feature_homography/feature_homography.html#feature-homography |
2013-04-18 02:32:49 -0600 | asked a question | False positive in object detection Hi ! I've follow the tutorial "object detection in a scene" and that's work pretty well. But I still have a question. In my little app, i want to know which object (in a list) is in the scene. When the object is really in the scene, there is no problem (that's a really good point). But the algorithm is always finding a match, even if the object is not in the scene. Most of the time, when the result is wrong, the 4 points don't form a square, it's a line, a big point or something like an hourglass. Is there a function who can detect / evaluate the probability of a false positive, or i have to do some math by myself ? :) |
2013-04-18 02:12:05 -0600 | commented answer | The homography tutorial in java Hi, Sorry for my late, i havn't see your answer. You shoul try this way : Mat hg = Calib3d.findHomography(obj, scene, 8, 10); //8 for RANSAC //10 for the reprojection error Hop it will help you ! |
2013-04-09 08:37:53 -0600 | commented answer | OpenCV Java for a multiplatform app Yes, that's a problem. That's why i'm don't know how to deal with this dll. If there was a ".so" file instead of the dll, i will do something like : String system = System.getProperty("os.name"); if system == Windows extension = "dll"; else extension = "so" But there is not =/ Or i havn't found how to create them... |
2013-04-09 08:13:32 -0600 | commented answer | OpenCV Java for a multiplatform app So... after a day of trying... i havn't succeed with that. But i've found an other way to do it : in eclipse, i've create a dependance between the two project. This way, when i build my project, the dll are found :) But i still have a problem... how to deal with the dll ? Remember, i want to create a multiplatform app thank's to the java support, and i havn't found any .so files =/ |
2013-04-08 06:49:01 -0600 | commented answer | OpenCV Java for a multiplatform app How can i add this dll ? When i create my jar in eclipse, i've check the box "Package required library into generated jar" |
2013-04-08 05:05:14 -0600 | asked a question | OpenCV Java for a multiplatform app Hi, I'm trying to create a multiplaform app with OpenCV. The Java Support was pretty much a good news for me :) I've install OpenCV, create a first app on windows and i'm trying to make an executable jar. But i suppose i'll have a lot of problem thanks to the dll... I've create in Eclipse a jar who include all the libraries needed. If a create a new project on windows, import my new jar, i can create object declared in my jar but when i run : And if i do the same thing on a RedHat, i've also an error : (Ident.java:84 is the first line using an OpenCV command) Would anyone have a tips or a link to a good step-by-step of creating a multiplatform runnable Jar in eclipse with Open CV in it ? Thanks in advance. Edit : So... after a day of trying... i havn't succeed with that. But i've found an other way to do it : in eclipse, i've create a dependance between the two project. This way, when i build my project, the dll are found :) But i still have a problem... how to deal with the dll ? Remember, i want to create a multiplatform app thank's to the java support, and i havn't found any .so files =/ |